Need wiring help
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Posting Guru
Joined: Feb 2013
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From: Sunny Florida
Okay, after screwing around with it, here is what I have...
Brown wire- off 0V, start 12.4V, run 12.4V
Red wire- off 0V, start .1V, run .2V
Trying to start with brown wire on I and red wire on S... No start.
Trying to start with brown wire on S and red wire on I... Start and runs but starter stays engaged until brown wire is removed. Ignition switch shuts truck off with brown wire on either side now.
So my determination is the red wire is the ignition switch and the brown wire is my constant keyed power. This means my red wire is not working properly.
Where would I get the power for the ignition switch?
Brown wire- off 0V, start 12.4V, run 12.4V
Red wire- off 0V, start .1V, run .2V
Trying to start with brown wire on I and red wire on S... No start.
Trying to start with brown wire on S and red wire on I... Start and runs but starter stays engaged until brown wire is removed. Ignition switch shuts truck off with brown wire on either side now.
So my determination is the red wire is the ignition switch and the brown wire is my constant keyed power. This means my red wire is not working properly.
Where would I get the power for the ignition switch?
Thread Starter
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Posting Guru
Joined: Feb 2013
Posts: 1,323
Likes: 3
From: Sunny Florida
Yeah, this is most definitely something wired wrong on the ECM side. The alt is not wired at all to anything.
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Posting Guru
Joined: Feb 2013
Posts: 1,323
Likes: 3
From: Sunny Florida
There was a butt end connector used by the PO in the harness that apparently was the cause for the low voltage on the red wire.
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K9spike
1961 - 1966 F-100 & Larger F-Series Trucks
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Mar 29, 2007 07:06 PM
