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- Constant hot wire | GM Square Body - 1973 - 1987 GM Truck Forum
Orange has always been hot at all times, on a few different fuses (dome courtesy lamp, cigarette lighter, horn, etc) gray is dash lighting controlled by turning the light switch knob, pink is ignition hot GM has used the same wiring colors for as long as the 12 volt system has been around
- Need Help - 7 Pin Brake Wire Always Hot? - Diesel Place
Hello, I have an '07 GMC that I bought used that had an after-market Reese Brakeman Digital Controller already installed in it I recently attempted to use the 7 pin connector to power a trailer with the typical stop, turn, running lights and electric brakes All the lights are working fine
- Gmc 7000 | Yesterdays Tractors Forums
We looked all over the internet and what manual we had and found only one reference to the big trucks (gmc 7000) it said to remove the est wire or electronic spark timing wire
- WIRING DIAGRAMS - 73-87ChevyTrucks. com
WIRING DIAGRAMS DESCRIPTION These diagrams use a new format The diagram is surrounded by a alpha numeric loaction grid All the wires at the connectors have alpha numeric addresses showing where the other end of the wire is located ac cording to the grid
- 1987 Gmc 7000 wiring info - Heavy Equipment Forums
I have a GMC 7000 with a few wiring questions about Any help would be appreciated 1 How do you tell if your truck has a diff lock or not? The manual says it does but not really sure what to look for Really getting tired of getting this truck stuck 2 Where can I get a full wiring diagram at? My gauges work when they want to and my cab lights flicker sometimes I looked under the dash to see
- 1988 GMC C7D (C7000) Lots of Questions - TruckersReport
1988 GMC C7D (C7000) Lots of Questions Discussion in ' Heavy Duty Diesel Truck Mechanics Forum ' started by lastcowboy32, Mar 12, 2021
- GMC Wiring Diagrams - FreeAutoMechanic
GMC Wiring Diagrams SEARCH GMC WIRING DIAGRAMS Wiring Diagrams If you run into an electrical problem with your GMC, you may want to take a moment and check a few things out for yourself Before you dive in with a multi-meter, you will want to obtain a free wiring diagram for your specific model
- Brake Lights won’t turn off - GM Truck Club Forum
the brake switch wires orange will have 12 volts at all times the white wire is the feed to the brake lamps so you unplugged the brake pedal switch and the brake lights stayed on correct ? if so then your rear harness circuit board connector has a short in it powering up the brake lights
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