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06-01-2020, 04:54 PM | #1 | |
Registered User
Join Date: Oct 2012
Location: Philly, PA
Posts: 537
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Re: 66 C10 AAC Wiring Questions
Quote:
For the tail lamps, if you haven't, I suggest disconnecting the harness under the rear bumper and take voltage readings from each of the wires as follows: 1. all lights off 2. all lights off and brakes on 3. running lights on and brakes off 4. running lights on and brakes on 5. running lights and head lights on and brakes off 6. running lights and head lights on and brakes on If they all check out okay and you have decent voltage readings, you know the harness coming out of the cab is good, so the issue is definitely at the back half of the harness, which makes it much easier. If that's the case, most likely it's one of the following: the wiring and connections to the tail lights need to be reconfirmed; need better grounds to the tail lights; the LEDs don't want to work with 50+ year old technology. As a side, I'm in the camp of not using LEDs on the truck, with a few exceptions. LEDs have requirements that don't mix with older vehicles, so they have a habit of doing some very odd things.
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06-01-2020, 06:21 PM | #2 | |
Registered User
Join Date: Feb 2016
Location: Valrico, Florida
Posts: 661
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Re: 66 C10 AAC Wiring Questions
Quote:
The green and ground were flipped backwards which caused current bleed over. Lesson on this one Pix to illustrate |
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