Classic CORVETTE Drains Battery Overnight? - Part 1
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- Опубліковано 29 жов 2021
- Oooh a classic CORVETTE!
This 1968 Vette recently developed a big parasitic draw that will drain the battery flat overnight.
How hard can can it be to pinpoint a parasitic draw on an old school car?
Well, there are MORE variables here than on some modern cars!
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Enjoy the trip back in time!
Ivan - Авто та транспорт
Customer: it has a battery draw. Me: I'm gonna need to test drive it first 😃
U know Ivan can't wait.
As cool as that car looks, Honda's new minivan has more hp (280) and is fastet than that vette ever was. (From the factory) 😂
As a young mechanic, one of the fastest cars i drove was a 1970 Corvette 454 4spd. The boss, an old racer, said, "Don't wreck it!" The sound at WOT was magical.
@@hightttech Im old now but I used to scare the shit outta all my friends with my 74 454 LS7 4 spd that would lite the tires at 65 and run out at 8500RPM's (far from stock}
@@moviemania1137 Dream on. The rear end gear ratio of the Vette is around 3:80 coupled with a light weight sports car with 300 HP and would blow the doors off your moms car. Better think again.
Ah the days when an owner manual taught you how to maintain your car, not how to operate the gadgets in your transportation appliance.
Simple car but those old wiring diagrams are as difficult as untangling a ball of wool while you're on a train with a cat playing with it. Crazy wiper system on that beast.
Always good to watch your process - thanks, Ivan!
I like that analogy 👌😅
Welcome to my world. The old days when engineers had common sense. And tech writers could write with the clarity anyone with a third grade education could understand.
While it is a complex wiring system, it is logical. If that was a modern vehicle with the BCM controlling everything, I fear most DIY'ers would not have a hope of finding the fault in a hurry, if at all. The time Ivan spent on this diagnosis was well within the bounds of a DIY'er finding it in a similar time frame. Bearing in mind the only tool used was an AVO, albeit a clamp on one, which are dirt cheap these days. The critical thing here was understanding how the system worked, which formed most of the time spent diagnosing this issue, not the physical work on the vehicle. Thank you Ivan for showing us your methodology.
Everything is power and grounds, no serial or canbus data to get in the way.
Yes that Is A Very Informative Video. And It Is Very Complex Issue.
Important to note that the short stub ends of wire that are a different color at the connections are fusible links. They served to protect the rest of the car's wiring in a worst-case short-to-ground scenario. Otherwise, the car could literally burn to the ground. They were always four gauges smaller than the protected wiring and are covered in a thick, fire-resistant insulation.
I enjoyed seeing wiring diagrams that I'm familiar with on the channel. It's also neat to see a "base model" Corvette. With the base 327 and 4-speed, I also noticed manual steering and brakes (but at least 4 wheel disc brakes were standard equipment!).
Without even watching I knew what it was..welcome to the joy of 68 Vettes!
Welcome to Corvette, one of life’s enigmas 😂
Battery > starter > horn relay > everything was common GM wiring back then. Easy to track down, especially in the full size cars.
My vet story. In 1968 at the age of 19, I was lucky enough to buy a 1959 vet for $650.00. Nothing wrong with it, except it needed a paint job. It had a rag top, and a removable hard top. The engine was a 327 with a dual line Holley carb. Car had electric windows, and a Wonderbar radio. The wheels were chrome reversed with baby moon hub caps. Absolutely the best car I`ve ever owned. Funny side note, A years worth of PL/PD insurance cost me $1200.00 dollars, twice what I paid for the car.
complex wiper system for that time but what a thing of beauty..
Finally a car that I know the problem when the video started. Old school is my middle name.
I love old books they were full of useful information even on my 05 Toyota
Ah yes, a classic indeed. On a car that old who knows what work has been done in the past. But your up for the challenge! That car is in great shape. I had a 1970 Corvette convertible with a 454...man I miss that car.
Excellent!!
After you've completed the videos you should probably edit them down to one and name it 68' through 72' Corvette windshield wiper service tutorial or something like that cause the Corvette guys would appreciate it greatly I bet...
Great troubleshooting skills Ivan a very unique wiring. This type of vintage car is very unique no fancy sensors just simple system, auto techs of today will have a very hard times figuring this type of wiring because they barely read electrical schematics. Good video stay safe and healthy. Thanks 😊
Uh where do I plug in the diag computer??? Lolz.
😍 Ugh. That car reminds me of my step fathers '76 Vette he sold a couple years ago. He bought it new with 16 miles on the clock. Sold it with 54k on the clock. Still so mad I could spit that he sold it. Helped refinish it from chassis up with better engine exhaust, wheels, suspension, seats refunished and new paint job from white to metallic maroon. I did all the rewiring of the stereo system with OE fit speakers and fixed the original stereo deck so it would function properly (my second time ever doing electrical/electronics on a vehicle at 15yr old). That car was just as beautiful as this one.
Wow what an amazing study and awesome Ivan your diagnosis! It's just fun watching your thinking!
I'm sitting here talking to the screen telling you how to open the cowel. I had a 70.
Back then the manual told you how to fix things on you own car and to use tools etc. Now the owners manual tell you not to drink the contents of the battery. I'm guessing the limit switch and the micro switch need NPR Russian repair. Contact points have grown a bit of "schmoo" over the years.
Hah yeah back in the day owner's manuals actually contained USEFUL information instead of instructions of how not to kill yourself 😂. You will enjoy Part 2, no doubt 😉
I say take the warnings off everything and let natural selection run it's course.
@@paullenzen2562 yes just let nature run its course.
@@paullenzen2562
That's how we ended up with warnings....
Certainly a beautiful example of the body style and a very nice car, somewhere someone will happily pay the asking price, as always great job
Can't wait for Part II. Looking forward to the test drive! Ivan, Thanks for Sharing!
I’m impressed they actually tell you in the cars manual how to service the wiper blades you just don’t see that anymore
It's cool to see you work on a car that is older than you.😎🇨🇦
Can't wait for part 2 !!! Great video ! I had always heard that the 68 Corvette was always a very troublesome car because of it's new design.for that year .
I'm impressed that GM engineers practiced making things stupidly over complicated way back then so they could apply what they learned to today's rolling short circuits. : ) Amazing job on the diagnosis as always Ivan. Thanks for sharing.
Gms often have problems with wipers going to park position. Some would fail to park at all or like the late 80 and early 90 Trucks the wipers would stay on due to a failed pulse board-usually from water intrusion.
broken solder joints, was the most common
A drive through the hills of central Pa is the perfect testing area.😀
MIT had an entire department dedicated to teaching '68 Corvette Windshield Wiper Design and Implementation (CWWDI). Students had to first complete all rocket science courses as a prerequisite.
I'm impressed with the upkeep and maintenance on this old beauty. That looked like a new Brake master cylinder.
Got to love old school technology.
Super cool to see you figuring this one out 👍
That is the beauty of a mechanical system. Very complex in how it works, but easy with a wiring diagram to diagnose. Because of mechanical movement, parts exposure to dirt and water, problems like this would show up over time.
Looking forward to part 2 for the "fix."
Wow. Really Nice. 68 Vette. A True Classic. I worked on a couple of 327 engines a long time ago. They were built to last and were not made of Bi-Metals and plastic.* Real Steel* Great Parasitic Battery Drain Video. Always a follower of your channel and the great content you provide. Thumbs Up
Thank you Richard!
Great case study , thanks for sharing
Very interesting for sure. Thanks Ivan!
Well done All Data, very clever marketing to lease them for a $1 to Astronauts. Very nice looking American car, pre- pedestrian safety.
Great diagnosis Ivan, thanks for sharing.
Great job brother!! I love Alldata too. Been using for over 15 years.
Beautiful car, nice diag Ivan!
21:58 I love the picture of dude's arm actuating the wiper panel override: smart suit jacket with clean white shirt cuffs!
I always love the part 2. What else could be the problem. Ivan will find it.
Amazing...as always
Back in the day something like this would be brought to Johns Corvette, in Dearborn Michigan a suburb of Detroit! I went there once or twice for starter motors back in the seventies. I always was excited to go and see what there mechanics had in the shop. Don’t know if they still exist. Anything corvette !!!!!
Old fashioned diagnosis, brilliantly carried out.
I see the owner has added relays to push more than 9v up to the headlights...
Watching the video now Ivan but I'm going to comment before I go all the way through it, I have a 69 Corvette that I built myself it's got a 427 in it same color and it's a convertible built it from the body up , been watching your videos for a long time it's just so happens that you're working on one of these now very cool. Nice wiring diagram, welcome to old style GM. Mess around to adjust, add a dab of vasoline issue corrected lol
These systems if I remember where used from 68-72. In 73 they redesigned the hood so the wipers where merely hidden. These systems as you demonstrated where complex. It does not help that you had nothing to tell you how the system operated. You had to figure it out the hard way. Very nice work. I personally would have had to spend a lot more time than you did to figure it out for sure. It would be neat to see the system work like it was supposed.
Man that thing is GORGEOUS!!! My best friend's mom had a '71 ragtop just like that - same exact color, too. I've long since forgotten the differences between '68 & '71, but they're fairly similar - I think the bumpers were a little different. There was an L88 option for these in '69 that made 500 HP, and they say that was underrated. I'd LOVE to get my hands on one of those!!! Sadly these things are like gold today. Priced out of my league.
I actually read one of these before that had the wires reversed, except come to find out, the diagram was actually right. But the wire color was reversed. So my theory is that the manufacture never caught it because it was on the inside where it was going to a circuit that technically didn't have a correct polarity. Meaning it would work either way. And without uninstalling dash panels etc. You'd probably have never known that. So that's something that can happen as well. I originally thought alternator diodes. I knew this was just barely new enough to have an alnator vs generator. It's just not computer/electronically regulated like the newer ones. But these cars are actually simple its just that these in particular are very hard to maneuver vs the bigger body vehicles. Thanks Ivan for sharing!!
Nice Vet ,I was a member of a hunting camp in Half Moon PA . It’s nice down there.
Well done Ivan.
Love your channel. I can hit the like button even before I watch the video, because I know it will be informative and entertaining.
Thanks for your support, Lawrence!
I liked this one. I guess I never paid attention to the wiper systems on those vettes. That wiring diagram brings back memories though. I have a 1970 Monte Carlo that I've owned for 34 years and I looked at those diagrams a bunch in my early ownership years. My car has a similar wiper motor with the wipers that park below the edge of the hood. I've never had problems with it not parking correctly. I've had a lot of problems with the washer pump though and finally after several re-builds of it, I converted it to an electric version which while not stock looking, works 10X better. I can't wait for part 2.
Love your videos Ivan. Spot on diag. 99% of people would of seen draw on wiper motor and replaced it.
Yeah good luck finding a replacement! Probably costs a pretty penny...
@@PineHollowAutoDiagnostics You'd be surprised how easy it is to find C3 parts. Not always inexpensive, but at least everything is readily available.
@@PineHollowAutoDiagnostics Cardone $147.00 !
fix it up with a dorman...
Ivan you youngster. The 68 Corvette was a classic. You wanted the one with the 427cid.
317 kW / 431 PS / 425 hp
Great video.
This 327 is the low end. the great small block was the 327 L84. Rated at 375 hp
Small block is best for the Corvette...Big blocks were too heavy, handling and cornering went to crap.
Holy smokes. I thought my Crown Vic had a goofy setup, but this is on another level.
Can’t be much causing a drain on this old beauty 😂. This is back when they built them right
Except when it came to collisions
@@chadvalliere8697 Correct, or fuel mileage or engine longevity or comfort or.... the list goes on and on.... lol
@@inothome the new cars are just disposable junk !
@@andrewslagle1974 Thanks for your opinion. Good to hear you still drive something from the 70's. How many top ends and totals have you done to it over the years? Still easy to find parts?
Not to mention, how's that 6MPG doing, with maybe 100HP on a cold day from that finely tuned, reliable machine?
Very cool Diag.
Man, I have to comment again like some time ago. Great stuff. Thanks.
I saw that on the drive a couple if days ago. Nice to see it here.
A little adjustment on that micro switch threads if there are any and maybe the wiper transmission needs some lubrication at key points as any drag in the many pivot points would resist the system going to the park position. Also, there in the wiper motor housing is a nylon cam and gear assembly that works with a micro switch that controls the park system when turning off the wiper switch to position the motor stop point then park them. The micro switch/housing positions on the wiper motor housing and is constructed of plastic which sometimes deforms and causes the park feature to work incorrectly. There is a lever on this micro switch that rides on the nylon/cam/gear inside the motor and if the micro switch doesn't fit tightly into its position, the park feature won't work correctly. Lots of investigation is needed on those wiper functions as they are some crazy engineering going on in them. Might be some concerns with those switches under the dash too, especially the "override" one. BTW, good luck in finding an owners manual today that describes operations like that one. Thanks Ivan.
A parasitic draw is the closest Ivan gets to a Halloween-themed video....
Welcome back to pine hollow classic car diagnostic
Well done ivan :-D, Your diagnostics are always spot on.
So the wiper mechanics need lubing + adjusting so it will always park in a repeatable way.
Easy to say lol.
That madness of wires jumping about could have been thought out nicer, but never mind :-).
In 1968 the 300 hp was the small engine. They had 425 hp big block. The button on the door was 1 year only. The wireing harness was also 1 year only (too many fires).
Nice work.
Good job, it's great to see people that know there shit..
Common problems on that car include the electric clock, alternator blocking diodes, and the light in the center compartment behind the seat. Ask me how I know.
I had a friends late 1970's Grand Prix with a draw from the clock . It must have somehow back fed . With the clock fuse removed , still a draw . I physically had to remove the clock . I then took a baseball bat and sent the clock on a home run !
@@billsmith2212 Were the bases loaded? These clocks use an electromagnetic winder. When that winder winds the clock it draws several amps. Once the clock unwinds contacts fire the winder again. If the contacts fail, the clock draws amperage all the time. I've worked on a couple of cars with that clock problem draining the battery.
Garcansdad : The issue I had was with the fuse removed , the draw was still present . I finally removed the clock from the dash to stop the draw . There must be some way that can back feed and still draw current with the fuse removed .
@@billsmith2212 The clock fuse also powers the cigarette lighter. If there is still current draw with the fuse removed, another circuit is still powered. I've also seen corrosion on the back of the fuse box cause current draw with all the fuses removed. You might remove fuses one at a time with an ammeter on the battery cable. When the current draw goes away, you've found the circuit causing the problem.
Hoo boy! Nothing I like better than a parasitic drain!
This vette has an analog system not a digital system back when times were simpler.
My 1967 Cougar had a 396 cu/in engine with 365 HP from the factory. It was really quick and had no special markings. I ate up a lot of so-called fast cars with fancy markings.
I'm wondering if the wiper override switch is currently in the "on" position?
That was my first thought when he mentioned that.
@@russellhltn1396 Exactly.
But if it were on, meaning open, the motor would not be powered, and could not be drawing the 30W...
@@jovangrbic97 He conveniently forgot to mention he checked it and it's disconnected...wired straight to ground. Editing for views.
Very Cool Car👍
They changed that door handle in 1969. Also the steering wheel became interior color, with a glove pouch added. The 350 cu in 300 hp replaced the 327 300. That color is bright blue I believe. The batteries were vented through the fill caps and drained under the floor. The vacuum storage container held the headlights down until it equalized then one headlight would pop up. I had a 69 t top 350 in this color back in 1975.
Lemans Blue. Best Corvette color ever...
'How about that !?'very curious system..👍
Since Ivan touched it it goes up another 10k in price ;)
Like reading a good Agatha Christie novel. Love it 👍
That is the thing with old cars, turn the ignition off and there is nothing to drain the battery, if you remember to turn the lights off that is, the only thing left running might be a clock.
Even on later cars, only the memory of a radio would be running at best, unless extras were added, but even then, when you turned off the car they usually went dead.
Around 1973 , possibly earlier on Cadillac , the alternators with the integral regulators had a draw with the key off . Most shops were completely out to lunch with ANY electrical diagnosis . Between 1970 to 1980 , I worked at a rebuilder . Very few shops had a DVOM or even an analog meter . Most had NO battery tester . I NEVER heard voltage drop spoken by anyone ! No shortage of cavemen working on cars . And most signs advertised EXPERT Auto Repair !
Cavemen : I went to the salvage yard for a used battery and took my Milton load tester ( toaster ) . They laughed ! Their method : TIRE IRON - short terminals - no spark , bad . Little spark , weak . Big spark , battery good ! I guess they learned that at MIT !
@@billsmith2212 Big flash over, very good battery!
@@billsmith2212 "EXPERT Auto Repair !" They said nothing about the electrics, though!
Old tech can sometimes be more complicated then the new stuff lol
Corvette parasitic drain, it's a tradition that's passed on for generations. 😁
Of course another Chevy in the shop. Beautiful car though. One of my favorite is the 1958 Corvette.
GM was big on concealed wipers and I wouldn't be surprised if that was their innovation. Every 77-90 B-body for example had concealed wipers that parked themselves just under the trailing edge of the hood (no power cowl needed). Don't forget, we landed on the moon a year later so this was not the height of complexity for engineers even in 1968 or whenever this wiper system was designed (early 60s even?).
Loved the look
Oh boy good Halloween treat
gotta love those old wiring diagrams. thats the way they were in the books. if you got lucky you got a one piece fold out. you think thats bad try a lincoln towne car!!!
COMPLEX AND LOGICAL SYSTEM MET ITS HIS OWN MATCH, " A PROFESSIONAL DIAGNOSTICS TECHICIAN" THAT IS BLESSED WITH HIS APPROACH AND ABILITY TO DO A GREAT JOB.
WE ARE BLESSED TO HAVE IVAN HELP IN OUR AUTOMOTIVE FIELD. THANKS A MILLION.
You need a professional technician to service your CAPS LOCK.
Those older gm wiper systems would do that when the park mechanism wore out that is attached to motor, I used to swap parts to make them work
About the clock - clocks of that era were not a constant power draw. They were mechanical wind-up clocks. You'd have a power spike every 30-60 seconds as the clock wound itself, but absolutely zero power draw otherwise.
huh that's cool!
What a sweet looking ride. I was born when that car was made. Too bad Honda makes a minivan that has more hp, is faster, and will do the slalom safer than a 70's muscle car. Wow, have times changed.😕
Yeah, but no matter the numbers you’d still be driving a Honda minivan at the end of the day
If it was one or two years older it would be worth 3 times what that 68 is worth! Ivan is a wirering genius 👌
I like the 1963 327 fuel injection, automatic trans with air conditioning the most. Rare item, split rear window made just one year.
If it was five years younger and a split window hardtop .....
@@bryanlatimer-davies1222 63 split window 👌
@@Garth2011 One of my friends had a green 63 split window ! Those were the days
@@natal777 Thats my favorite legacy Vette and my favorite newer body is the C7 Grand Sport...Automatic
My Cadillac cts had a drain one of the reasons they sold it. I found that the trunk light was always on. They put in a new battery but took a week and it would go dead. So I took out the bulb and now can let it sit for months no problem.
Yes we want to see the fix.
I believe it was the 73 GTO big block had cowl induction, total gimic but undeniably Cool, back in the day for a real hot rod, still quite but set you back in the seat fast
I had a 68 corvette. It had a 427 and a 4 speed.
With big ignition off drains on old style cars unless there aftermarket garbage fitted usually comes down to either the alternator diodes or the wiper circuit.
Now this is a better view than True Detective!
🧐
Every Chevy I've had that problem with was 1 of 3 things starter, alternator, or positive battery cable
Constant 40 watts of energy was being consumed will be interesting to see if the wiper motor windings survived hours of current .
Those C3s with chrome bumpers are worth $$. That's a very unusual wiper setup. Most cars back then just had a rather large gap between the cowl and windshield and the wipers "hid" down in the gap. Hence, hidden wipers. The Vette took that a lot further it seems.
I've done quite a bit of work to a friend's 59 Corvette. I feel your pain on the "bed sheet" style diagrams. Luckily the cars are much simpler.
Like the "Bed Sheet" description. 👍
Amazing
Wow 68 Vette! That's real beauty!! That's real old school gm right there, nothing with plastic shit or anything, it was built with love and for guys going to the moon, that's real classic! Wow, not in parked all the way, big 3 Amp draw! Dang. At least you'll find NPR fixes, i bet the micro switch and contacts have crusties or dirt on contacts, awesome video!!
Are we gonna see the part 2 of the cruze?
Cruze was here just for diagnostics 👌😁
@@PineHollowAutoDiagnostics ah okay :)
Seems like the manual override switch might be in the On position, which I guess would keep the motor from parking.
Just wait for Part 2...