66 Ford F-250 Truck Wiring Diagram
Printed From: the12volt.com
Forum Name: Vehicle Wiring Information & File Requests
Forum Discription: Request Car Alarm, Car Stereo, Cruise Control, Remote Starter, Navigation, Mobile Video, and Other Vehicle Specific Wiring Info, Manuals, Tech Tips
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=56100
Printed Date: May 03, 2024 at 3:49 AM
Topic: 66 Ford F-250 Truck Wiring Diagram
Posted By: adrianspeeder
Subject: 66 Ford F-250 Truck Wiring Diagram
Date Posted: May 20, 2005 at 11:09 AM
Howdy,
I'm tryin to get our 66 F-250 to pass inspection by next week. The wiring under the hood is an absolute mess, but the only thing that doesn't work is the passenger side front turn signal. Four ways are good and the other signals are good, but that is only through dumb luck. The wiring is so hack job that I will just start over. Anyone have a diagram for this ole girl?
Adrianspeeder
Replies:
Posted By: hotwaterwizard
Date Posted: May 21, 2005 at 11:19 PM
 ------------- John DeRosa (Hotwaterwizard)
Stockton California
When in doubt, try it out !
Posted By: hotwaterwizard
Date Posted: May 21, 2005 at 11:19 PM
Posted By: adrianspeeder
Date Posted: May 22, 2005 at 1:02 PM
Hey thanks John, you da man! Exactly what I needed. I think the problem comes from some some goober installin a trailer brake controller and hackin everything up. No need to tow trailers using this truck as I have a powerstroke for that, so I will just wire it up like stock.
Adrianspeeder
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'02 F250 PSD, '97 F-150, '71 F-100, '66 F-250, '93, '92, '88, '84 Broncos
Penn State electrical engineerin' major
Posted By: hotwaterwizard
Date Posted: May 22, 2005 at 1:08 PM
Not an F250 but Close.
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John DeRosa (Hotwaterwizard)
Stockton California
When in doubt, try it out !
Posted By: adrianspeeder
Date Posted: May 25, 2005 at 11:24 AM
Current status...
Mostly rewired using the above diagram. The one turn signal up front was fixed with a new ground and a bulb. The rear lights were screwed up due to three different attempts at wiring up trailer connections. Got rid of all that junk and the rears work, almost. No brake lights. Hot wiring power to the master cylinder pressure switch lights the lights with the brake pedal, but need to find why the stock supply to the pressure switch is dead. Not really as critical now as I have my inspection sticker and can drive around to get other parts for it.
I'll get some new pics up soon.
Adrianspeeder
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'02 F250 PSD, '97 F-150, '71 F-100, '66 F-250, '93, '92, '88, '84 Broncos
Penn State electrical engineerin' major
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