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Thread: 95 c1500 c100 pin out diagram?

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  1. #1
    Join Date
    Jan 2014
    Posts
    154

    95 c1500 c100 pin out diagram?

    I'm tired of searching! Been looking for days and only found a pin out for 96+ and it didn't match my wire colors. anyone know were I can find it?
    Need to hook up my tach, vss, and mil wires. The c100 (black conector driver side fire wall) has 2 white wires so I'm not sure which it is and really don't want to remove all my wiring loom to trace it. The mil, and vss I can figure out but would like a pin out to double check those before I start tapping into wires

  2. #2
    Join Date
    Aug 2011
    Location
    Ellsworth Air Force Base, SD
    Posts
    143
    Mine is a 94 and I know things can change a lot in a year, but this may help. This is what the back of my instrument cluster looked like, sorry it is a poor quality pic.



    I then used this diagram and a volt meter set on the continuity check, and traced each wire. Most came out behind the glove box (speedo, tach, SES, ect) and the temp, oil and alt/volt came thru the C100. Here it is



    I have like you, searched hi and low for a C100 pinout will no luck at all. I just had to break out the volt meter and figure it out.
    1994 Chevy C1500 RCSB 05' DBW 5.3 Conversion Complete
    My build

    Coming soon ....... Full Repaint, 214/220 Cam, Yukon Posi with 3.73's, remove body lift

  3. #3
    Join Date
    Jan 2014
    Posts
    154
    Think I found what I was looking for finally, the vss wire goes to 2 wires pulled from a connector that goes to the vss buffer/DRAC behind the dash so will my cruise still work after this? Also fond the plug with mil/tach wire
    Also, being I'm 5 speed manual trans, do I need to hook up the purple brake switch wire? The on that tells the pcm when you let off the gas?

  4. #4
    Join Date
    Jan 2014
    Posts
    154
    Woops, double post

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