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Old 04-09-2024, 10:35 PM   #9
leftybass209
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Join Date: Feb 2011
Location: Modesto, CA
Posts: 2,186
Re: Trouble with voltage drop

Update: tore apart the fuse panel, pulled and cleaned all the connections, and reinstalled. Moved the sensing wire closer to the main harness power feed.

None of this has helped. Even though the headlights are on relays, even pulling the headlight switch out has roughly a 1.5 volt drop from 14.6 to 13.08, which doesn't make much sense considering the relays.

I do have a diode in-line from the alt. To the brown/white stripe wire at the ignition switch. I do not have a resistor and I've read that I may need a 47 ohm resistor in line to protect the diodes in the alternator, depending on if the wire itself is a resistance wire. I couldn't get a reading on a wire checking for ohms.

If the diodes were damaged though, wouldn't that cause a low/no charge symptom?
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