1987 Chevrolet pickup Temp Gage Stuck in high or low temp DIY
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- Опубліковано 5 жов 2024
- 1987 Chevrolet/GMC pickup truck Temp Gage. Reading / Stuck in high or low temp.1967,1968,1969,1970,1971,1972,1973,1974,1975,1976,1977,1978,1979,1980,1981,1982,1983,1984,1985,1986,1987.Chevrolet & GMC
Pick-ups. Most parts can be found at Chevy/GMC dealers in their old stock so check there before going on line it may save you a buck. - Авто та транспорт
mine was reading low helped me locate problem the green wire was I guess melted off near the exhaust pipe so I got wire and spliced it back together and connected it works great thanks for the help.
Nice work!
Well after trying three different ones I finally found one that works
Much appreciated for your information
Three sounds like junk yard parts ---what a trooper to stick it out but when you need a gauge you need a gauge. Glad I could help God bless.
Thanks, I have the same problem on my K5 after removing the cluster to install white gauges and paint my needles. The temperature gauge was working fine prior to removing it but when i put back together i had this very same issue. Will order a new temp gauge from LMC today.
You bet God bless
Thanks for the information and video.
You bet
thanks , mine reads low then high
thanks
I'm looking to "upgrade" my 1987 Custom Deluxe idiot light instrument cluster to a Silverado cluster like yours.
I've been told I simply need to change out the sensors (switches) at the block and the oil and temp gauges will work.
I've found my oil pressure sensor. But I'm not sure where the water sensor is?
I have the switch in the driver's head, but also have a sensor of some sort adjacent to the thermostat housing in the intake manifold. Is that what I need to change out to make the factory gauge work?
www.pinterest.com/bradleemize/73-87-chevy-truck-wiring-diagrams/ 👉forum.73-87chevytrucks.com/smforum/index.php?topic=11766.0
I got an 86 k20, and the guage never worked. Checked the sensor and it was unplugged. Found the plug for it and clipped it on and still nothing. Only had truck running maybe 10 minutes and never rased up at all.
Wire from switch could be broken somewhere but first follow procedures at end of video how to do resistance check on switch left side of engine drivers side shown on video.If switch is good check switch wire may be broken //scroll to page 6 67-72chevytrucks.com/vboard/showthread.php?t=442311 //// if this does not work you need to check gauge -works for me
I have an 87’ R10, But the engine is probably a 78’ 350 Small Block. Anyways, my temperature gauge stays stuck at 0 24/7. Just wanna prevent another Blown head gasket if he overheats again.
Follow the steps in the video--- works for me--- or just go get an aftermarket temp gauge if do not trust GM's finest offerings to the table //// . they sell a three gauge set at Harbor Freight for Around twenty dollars ---a friend of mine has had the HF gauge set for 9 months no problems and we are talking bottom of the barrel cheap gauges and it ---works for him. (the link for that ) www.harborfreight.com/electronic-triple-auto-gauge-set-41017.html Hope I helped God bless and God bless America.
awsm info!! lol my gage is always stuck on 250 (hot) I replaced both temp sensors (mine has 2) and gage was still on hot...pulled the cluster face off moved the needle to cold turned the key n it moved back to 'hot' so now im gunna do what u did flip it n see wut happens....someone told me to check were the gage ground is at but I wasn't sure were its located from the gage to 'were' ill check mine tommrow awsm info tho thanks!! (I have a 89 gmc 4x4 suburban) gotta fix the trip meter also its stuck...but I need to fix my temp gage so I kno if my thermostat is working or not...
You bet .Good luck with the trip meter even the ones in the junk yard are broken.
thanks. this really helped
+Carlos Quinones Your welcome.
I think you may have just proved that the gauge was good and the resistor was (open) no good. Before anyone replaces their gauge, you need to check the resistance between the two pins with an ohmmeter. Usually GM gauges are 90ohms But I think the temp gauges are less then 90. If you have a very large (open) resistance that is the problem. The resistors are hard to come by and I dont know the wattage rating, but you may be able to find one on a less attractive gauge that you might swap in...
Nope - the gauge was bad - Works for me God bless
So there's a temp sensor of some sort in the thermostat housing that's not connected to anything or i believe it's a temp sensor...there's no wire visible running to it and i would like to know what it connects to ....plz help
Left side of engine block (drivers side) below spark plugs mid engine block you will see this on video.
I believe that was for emissions. It was probably disconnected .
i have a question with my vehicle running cold in the winter - instead of getting a new thermostat is it safe to cover part of the rad up with a bag and just keep an eye on the guage cause without the bag it will warm up to a couple notches below the quarter mark but if I drive on the highway for long it will go all the way down - since I covered part of the rad with a bag it stays at a quarter now I think it's okay I'll just have to take it out when it starts warming up
Covering the grill on any vehicle is self taught and different with every vehicle. WATCH that gage because engine damage can occur with covering the vehicle grill and not unzipping it at the proper time. Best is talk to your seasoned and area related auto technician or parts shop for best answers and results. Good luck my friend.
I have a 1986 gmc jimmy ..they swapped engine for a 350...wire was unhooked..single wire ...I hooked it up ..it pegged out ...replaced temp sensor on drivers side ..same thing ..did they sell me an idiot light sensor? Or do I need to start testing other stuff
that could be /Example at Autozone website there is usually a nomenclature below the item saying like (for analog gauge)
@@MBJREPORT I have another Suburban I pulled the gauges out of it apparently it's my gauges bad
You are so lucky to have a test donor vehicle on the side / so glad you figured it out gauges take up so much wasted time while everything else is busy breaking LOL
I have same yr model and bought a set of sun pro gauges aftermarket, my question is after installing them im now left with the wires hot/ground on the back of it so would someone lend me a hand and let me know where the heck i should hook these to ?? Thanks
This is all I could find. Sunpro Gauges Installation
www.carid.com/images/sunpro/custom-gauges/pdf/cp7955-installation-instructions.pdf
Just to verify, my temp sensor wire is disconnected from my temp sensor and when you turn the key the temp gauge maxes over 260 degrees. Are you stating that the gauge is bad? Temp sensor and temp switch are those two different sending units or is that just the one sensor on the cylinder head. Reason for so many questions cause I swapped original small block for a big block that I built to replace it and had to swap all original sensors for new ones.
temp switch which feeds temp gauge signal in resistance form is on driver side of engine block on the video.
temp sensor is on top of block front towards water pump connection that sends information to ECM.
Thank you for the quick response, I decided to go a different route and install temp and oil pressure gauges from auto meter with all new wires instead. The engine I built is making over 5 times the hp then the original 305 sbc and would not be logical to trust stock gauges. Thank you for the helpful video.
Whats the thing next to it the sensor or something i got a 305 an i think its a temp sensor i need but i cant find the right size
Temp switch is located on driver side engine block for analog gauge.
Temp sensor is on top forward part of intake manifold that sends info to ecm only not for gauge. Temp switch looks like this for 305/350 www.summitracing.com/parts/ado-g1852?seid=srese1&cm_mmc=pla-google-_-shopping-_-srese1-_-acdelco&gclid=CjwKCAiA45njBRBwEiwASnZT53UgpcOOWnd1Q46_lfakxImj6z2Zu83y0bcjN6vLyb-cRRgSxZz3zhoCEt0QAvD_BwE
My oil pressure and coolant temp are pegged out with new sending units
I have seen this before in my truck a wire from the ECM and panel board the gauges are sitting was
grounded. I hope this may help you 1987 Chevy Truck Ecm Wiring Diagram
wiringdiagram.2bitboer.com/1987-chevy-truck-ecm-wiring-diagram/
I have a 1985 C20 with the 305. The coolant temp gauge is pegged in the high position with the truck on and off. I have replaced the gauge itself and the sending unit in the motor but the new gauge still is stuck in the hot position. Any suggestions? Thanks
All temp gauges should start cold and rise as engine temp increases. 1. Check voltage at wire going to switch on engine block should be 12 volts dc some as low as 6 volts also any thing below that bad feed (always check a manual like chilton wiring in the back of the book to give the feed for your model). 2. If that is good take resistance check on switch it self with one lead on switch and the other on a good ground take reading on cold engine and hot engine readings should vary ...if not switch is bad... if it does vary resistance then the gauge is at the beginning of going wacky after all these checks . Good luck.
Hi man , i ´ m a guy from France 🇫🇷 owner of a 6,2 diesel chevy van G20 , my problem is that when i turn the key to start , the gauge temperature goes very kwickly to the max , and the motor is cold , even if i try to move the gauge , she come back again to the max , if i switch off the key the gauge stay at the same place ( maximum) but i can move the gauge where i want and stay a the place puted . Can you help me ?? Thanks in advance ..
chevroletforum.com/forum/express-g-series-vans-30/chevy-van-g20-coolant-temp-74690/
Mỹ 86 temp gauge does move and stays around 110, it no longer goes Higher thân thật as it normally did before. Any thoughts?. Thanks in Advance
All temp gauges should start cold and rise as engine temp increases. 1. Check voltage at wire going to switch on engine block should be 12 volts dc some as low as 6 volts also any thing below that bad feed (always check a manual like chilton wiring in the back of the book to give the feed for your model). 2. If that is good take resistance check on switch it self with one lead on switch and the other on a good ground take reading on cold engine and hot engine readings should vary ...if not switch is bad... if it does vary resistance then the gauge is at the beginning of going wacky after all these checks . Good luck.
MBJREPORT Thanks again. The issue was the temp sensor on the driver side . Temp gauge operating again.
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thank u
+Austin Redhead your welcome
+MBJREPORT Check out my channel there is more than automotive. You should enjoy.
would you know where to buy a new Guage mine does the same thing
E- Bay ,Rock Auto ,or oem CALL AROUND old Gm dealers part dept. sometimes they have NOS
the wire is connected but gage still the same doesn't move
Sounds like temp switch is bad check resistance cold and when engine hot compare results if resistance is the same the switch is bad. this check is explained online and a chilton manual.You need a meter also.Good luck.
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Where did you find the sending unit?
Left side of engine block (drivers side) below spark plugs mid engine block you will see this on video.
I have an 1985 Chevy C20, The original temp gauge I had was stuck in the high position so I replaced the gauge. Even after replacing it, the new gauge is still stuck in the high position. Any ideas of what to check next? Thanks for the video.
All temp gauges should start cold and rise as engine temp increases. 1. Check voltage at wire going to switch on engine block should be 12 volts dc some as low as 6 volts also any thing below that bad feed (always check a manual like chilton wiring in the back of the book to give the feed for your model). 2. If that is good take resistance check on switch it self with one lead on switch and the other on a good ground take reading on cold engine and hot engine readings should vary ...if not switch is bad... if it does vary resistance then the gauge is at the beginning of going wacky after all these checks . Good luck.
MBJREPORT
But wheres that wire go to
one goes to the switch on the left side of the engine block (drivers side) that the gauge reads the resistance from
MBJREPORT Scary Funny Haunted Channel & More ty man imma cueck it out an see what i get i been trying to get mine working bc i had to put a motor in an wire everything back up ty
Motor swap is a process /take pictures of engine all angles before/during /after ---tape label everything before start --- makes life much better less problems good luck God bless (works for me) and by a good tech manual if you can on specific vehicle
under the hood what color wires are for the temperature sensor
If you are talking about the coolant temp sensor it is a pigtail connected to the sensor by the top radiator hose forward of the TBI colored yellow and black wire(s)this feeds your ECM info.
If you are talking about the temperature switch left side (driver side ) of the engine block it is dark green like the video this wire feeds the temp gauge.
Your welcome.
hi