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Chevy Duty Headlight Switch Wiring
#87460 Sun Dec 09 2001 05:08 AM
Joined: Oct 2000
Posts: 209
Shop Shark
I'm replacing an old headlight switch in my 1953 GMC with one I got from Chevy Duty. The problem is that they didn't provide a wiring diagram and the terminals are not marked. Does anyone have any idea on the right way to wire it? :confused:

Re: Chevy Duty Headlight Switch Wiring
#87461 Sun Dec 09 2001 07:23 AM
Joined: Feb 2001
Posts: 1,904
One wire at a time!

Or look at a shop manual.
May be able to find a diagram at the library or someone here may be able to send you the wiring diagram.

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Re: Chevy Duty Headlight Switch Wiring
#87462 Sun Dec 09 2001 07:12 PM
Joined: Sep 2001
Posts: 29,892
ace skiver

One wire at a time; or, call Chevy Duty. Many aftermarket light switches are wired differently from the original (in fact, Chevy Duty states that theirs "will work with minor modifications to wiring."

Call Chevy Duty (I had the same problem with one of their ignition switches) to find out the correct designations for each terminal. However, if the terminals on the new switch look like those on the old switch, check out the crude drawing below (for a Chevy truck).

Good luck, Tim


Tim []
1954 3106 Carryall Suburban [] - part of the family for 49 years
1954 3104 5-window pickup w/Hydra-Matic [] - part of the family for 15 years
Z-series (54/55) GMC 350 (2-ton) COE [] - now part of Dave's family
- If you have to stomp on your foot-pedal starter, either you, or your starter, or your engine, has a problem.
- The 216 and early 235 engine are not "splash oilers" - this is a splash oiler. []
Re: Chevy Duty Headlight Switch Wiring
#87463 Mon Dec 10 2001 07:02 PM
Joined: Jun 2000
Posts: 2,773
Shop Shark
The aftermarket switches are wired differently. I made a diagram like the one Tim has, then sat down with an ohmmeter and found the corresponding terminal on the new switch. If you don't have an ohmmeter connect the power and do the old hit and miss method, doing it one wire at a time,until you have them all right.

52 3600
69 C-10

Moderated by  Rusty Rod 

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