95 k2500 glow plug relay wiring
 

Hey guys, my glow system quit working a couple days ago and I got dtc 29 for glow relay fault so I replaced it. New unit still does not work, no clicking no light, nothing. Red wire is hot, pink and yellow wires are dead, and black seems to be ground (small black) any ideas? I've checked the glow plug fuse and the guages fuse, as the chilton diagram shows it on the pink wire circuit... thanks in advance!

Wire diagram
 

Maybe this help you out

Attachment 23486It could be that you got bad relay i have seen many times here few more pics

sorry to rob a thread but this may help you too (guy who started thread)

i have a 94 yukon with the 6.5 in it i was wondering if you knew where the pcm is in it and how to test it or a site to look up