Quote:
Originally Posted by swissarmychainsaw
Here is a diagram of how this thing is wired.
But where is it getting power from the battery??? |
Attached is a portion of the GM Wiring Diagram specific to the rear window - it appears the battery power is sourced via the junction block on the firewall, found very close to the center under the hood. There is also a circuit breaker (unknown location, but I believe it is on the fuse block) which may be bad and denying your tailgate the power it requires.
User HATZIE has contributed priceless scans of GM manuals including a higher resolution PDF, the portion of what I've clipped. They can be found in this thread:
http://67-72chevytrucks.com/vboard/s...d.php?t=545416
The detail showing the power rear window circuits seems to be the next to the last page of the PDF - don't get cross-eyed trying to decipher the giant diagram in the middle.