8-88 F350 7.3 automatic blowing fuse randomly - Ford Powerstroke Diesel Forum
7.3L IDI (Non-Powerstroke) Diesels Technical discussion of topics related to vehicles powered by the 7.3 Liter In-Direct Injection Navistar engines.

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post #1 of 2 Old 10-26-2011, 07:33 PM Thread Starter
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8-88 F350 7.3 automatic blowing fuse randomly

Gentlemen, I am new to this forum. It is awesome. I have looked all over this site and hope I am not addressing a dead horse here but I have a problem I need help with.
F350 incomplete chassis built 8-88 7.3 automatic. It randomly blows the gpr circuit fuse, had a new relay installed before I started working on it. I'll post fuse # when I look again but I have a 30 amp breaker in it right now and it runs fine but randomly will trip the breaker and shut down. Wait a bit and runs again sometimes the rest of the day no problem, other times it does it every 100' or so, 3-4-5 times then it's good for hours or days. Does not look to have the fuel heater in the filter housing I have read about...It has 1 wire to top of filter housing I assume is water in fuel sensor??? Checked a lot of wiring and have not found anything terrible and what I have fixed hasn't cured it. Any help is greatly appreciated and will give info as needed. THANKS guys!!!!
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post #2 of 2 Old 11-05-2011, 08:44 PM
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the 1 wire plug in top of the filter housing is a fuel heater. but if have already replaced the relay i would check the wiring going to it for chaffing and grounding that causes it to trip good luck
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