Has anyone replaced the electrical harness on an C4 1984. I think that I have electrical problems. Blake lights, blinkers quit working, The windows do not go up or down and wipers do not work. The worse problem was that I was driving today and the car keep stalling. After letting it set and having to take a charger to it I could crank and run alittle but quit again. Ichecked the glass fuel filter I put on and when it quit I did not see and gas. After letting it set I would turn the key and check the filter it was full of gas. I either have a fule pump problem or a short shutting fuel pump off.

Any ideals or has anyone replace the electrical. PS If I let the car set a few days I have to charge the battery. :mad

 

:rolleyes: Sounds like the fuel pump is a symptom, not the problem!..

With all the other things not working either, it sort of souns like you have some or maybe just one bad ground connection

I am not an electrical guru, but unless rodents have chewed through your wires and assuming the fuses are still in and not blown, sounds like bad ground(s) to me.

On my 88, there are some common ground terminals behind the battery and there are others as well, like I said, I am not an electrical guru! I would try to find and clean and tighten the grounds

Hope that helps! If not I have given you a bump to the top!

:seeya

:steering:

 

:iagree: Always look for the simple stuff. It's unusual to have multiple failures, you always look for the common thread. Good luck!

 

It would be FAR less work finding the cause of each of your problems rather than replacing the cars wiring harness!!!!
First check the fuses for the stoplights, and wiper. The power windows has a circuit breaker.
When the battery is charged, remove the negative cable from the battery and place an ammeter (VOM test meter set to amps) in series between the battery terminal and the neg cable. After the courtesy lights time out, reduce the full scale amps on the VOM so you can read the leakage current. GM says that leakage should not be higher than 50 ma. (milliamps). If leakage is excessive, remove the fuses one at a time and watch the ammeter for a dramatic drop in current. The circuit this fuse protects will need to be investigated for the leakage current cause. My 87 vette has 27 ma. of leakage.
Engines need fuel, air, spark (and spark at the right time) in order to run. You need to measure the fuel pressure on the shrader valve on the end of the fuel rail to see if your engine quits because of fuel pressure loss. Check for spark with a timing light and check for the correct timing setting. Put a low powered 12v lamp across the injector harness plug and crank the engine. The light should pulse when the engine is cranked.
Buy the GM service manual and the electrical diagnosis manual so you know what is in your car and can perform the diagnostic tests to repair your car.

 

Were can I get a service manual, or has anyone use the CD factory repair manual from ALLDATA that you can get from Autozone on the WEB. Which one would be the best to get. :confused: