Electrical trouble shoot
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Post Fiend
Joined: Jan 2006
Posts: 5,037
Likes: 9
From: Kasson, Minnesota
Electrical trouble shoot
Alright, I don't have a problem persay, but I am just trying to straighten out some PO wiring that was sort if a mess with my 75 supercab. At one point it had a dual battery setup and when I got it, the battery isolator was still there but everything unhooked. What I have now is a wire from the batt post on the alternator hooked to the batt side of the solenoid directly. The heavy black wire that originates from a fuse link and travels down to the alternator into a rubber loom containing the FLD and SAT wires was cut and lenghtened to what I assume was hooked to a battery isolator. I just had it rolled up and taped until I could figure out exactly what was going on. I assume that I should eliminate the other wire from the batt post in the alternator to the solenoid and just reattach the factory heavy gauge wire to the batt post on the alternator to make things right. Just making sure this is correct. I am not going to use any sort of dual battery setup.
MSEE
Joined: Apr 2004
Posts: 10,386
Likes: 35
From: Austin, TX
I'm having a little trouble picturing in my head what the PO left, but at the end of the day, you'll want to make sure the alternator output runs to the battery side of the solenoid through a fusible link. The alternator output also needs to branch off to run to the 'A' input of the regulator. This happens in molded junction in the factory harness.
If you have an ammeter instead of an ALT light, there's also a parallel tract between the alternator output and battery that runs up to the gauge.
If you have an ammeter instead of an ALT light, there's also a parallel tract between the alternator output and battery that runs up to the gauge.
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Post Fiend
Joined: Jan 2006
Posts: 5,037
Likes: 9
From: Kasson, Minnesota
Here is some more pics starting from the solenoid and working down to the alternator. I am pretty sure I have I figured out.
Here is the back of the alt. The PO ran a separate black wire from the batt post to the solenoid and the other black wire was cut and lengthened to go somewhere.
Here is the back of the alt. The PO ran a separate black wire from the batt post to the solenoid and the other black wire was cut and lengthened to go somewhere.
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