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73-87 Chevy _ GMC Trucks => Electrical => Topic started by: Marvan c10 on December 22, 2011, 06:26:38 PM

Title: Dome light wiring
Post by: Marvan c10 on December 22, 2011, 06:26:38 PM
 Does anyone know which wire on the headlight switch is for the dome light ? I've check the switch with a circuit tester and all the wires are hot. The O/W wire thats routed for domelight isn't on the back of the switch. I'm trying to start from there because under my dash looks like a spaghetti factory.
Title: Re: Dome light wiring
Post by: bd on December 22, 2011, 08:35:58 PM
Welcome to the site from California.

Dome lamp gets fused battery hot (orange wire) all the time.  The headlamp switch generally completes the dome lamp circuit to ground via the small gauge white wire.  Check out the wiring diagrams in the technical section of this website:
http://forum.73-87chevytrucks.com/smforum/index.php/topic,11766.0.html (http://forum.73-87chevytrucks.com/smforum/index.php/topic,11766.0.html)

Quote from: Marvan c10 on December 22, 2011, 06:26:38 PM
...I've check the switch with a circuit tester and all the wires are hot....

If (as you stated) the white wire probes hot (measures ~12 volts), the circuit is complete from battery, thru the fuse and bulb, all the way back to the headlamp switch.  Make sure the switch frame is properly grounded.  If everything else checks out, the hdlmp switch may have gone on vacation.

To help improve the accuracy and usefulness of responces, it's best to provide year, model and other information relating to your question, as well as the specific problem you're trying to solve.

Again, glad to have you on board!  :)
Title: Re: Dome light wiring
Post by: muddpuppy01 on December 22, 2011, 08:41:16 PM
should be the orange and white wire from the switch to the drive side door switch to the passenger side then to the light
Title: Re: Dome light wiring
Post by: Marvan c10 on December 22, 2011, 08:49:15 PM
 
 Sorry ! I have a 1980 C10 stepside 350/ 3 speed A/T.
Title: Re: Dome light wiring
Post by: Marvan c10 on December 22, 2011, 08:59:53 PM

 Thanks guys within the replies I think I found my answer. Once again, you guys ROCK !
Title: Re: Dome light wiring
Post by: Marvan c10 on January 13, 2012, 07:31:56 PM

 Problem is fixed ! I found out for some reason there was no power running to the fusebox for that wire, so I just jump a wire from another hot plug. DOME LIGHT IS WORKING YEAH ! Thanks Guys
Title: Re: Dome light wiring
Post by: bowdown916 on February 24, 2012, 07:42:05 PM
ahh.i have the same problem.. the orange wire that goes in the fuse box, its that on the first top/left spot?

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Title: Re: Dome light wiring
Post by: bowdown916 on February 24, 2012, 07:43:21 PM


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Title: Re: Dome light wiring
Post by: bowdown916 on February 24, 2012, 07:44:06 PM
Sorry.it looks white.but its orange with white..

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