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#1 |
Junior Member
![]() Join Date: Jun 2016
Location: Shelbyville, TN
Posts: 56
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1969 Chevy C-10 lights mystery
I had a bad headlight switch. So I bought a new one and the only lights that will work are the headlights. I can use a wire and pinout all the connectors and all the lights work....Headlights - parking lights and dash lights. But, when I plug the switch in with the headlight knob only the headlights work. I am on my second new switch and they both do the same things. I am at a loss. Does anyone have any ideas?
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#2 |
Post Whore
![]() Join Date: Feb 2016
Location: Portland Oregon
Posts: 11,158
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Re: 1969 Chevy C-10 lights mystery
I would disassemble the connector plug and inspect all of the spade terminals.
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Thanks to Bob and Jeanie and everyone else at Superior Performance for all their great help. ![]() RIP Bob Parks. 1967 Burban (the WMB),1988 S10 Blazer (the Stink10 II),1969 GTO (the Goat), 1970 Javelin, 1952 F2 Ford OHC six 4X4, 29 Model A, 72 Firebird (the DBP Bird). 85 Alfa Romeo If it breaks I didn't want it in the first place The WMB repair thread http://67-72chevytrucks.com/vboard/s...d.php?t=698377 |
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#3 |
Registered User
Join Date: Sep 2016
Location: south jersey
Posts: 118
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Re: 1969 Chevy C-10 lights mystery
Check the fuse first
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70 c 10 daily Rider |
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#4 |
Junior Member
![]() Join Date: Jun 2016
Location: Shelbyville, TN
Posts: 56
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Re: 1969 Chevy C-10 lights mystery
Thanks HO455 I will try that. Seems that maybe the blades connections in the switch are maybe not touching except on the headlight terminal. Don't think it would be a fuse since all lights work when using a wire. It just seems strange that two switches are doing this exact same thing.
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#5 | |
20' Daredevil (Ret)
![]() Join Date: May 2003
Location: Jefferson State
Posts: 13,647
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Re: 1969 Chevy C-10 lights mystery
Quote:
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- Mike - 1972 K20 LWB 350/350/205 RIP El Jay |
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#6 |
Junior Member
![]() Join Date: Jun 2016
Location: Shelbyville, TN
Posts: 56
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Re: 1969 Chevy C-10 lights mystery
Well...now I am really at a loss. Took all the wire connectors out of the plastic connector plug that goes to the headlight switch....actually slid them ON the metal tabs on the headlight switch and still only the headlights come on. If I substitute the dash lights wire on the tab that is for the headlights...they work. Actually anything I plug onto that position works. But not when they are plugged into their correct position on the switch. I get right at 12 volts on the red wire which is correct. Maybe there is a grounding problem somewhere...I just don't know.
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#7 |
Msgt USAF Ret
![]() ![]() Join Date: Jan 2005
Location: Kalamazoo, Michigan
Posts: 8,714
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Re: 1969 Chevy C-10 lights mystery
Most of the guys think that the red wire on the headlight switch is the power wire for the tail lights and parking lights. Actually it only powers the blue wire which goes to the dimmer switch.
The orange wire is the power wire for the tail and dash lights and it should have full time power as long as the battery is connected. This is so the tail lights and brake lights can work without the key on and still not have to turn the headlights on. The orange wire is powered at the fuse box by a separate red wire in the four way junction in the cab. This red wire goes into the back of the fuse panel and powers the orange wire and the hazard flasher. Notice the orange wires in the fuse panel, lower right, They feed the stoplights the dome lights and the headlight switch, next diagram. The orange wire going to the headlight switch is on the lower right. It must have power for the tail lights to work. Check the stop tail fuse in the fuse panel. If it is not blown then there is a wire broken. You can narrow it down if the stop lights don't work or the dome light or the flashers. \ The orange wire goes to the headlight switch and when the switch is pulled the orange wire connects with the brown wire which runs to the parking lights. It also connects to the green wire which goes to the dimmer rheostat in the headlight switch and then to the fuse panel to the gray wire for the dash lights.
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VetteVet metallic green 67 stepside 74 corvette convertible 1965 Harley sportster 1995 Harley wide glide Growing old is hell, but it beats the alternative. |
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#8 |
Junior Member
![]() Join Date: Jun 2016
Location: Shelbyville, TN
Posts: 56
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Re: 1969 Chevy C-10 lights mystery
Thanks VetteVet...I will for sure go out and meter all this and find out if this is my issue. Great info.....as always.
Mike |
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#9 |
20' Daredevil (Ret)
![]() Join Date: May 2003
Location: Jefferson State
Posts: 13,647
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VetteVet, sure glad to see you show up here, I have run out of ideas. I especially like that last pic, have not seen that one before.
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- Mike - 1972 K20 LWB 350/350/205 RIP El Jay |
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#10 |
Registered User
Join Date: Dec 2009
Location: El Dorado Ca
Posts: 3,374
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Re: 1969 Chevy C-10 lights mystery
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#11 |
Junior Member
![]() Join Date: Jun 2016
Location: Shelbyville, TN
Posts: 56
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Re: 1969 Chevy C-10 lights mystery
Thank You VetteVet.....your information was right on. I cleaned the fuse terminal and replaced the fuse for the orange wire and all works now. Thanks for the pics. Just a question....were do you find information like this? I have the service manual on CD and I could not find anything that told me about the orange wire needing to be hot with 12v. I certainly will put this one in my notes and will pass it on to anyone who needs this info int he future also.
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#12 | |
Msgt USAF Ret
![]() ![]() Join Date: Jan 2005
Location: Kalamazoo, Michigan
Posts: 8,714
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Re: 1969 Chevy C-10 lights mystery
Quote:
I have been doing this for a long time I guess that's why I have a knack for it.
__________________
VetteVet metallic green 67 stepside 74 corvette convertible 1965 Harley sportster 1995 Harley wide glide Growing old is hell, but it beats the alternative. |
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