Fuse 22 Keeps Blowing - Ford Powerstroke Diesel Forum
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Old 03-21-2011, 06:17 AM
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Fuse 22 Keeps Blowing

I have a 02 F350 7.3 diesel, I had new glow plugs and GPR installed in November. About a month ago it started blowing fuse #22. I have installed new batteries, checked HPOP, oil and put new fuel filter in. I unhooked the heater on the fuel bowl to see if this was the problem but it stills blows the fuse. The only time it seems to blow is when I am trying to start it when it hasn't been plugged in and it is cold out. Once it is running I have no problems with it blowing the fuse. Could I have a bad GPR or is it something more?
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Old 03-21-2011, 07:31 AM
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There's been some confusion about the fuel heater and fuse #22. On the older (pre-99) trucks that was the fuse that protected the fuel heater and people keep confusing it with the 99-03 trucks...

The Fuel Heater Fuse on your truck is #30.

What does your owners manual say #22 is protecting?
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Old 03-21-2011, 08:19 AM
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They manual says that fuse #22 is for engine controls. When it blows it causes rlay #303 to start clicking when you turn the ignition on. This relay is for the IDM relay.

From some other research online I have found that Fuse 22 is supplyed power by PCM relay and also supplies power to.
Break pressure switch
PCM at points 97 & 71
IAH relay
IPS
Glow plug relay
Glow plug control module
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Old 03-21-2011, 11:51 AM
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My fuse never blew, BUT I had an issue with the IDM relay buzzing and it turned out to be the fuseable Link connector on my '02 F350.

Have a look at my thread and check your connector block maybe it's somehow related ->

POTENTIAL ELECTRICAL CORROSION if your truck is like mine......
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Old 03-21-2011, 12:34 PM
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Thanks NoRalPh, def will check and let you know results. Thanks.
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Old 03-26-2011, 05:55 AM
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Checked the connector block, it had a little rust on it but wasn't all that bad. Cleaned little rust off and sprayed it down. Ordered a stancor gpr and installed that and it seems to have fixed the problem. I have left it uplugged the past few nights, temps below 10, and it has fired right up in the morning and hasn't blown the fuse.
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