Electrical issues
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1st Gear
Joined: Jul 2024
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Electrical issues
I've been upgrading my 2001 F-350 7.3 and have been having issues getting her started again. When checking my fuses, I realized that my diode on the passenger side of the fuse box wasn't getting the correct power. The other diode is getting the correct power. I'm not an electrician and I'm new to turning wrenches. Is this an IDM problem, PCM problem or am I missing something simple?
Lead Driver
Joined: Oct 2005
Posts: 6,129
Likes: 1,919
From: Ponca City, OK
The left diode, drivers side, is the PCM diode. The right is for the AC system. What were the conditions when you checked power? Engine on or off, AC on or off, diode installed or removed? Are you sure you were checking her upstream side? Diodes have a natural voltage drop across them. Usually in the neighborhood of 1v +- 0.5vish
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