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I have an 87 coupe, and notice that my interior lights flicker sometimes and
don't come at all other times. This doesn't effect the starting or running. Also
replace the passenger sunvisor and the mirror doesn't work where can i find a wiring diagram. Haynes or Chiltons doesn't show the wiring diagram.
you need an older haynes my manual has great wiring diagrams but is getting old and falling apart so I tried to buy a new one only to find the new ones wiring section sucks if you can find it my manual number is
24041 (1336) hope this helps :auto:
GM has an electrical diagnosis service manual supplement. It has the complete circuit diagram and diagnosis steps for all electrical systems including pictures of parts and ground locations. I am very glad I have one.