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#1 |
Registered User
Join Date: Sep 2012
Location: Graham, WA
Posts: 136
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63 Headlights won't dim with switch
Hey everyone,
I looked around and didn't find any threads on this so here goes. I have a 63 C10 with stock wiring and for some reason the headlights won't dim. The red high beam indicator in the dash stays on no matter how many times I click the dimmer switch. When I do that, you can see that the lights are trying to dim, but they are still on bright...with the high beam light constantly on in the dash. I replaced the headlight switch (though for a different reason) and the dimmer switch a few months back. This problem started about a week ago. I've also checked the connections at both switches and at the radiator core support. My next step was to maybe disconnect one headlight at a time to see what happens with that...which would also allow me to check the connectors there. I also kinda suspect it to be a grounding issue, but I haven't pursued that yet. Anyway, have any of you had this issue before? I've seen many different headlight issues discussed on here, but not this specific one. Thanks in advance! Jerry |
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#2 |
Registered User
Join Date: Jun 2013
Location: joshua tree ca.
Posts: 1,484
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Re: 63 Headlights won't dim with switch
Replace the dimmer AGAIN ...... You can make-up a jumper wire with 2 male spade ends on it and disconnect the dimmer and jump the connector end of the harness one is headlight power (from headlight switch) #2 is LOW and #3 is HIGH ... Then you will know if it is the dimmer switch
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#3 |
Registered User
Join Date: Feb 2009
Location: southeasternfoothillsofusa
Posts: 1,557
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X2^^^^^^^^^
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#4 |
Registered User
![]() Join Date: Jan 2015
Location: Rohnert Park, ca.
Posts: 164
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Re: 63 Headlights won't dim with switch
I had the same issue you are describing . If I remember correctly it was a bad ground in the front harness or a bad connection at the rear of the lamp. Sucks getting old......
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#5 |
Post Whore
![]() Join Date: Mar 2013
Location: Southern Oregon
Posts: 10,384
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Re: 63 Headlights won't dim with switch
If I am not crazy...the dimmer switch grounds to the cab. If the grounds aren't good...the switch will not work, or completely shut the lights off.
__________________
1966 Chevy C10 "Project Two Tone" http://67-72chevytrucks.com/vboard/s...d.php?t=596643 1964 GMC "Crustine" semi-build:http://67-72chevytrucks.com/vboard/s...d.php?t=665056 My youtube channel. Username "Military Chevy": https://www.youtube.com/channel/UC_h...fzpcUXyK_5-uiw |
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#6 | |
Registered User
Join Date: Jun 2013
Location: joshua tree ca.
Posts: 1,484
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Re: 63 Headlights won't dim with switch
Quote:
Dimmer switch DOES NOT have to even be screwed down to work ...... NO need for ground at switch ... Switch merely "switches" headlight power from dash switch (line 1) to either LOW beam (line 2) OR to HIGH beam (line 3) ........ Floor dimmer switches are NOTORIOUS for screwing up ....... |
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#7 |
Registered User
Join Date: Jan 2013
Location: Calgary Alberta
Posts: 1,166
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Re: 63 Headlights won't dim with switch
Of course with a foot operated switch you have to have a floor under it. The PO of mine didn't have one in that section so he rewired it to a dash on off switch.
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