✇ Tachometer: How To Install Wire or Replace : Half Idiots Guide
Вставка
- Опубліковано 29 жов 2013
- www.TheBurban.com
/ 76suburban
How to install or replace a tachometer (tach). We replace a stuck tachometer in our 76 K25 GMC Suburban. (With a/c). No matter what vehicle you are installing or replacing a tach in, the basic wiring is the same as in this video.
Tachometer info:
Tachometers or revolution counters on cars, aircraft, and other vehicles show the rate of rotation of the engine's crankshaft, and typically have markings indicating a safe range of rotation speeds. This can assist the driver in selecting appropriate throttle and gear settings for the driving conditions. Prolonged use at high speeds may cause inadequate lubrication, overheating (exceeding capability of the cooling system), exceeding speed capability of sub-parts of the engine (for example spring retracted valves) thus causing excessive wear or permanent damage or failure of engines. This is more applicable to manual transmissions than to automatics. On analogue tachometers, speeds above maximum safe operating speed are typically indicated by an area of the gauge marked in red, giving rise to the expression of "redlining" an engine - revving the engine up to the maximum safe limit. The red zone is superfluous on most modern cars, since their engines typically have a revolution limiter which electronically limits engine speed to prevent damage. Diesel engines with traditional mechanical injector systems have an integral governor which prevents over-speeding the engine, so the tachometers in vehicles and machinery fitted with such engines sometimes lack a redline.
In vehicles such as tractors and trucks, the tachometer often has other markings, usually a green arc showing the speed range in which the engine produces maximum torque, which is of prime interest to operators of such vehicles. Tractors fitted with a power take off (PTO) system have tachometers showing the engine speed needed to rotate the PTO at the standardised speed required by most PTO-driven implements. In many countries, tractors are required to have a speedometer for use on a road. To save fitting a second dial, the vehicle's tachometer is often marked with a second scale in units of speed. This scale is only accurate in a certain gear, but since many tractors only have one gear that is practical for use on-road, this is sufficient. Tractors with multiple 'road gears' often have tachometers with more than one speed scale. Aircraft tachometers have a green arc showing the engine's designed cruising speed range.
In older vehicles, the tachometer is driven by the RMS voltage waves from the low tension (LT) side of the ignition coil,[2] while on others (and nearly all diesel engines, which have no ignition system) engine speed is determined by the frequency from the alternator tachometer output. This is from a special connection called an "AC tap" which is a connection to one of the stator's coil output, before the rectifier. Tachometers driven by a rotating cable from a drive unit fitted to the engine (usually on the camshaft) exist - usually on simple diesel-engined machinery with basic or no electrical systems. On recent EMS found on modern vehicles, the signal for the tachometer is usually generated from an ECU which derives the information from either the crankshaft or camshaft speed sensor.
Our interests also include: K25 Blazer, Chevy Suburban, C10 Chevy, K20 Chevy, K25 Chevy, Chevy 4x4, Ford F-150 4x4, F-250 4 x 4 , F-350 4 x 4, C2500 Medium Duty GMC, General Motors, Chevy Big Block, Chevy Small Block - Авто та транспорт
Nice rig! Excellent video! I haven’t found another that explains it simply like that, thank you for taking the time. I’m working on a ‘78 crew cab that has a factory tach not working. Now I know where to trace the wires.
Wow someone actually keeps there truck clean. Thought I was the only one.
Thank you for sharing 👍
Happened to find one of these tach and mechanical oil pressure gauge clusters in a 77 K5 at the junk yard a while ago. Can't believe how hard it is to find parts for them. Even LMC has nothing on these aside from the gauges themselves. The cluster housing and printed circuit board is completely different from the 78 and up clusters so you couldn't swap in a tach even if you wanted to. Going to re-pin the connector in my 86 K5 and drop the tach cluster in there.
Clean truck thanks that is going to help with my conversion
Hey brother, on your fuse block, white is plugged in above where your tach harness plugs in?
What stereo do you have in that burb?
Hoal friend that good video, I congratulate you I am in Mexico and I would like to know if you could help me to conserguir a board like yours that marks (RPM)
How hard is it to install a Tac in a 82 k10 that has the large fuel gauge and not a tac?
Great question... we haven't actually done it, but we saw this guy's vid(ua-cam.com/video/ftKiP7Kyn9A/v-deo.html) a while back and seems correct. But please check it out for yourself. All installs are different as you probably know.
I need to do this to my 73 k20
Could have just taken the lights out instead of cutting a $150-200 printed circuit 🤣🤣🤣
lets say you have a 1991 suburban and you want to add the tachometer where it is on your model is there a way to relocate the fuel gauge and add the wiring for the tachometer so its inside the original bezel and not slapped on top of the dash?
yes there is way, look at the video brothers truck made and you can get the conversion from brotherstruck with the tach and small fuel gauge ua-cam.com/video/3Z_JY1RhGUc/v-deo.html
@@ImJoeTheCeo Hello, please, are these new pieces available and how much are they priced?
@@asds5067 idk, you have to go to the website of brotherstruck. i think the conversion is like 100-200 US dollars
Why replace the wireing harness if it's the same and good condition?
Ours wasn't good. Someone else had gone in and messed with it. All hardened and corroded.
What happens if you car was never originally equipped with a tachometer though?
SirSlaughter357 Everything is exactly the same except there's not a place in your dash for a tach, so you'll get an aftermarket Tach from say, AutoMeter, and attach it to the dash or steering wheel... or wherever is good for you. All the wiring will be the same as in this vid. Thanks for watching!
you gotta get a pop filter for your mic dude
RANDOM MAN SH... stuff.
Why are these things so F***g expensive, they're made cheap in China, for Gawd's sake