electrical issues

  1. S

    AC controller not working, 97 Sierra C1500

    hello! I recently (today lol) just got my 97 C1500 running, and I'm hitting some snags when it comes to electrical s##t in the dash. - the air only comes out at the feet, and only when in OFF position. any other position and it's off. - defrost light works, recirc and ac lights do not - seems...
    • sneekisnorkle
    • Thread
    • ac/heater electrical issues interior electrical newbie problem
    • Replies: 0
    • Forum: Electronics
  2. J

    Electrical Gremlin in the headlights, turn signals/ hazards area

    Recently got a 90 GMC 1500 with the 5.7. had some front end damage but only cosmetic. The stop fuse blew immediately, I noticed upon getting it home that it was. I replaced the flasher with a heavy duty L552 and a new turn signal flasher relay also able to function with LEDs. I had normal bulbs...
  3. A

    Battery Arcing

    I replaced my stock alternator on my 1988 GMC K1500 with 350 TBI with auto transmission after the plug melted to old alternator and wire melted in half. I replaced the stock with a 1 wire Power Master 140 amp alternator, Part # 47861, setup. I bought the proper charge wire according to Power...
    • acespectra30
    • Thread
    • #electrical 350 tbi electrical issues electrical problems
    • Replies: 1
    • Forum: Electronics
  4. Rust

    Dimmer switch issue

    Hi guys, I’m making my first post here and was wondering about if anyone had any solutions to my problem. I have a 1989 k1500 and every time I turn my headlights on my gauges work just fine BUT when I turn my dimmer switch even a little bit. All hell breaks loose on my cluster, temp gauge...
    • Rust
    • Thread
    • electrical issues electrical problems i need help interior electrical
    • Replies: 22
    • Forum: Electronics
  5. C

    Electrical Gremlins – Brake Lights, Locks, and Blinkers Out (’97 GMC 1500 5.7L)

    I’m chasing down a strange electrical issue on my 1997 GMC 1500 (5.7L V8) and could use some help... Here’s what’s happening. Brake lights don’t work, Power door locks don’t work, Turn signals don’t work, Hazards don’t flash, but when I press the hazard button the blinker lights come on and...
  6. O

    Slow crank no start

    93 Chevy 1500 with a 350. Put a cam in it, got everything back together. Whenever I try to start it cranks slow 1-2 times then loses power. If I hold the ignition for more than a few seconds wires start to smoke. Replaced battery, terminals , and still the same thing. From what I can see the...
  7. Aaron55

    Wiring issues!

    Hello, new to the forum and new to working on OBS trucks. I recently purchased a 1989 c2500. I have been fixing it up and have been meaning to get around to working on the check engine light. I tried shorting the A and B terminals in the proper fashion to see what I could pull from the flashing...
    • Aaron55
    • Thread
    • electrical issues obd1 service engine soon wiring wiring diagram wiring help
    • Replies: 40
    • Forum: Electronics
  8. F

    98k1500 weird electrical problem check it out

    This one is a tough one I've been a mechanic for 30 years and never have had a problem figuring out problems this one has me stumped. I have a 1998 K 1500 5.7 4l60e 4x4 last year I converted and rebuilt the engine to carburetor .the 4L60E worked off of the tachometer on other signal along with...
  9. KCusick81

    Fuel pump? - Results of electrical testing at fuse box - What does this indicate?

    Good evening all, I'm in need of some help diagnosing the latest issue with my 1997 K1500 5.7. How it started: About a week ago, I was driving my daughter home from school. I stopped at a stop sign and my truck shut off. No spitting or sputtering. No warning, just shut off. The truck would...
  10. westcoastZ71

    High beams only work on right side

    Hey everyone, Just got my first GMT400 truck, a 1995 Sierra 1500 Z71, so I don't really know my way around these. My left side high beam doesn't turn on, even after I replaced the bulb. The right side and dash indicator both work. Has anyone else dealt with this, or is there a specific failure...
  11. L

    89 c1500 dead electronics update?

    If you see my previous post, I’m updating about my electrical issues. All fusible links are getting power at the junction box/ fuse in engine bay, It was tested with a Test light. And of course, all fuses are working too. But I have found something suspicious. I found a broken ground strap under...
    • luvmychevy22
    • Thread
    • 89c1500 electrical electrical issues grounding spots
    • Replies: 0
    • Forum: Electronics
  12. H

    Speedometer is erratic, especially in the cold

    I have a 1994 Extended Cab Silverado that I recently replaced the gauges in with AutoMeter gauges. All other gauges work perfectly, except for the speedometer. It is extremely crazy in the cold, even moving while in park, if I press the throttle. When the day gets warmer, while going around...
  13. L

    Almost all my wiring went out randomly

    I needed some advice about electrical issues in my 89c1500 about a week ago almost all the electrical went dead I don’t have a radio. I don’t have headlights. I don’t have the cigarette lighter. I don’t have interior lights. I don’t have dashboard lights or even the horn. The wiring harness...
  14. lukemskinner

    Driver side brake light stops working intermittently

    I just bought a 1988 Silverado long bed. Was driving it home from the in-laws house on New Year’s Eve when the service engine light came on and I wasn’t sure why. I got pulled over not two minutes later and they said my driver side brake light is out. So next day I turn the truck on and test the...
  15. D

    new wiper board = no wipers, old board = wipers work high only?

    Hey guys sorry for creating yet another wiper thread but i've searched online everywhere and cant find any issues like mine. 1994 silverado k1500 When i got the truck the wipers worked on high only and they didnt return properly, so after some research I figured new wiper pulse board would...
    • DFINEfab
    • Thread
    • electrical issues pulse board wipers
    • Replies: 9
    • Forum: Electronics
  16. Dub1990C1500

    Truck dies every so often, only after being turned off.

    I have a 1990 C1500, I’ve done a good bit of work to it but not a whole lot on the electrical side. Been driving it for almost 2 years with no big issues. Over the past 8 months or so I’ve had a good few breakdowns. First time I completely stalled out at a red light, truck was completely...
  17. 96k1500extendo350

    Audio system electrical issue or bad ground ?

    I’ve recently come across with a problem with my speakers and stereo which had recently only happened when I had to get my motor pulled out by a shop to get it fixed.Recently my stereo would always keep turning off and on and would not stay on, only in the morning but probably for like a few...
  18. Fobra

    No power to passenger front window switch

    Trying to chase this issue for the passenger front and driver rear windows on my 96 Yukon SLE 4Door. None of them are getting signal power. The power locks work. When I try to use the master switch, it sends out voltage to the signal wires but they still don’t go up or down. I’ve tried checking...
    • Fobra
    • Thread
    • diagnostic electrical electrical issues power window switch power windows wiring help wiring issues
    • Replies: 3
    • Forum: Electronics
  19. Fobra

    Power door lock illumination constantly on

    Having a couple issues regarding about my power windows and the passenger front power door lock illumination being constantly on. So at the moment the passenger front and driver rear windows don’t work. I bought a new switch for those doors and the passenger front door lock illumination is...
    • Fobra
    • Thread
    • diagram door lock electrical issues power window switch wiring wiring help
    • Replies: 2
    • Forum: Electronics
  20. Fobra

    Door harness issues

    So I bought a 96 Yukon 5.7 4 door not too long ago. When I bought it, none of the power windows work along with the speakers in all of the doors. I have already checked both fuse boxes and none of them were blown and verified current in all of them with a volt meter. Since the front windows were...
    • Fobra
    • Thread
    • electrical issues harness power windows speakers yukon
    • Replies: 0
    • Forum: Electronics
  21. Steel

    1997 Silverado 5.7 Electric Issue

    Hey everyone. I just bought a 1997 Silverado Z71 with 120,000 miles from the original owner. Needs some work as it hasn't ran in about 2 years. (But got it for a great price) and I've been working on it but one issue I have come across is electrical. I got a new battery. Truck fires right up...
  22. SR104

    Ignition key chime

    Hey everyone, this is my first post so take it easy if I make a mistake somewhere… but down to the issue. I got my OBS a while back and it had no door chime/key chime module in it so I put one in from a Camaro of the same era from eBay. the door chime, key chime and rapid chime for the lights...
    • SR104
    • Thread
    • chime door chime electrical issues key chime
    • Replies: 36
    • Forum: Electronics
  23. G

    Passenger Tail/Brake light out Intermittently

    Hello everyone! So I have owned my current 98 GMC Sierra C1500 for a bit over a year now. Few months back I had each brake light and tail light stop working randomly, which was fixed when I replaced the two rear tail light circuit boards. (Example of part) The problem seamed to go away for 3...
  24. P

    Brake light trouble

    So this problem just randomly started, I have a 1994 c1500 base model. My brake lights don't work when my headlights are off, but my brake lights stay on when my headlights are on. All my blinkers and other light functions work, just my brake lights. For a little further explanation, you know...
    • Pos94obs
    • Thread
    • brake light problem electrical issues
    • Replies: 8
    • Forum: Electronics
  25. B

    Ac heat wipers radio lights etc only work 1/8 of the time

    Ac heat wipers radio lights etc only work 1/8 of the time does anyone have any ideas I've torn apart the dash replaced fuses but still only works when it wants to.

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