wiring help

  1. I

    OBDII reading speed wonky

    I have a 1996 c1500 4.3l vortec 4l60e. Me and shop have been working on an 6.0 ls swap and matching 4l60e. We had a custom engine harness made for this project and we are using a terminator X. The big problem we are having is that when the tuner connects to the OBDII, and drives the truck, the...
  2. TylerMeyers

    Electric issue

    I have a 91 k2500 350 tbi. I’m having this very strange issue when the truck is both on or off where if I’m using electrical components like headlights turn signals power windows, power locks, radio, heat any of that it draws to much voltage and will drop my gauge and will try to stall the...
  3. Chillracket733

    93 pcm and wiring harness swap

    Hey this is my first time posting but I need some help! So I recently bought a 1993 single cab that 4.3 v6 Manual well it was originally Manual. The person I bought it from kept all the manual parts even the clutch pedal. But I bought the truck because I got a 94 c1500 350 sbc that I’m 6.0...
  4. Y

    Aftermarket radio head install

    1994 GMC K1500 Suburban SLE stop every video I’ve found online for new radio heads are in the Silverado not the suburban which is what I have. I’ve removed the amplifier and I’m routing the cables up for the new radio head when I realize I don’t have a cable that most people have. I have the...
    • youtoo55
    • Thread
    • radio sound wiring help
    • Replies: 4
    • Forum: Audio
  5. wolfwaggy

    98 silverado harness swap with 98 suburban ...now no brake light and no relay in 98 suburban harness..???

    My 98 Silverado. 5.7 Z71 4wheel auto . my harness melted on the egr pipe. I replaced the harness from a 98 Tahoe. I didnt notice that the Tahoe fuse block didnt have a brake light relay untill after I installed it. I have turn and flasher and park lights...no brake light but the cab brake light...
    • wolfwaggy
    • Thread
    • wiring diagram wiring harness wiring help wiring issues
    • Replies: 0
    • Forum: Electronics
  6. J

    Mystery Wire + Glovebox Wiring

    Hey all, Before I have an aneurysm trying to read some wiring diagrams, anyone know what this red wire is off the top of their head? Also what is the function of this wiring going off the top of my ecm to this box in my glove box? 1991 Chevy K1500 350 TBI 4L60 ECM Part #: 1227747
    • Joshg43
    • Thread
    • mystery wire wiring wiring help
    • Replies: 10
    • Forum: Electronics
  7. Pswaydoe0

    Missing Timing Advance Wire 305 TBI 94

    I've been replacing parts on this truck and restoring it and there was a lot of aftermarket splicing into the wiring harness. I finally got everything to work the way it's supposed to but it was running like crap after I invested money into replacing all the parts dressing the engine. I just...
    • Pswaydoe0
    • Thread
    • #restoration engine timing someone help wiring help wiring issues
    • Replies: 10
    • Forum: Electronics
  8. ImSoHappy

    PCM to convenience center

    Howdy all I am working on my 1989 k1500 full Holley sniper efi cut out the pcm way back in the day thinking I could wire around it (turns out not a chance ) I have thrown in another pcm got the harness with all the wires cut I have connected everything that only has one wire to match the...
    • ImSoHappy
    • Thread
    • big block holley sniper efi k1500 wiring help
    • Replies: 0
    • Forum: Electronics
  9. 97 Suburb Raven

    Right turn signal operates brake lights

    So i have an odd one cant seem to find answers. So before i changed the tails and turn signal stock i had many issues with the turn signals and brake lights. after i changed the stock and interrupter one issue persisted the right turn signal operates the brake lights making them flash, then when...
  10. 2s3sand4s

    95 half year VSS/VSSB wiring diagram help

    Precursor: I have looked at the diagrams in the manual mega thread, and it doesn't seem to match what I am looking at in the truck. The truck came from the factory as a 1995 Chevy K1500 standard cab long bed w/ NV3500 and 305 V8. I am trying to understand the VSSB/DRAC situation on this...
  11. A

    98 5.7 vortec swap into 1996 k1500

    I have a 1996 Chevy k1500 that had a 4.3 vortec v6 with an nv3500 behind it I pulled the v6 out and put a 5.7 vortec v8 with the wiring harness and ecm from the 1998 Chevy pickup it was pulled out of. I got everything hooked up and ran wires to the starter with a button start it there’s no codes...
  12. 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
  13. LoveMyHoe

    $50 To anyone who can provide diagram to wire this switch to my seats!

    Good Morning all! This is my first post, but I have been using this forum quite a bit for my 2-door build. I have been struggling with the wiring for the new seats... I have acquired seats from a 2014-2018 Tahoe/Suburban and I was able to figure out the front seats and jump seat/console and am...
  14. tppower

    1989 C1500 Standard cab dome light wont turn off

    Hi everyone, i have seen this problem on the forum in different ways for the last few years but none of the solutions work, and i also have a unqiue situation. I have had my first car, a 1989 c1500 standard cab Silverado step side me and my dad fixed to working condition, and I've had it for...
    • tppower
    • Thread
    • 1989 c1500 courtesy lights standard cab wiring help
    • Replies: 47
    • Forum: Electronics
  15. L

    Looking for wiring diagrams and ground points for 89 c1500

    Looking for diagrams and grounding points. I have no power to my yellow accessory wire to my radio and multiple electronics in my truck are not getting power. There seems to be a completely dead circuit. The yellow wire that is supposed to get a constant voltage to radio with key out of the...
    • luvmychevy22
    • Thread
    • 12v ground problems grounding spots wiring diagram wiring harness wiring help wiring issues yellow wire
    • Replies: 1
    • Forum: Wiring Diagrams
  16. L

    I have no electronics

    Posting again to try and get help I have no electronics in my vehicle no horn no radio. No headlights no interior lights. No cigarette lighter list goes on. All the fuses are fine… all the in-line links at the junction box in engine bay are fine. I also noticed that the yellow accessory wire...
    • luvmychevy22
    • Thread
    • 1989 c1500 electrial issues electrical problems interior electrical wiring help wiring issues
    • Replies: 8
    • Forum: Electronics
  17. 9

    Help diagnosing burnt climate control module wires (92 k1500)

    The brown and orange wires are burnt. Referenced this diagram: https://www.justanswer.com/uploads/HammerTime/2006-08-31_120354_A_C_92_K1500.gif It looks like the brown goes to the low/high blower relays and a/c clutch relay. Orange appears to be labeled temperature door motor (blend door...
  18. E

    HELP 97 5.7l vortec c1500 with k1500 harness

    Bought this 97 5.7l C1500 vortec and finally got it running with no misfiring just constantly battling gimp mode, been inside the 4l60e MANY times trying to figure out what the hell was wrong with it and finding absolutely nothing, replacing all electronics and the internal wire harness to no...
  19. O

    Head lights won’t turn on

    I have 96 k1500 that I bought with some aftermarket goodies on there. I’m not mechanically savvy but It has towing mirrors with turn signal and reverse lights that turn on when the headlights are turned on. So I assume it was connected directly to headlights wiring. After a while My headlights...
  20. 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
  21. 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
  22. Fobra

    Power windows circuit 343 no power

    96 Yukon sle 4dr. So I’ve been trying to chase this issue with the power windows and I keep going the wrong direction. When I first bought the truck, none of the power windows worked. I tested all the window motors by manually feeding power to them and they all worked flawlessly. Changed all the...
    • Fobra
    • Thread
    • diagnostic electronics help power windows wiring diagram wiring help
    • Replies: 0
    • Forum: Electronics
  23. Fobra

    96 Yukon Factory Amp bypass

    Got issues with my 96 Yukon’s audio system. I changed the headunit and there’s no sound coming out of all the speakers. I’ve tried connecting the pink wire to the remote wire (blue) on the head unit and still no sound. I read up about bypassing the factory amp and I did locate where mine sits...
    • Fobra
    • Thread
    • audio factory amp radio wiring diagram wiring help wiring issues yukon
    • Replies: 1
    • Forum: Electronics
  24. L

    Harness Swap Gone Wrong

    Long Story short, I wrecked my truck almost a year ago and have been restoring it on my free time since. I bought a parts truck from a guy for 1k and began tearing it down and moving parts over. Today, after for the most part buttoning up the new wiring and putting in a new battery i turned the...
  25. hilly101111111

    No Reverse Lights

    Goodmorning folks hope everyone is doing well. I have a 1990 GMC K2500 with TBI 350 and Turbo 400 trans. I have been having some trouble with my tail light on the drivers side. long story short . The truck has new ground straps thru out and upgraded wires for the battery and alternator and new...
    • hilly101111111
    • Thread
    • backup lights led led conversion lights reverse lights reverse switch wiring wiring help
    • Replies: 7
    • Forum: Electronics

Latest posts

Members online

Total: 2,502 (members: 40, guests: 2,462)

Forum statistics

Threads
77,834
Messages
1,640,690
Members
80,539
Latest member
mcsssixspeed
Top