Wiring----Color Codes-----
 

82-93 S-10 or blazer
12volts red (there will be 2) + ignition harness
Starter yellow or purple + ignition harness
Ignition pink + ignition harness
Second Ignition white + ignition harness
Accessory orange + ignition harness
Second Accessory brown + ignition harness
Power Lock lt. blue drivers kick panel
Power Unlock black/white drivers kick panel
Parking Lights+ brown switch or rear harness
Door Trigger white - pin or courtesy light
Dome Supervision use door trigger
Trunk/Hatch Release black + relay under left dash
Tachometer white AC coil on top of engine
Brake Wire white + at brake pedal switch
Parking Brake black - at the e-brake
Horn Trigger black - steering column


95-97 blazer or 94-97 S-10
12volts red (there will be 2)+ ignition harness
Starter purple or yellow + ignition harness
Ignition pink + ignition harness
Second Ignition white or pink/white + ignition harness
Accessory orange + ignition harness
Power Lock lt. blue + either kick panel
Power Unlock white + either kick panel
Lock Motor gray drivers kick panel
Unlock Motor tan drivers kick panel
Parking Lights+ brown switch or rear harness
Door Trigger white - keyless module
Dome Supervision use door trigger
Trunk/Hatch Pin tied in with doors
Trunk/Hatch Release black/white + switch or keyless
Tachometer white AC ECM
Brake Wire white + at brake pedal switch
Parking Brake black at the pedal
Horn Trigger black - steering column


98 + S-10 or blazer
12volts red + ignition harness
Starter yellow + ignition harness
Ignition pink + ignition harness
Second Ignition white + ignition harness
Accessory orange + ignition harness
Power Lock lt. blue + brown plug at BCM
Power Unlock white + brown plug at BCM
Lock Motor gray 5wi driver kick panel
Unlock Motor tan 5wi driver kick panel
Parking Lights+ brown + lt. blue plug at BCM
Parking Lights- white - lt. blue plug at BCM
Door Trigger - BCM
Dome Supervision use door trigger
Trunk/Hatch Pin pink/black - lt. blue plug at BCM
Trunk/Hatch Release black - purple plug at BCM
Tachometer white ac PCM
Brake Wire white + steering column
Parking Brake black - at the pedal
Horn Trigger black - steering column


Audio Related (covers all years except for slight variances)
Radio 12v--- orange
Radio Ground--- black
Radio Ignition--- yellow
Radio Illumination--- brown
Dimmer--- gray
Power Antenna--- pink...never in a s10 or blazer...but other gm's
LF Speaker +/- tan - grey
RF Speaker +/- lt green - dk green
LR Speaker +/- brown - yellow
RR Speaker +/- dk. blue- lt. blue

Ignition Black Wire?
 

Hey Rabbit,

You wrote:

82-93 S-10 or blazer
12volts red (there will be 2) + ignition harness
Starter yellow or purple + ignition harness
Ignition pink + ignition harness
Second Ignition white + ignition harness
Accessory orange + ignition harness
Second Accessory brown + ignition harness

I also have a black wire coming from the ignition switch for my 82 S10 column. Any idea what this is for? I am putting the column in a 49 Chevy Pickup and am doing the wiring myself.

Thanks...
patioman

Ground most likely.

Yes black usually indicates a ground wire.

makes sense to me....thanks

need help 98 s10
 

hey i have a 98 chevy s-10 i had to take the dashboard out because i snapped the plastic pivot for the clutch pedal anyways everything went smoothly back into place but i have a plug that dosnt have a home i work for a nissan dealership and by no means am i stupid.

the plug is pertruding through where the e-brake release is (i havent put that panel on yet) it has 10GA wire with red blue orange and brown

i tried alldata and mitchell and still nothing :confused:

The Revenge (joke)
 

'89 S-10 Blazer under-dash wiring photo?
 

Hello,

I like the post but have not been able to find what I need.

I am in need of a color photo of the wiring harness that includes the various interior lights, ashtray light, glove compartment light and radio wiring for an '89 S-10 Blazer. I've searched online including Autozone's slte and I have not been able to find what I'm looking for.

I disassembled my dash and failed to label which wires go where. It's been long enough that I cannot remember, and to complicate matters the aftermarket stereo does not utilize some of the wiring and plugs that still exist behind the radio.

I think what remains to be put back in their proper places are 2 or 3 courtesy lights, the ashtray light and the glove box light.

If this type of photo is available from a particular manual or book that can be found in a library, etc. I sure would appreciate being aimed in the right direction.

Thanks,
DBG

Hey I have a 2012 RG Colorado im tryying to put a turbo timer on but im having trouble with the ignition harness colors can somebody help me? Thanks

wiring colors
 

If you go to any GM dealers repair shop, they should have a repair manual and they should be willing to give you a photo copy of a page or two.
If you ask and they won't do it, go to another GM dealers shop.
This usually works for me. :)