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  1. C

    Interior light, open door switch

    Both doors have them.
  2. C

    Interior light, open door switch

    That is a good thought. I'll look out for that.
  3. C

    Interior light, open door switch

    Sweet! Thanks. That's an easy place to start.
  4. C

    Speedometer issues.

    I have a 1977 C10. Speedometer doesn't work. I replaced the cable and confirmed the dash was working with an electric drill on the transmission side of the cable. I then replaced the little bullet shaped adapter and gear (it was red) in the side of transmission (I needed to anyways, it was...
  5. C

    Interior light, open door switch

    Hi all. I have a 1977 c10. My interior light works fine if I click the headlight knob to the left but does not come on when the door is open. Neither door turns it on actually. Anyone have a wiring schematic for these circuits? Or any ideas where I should start? Thanks in advance.
  6. C

    New head unit wiring issues

    Worked like a charm. Thanks again
  7. C

    New head unit wiring issues

    That's what I figured. Thanks for the quick reply. I will swap those in the morning.
  8. C

    New head unit wiring issues

    Oh by the way, that PDF in the original post is the wiring diagram page from the head unit's instruction manual.
  9. C

    New head unit wiring issues

    So i just installed a new digital media player into my 1977 C10. My stock wiring harness to the radio had three wires. Yellow, black, and grey. I hooked up the yellow to the yellow on the new stereo wiring harness (battery). Black to the black of the new harness (ground). I then ran a wire...
  10. C

    Gas gauge troubles

    My 1977 c10 gas gauge has been on the fritz. A few weeks ago it pegged itself way past full. It stayed that way for a few days and then one day when I started the truck it just went back down and was reading accurately again. It was fine for the next few weeks until just a few days ago...

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