idk what the hell is wrong, but I'm sure I'll need parts - PowerStrokeNation : Ford Powerstroke Diesel Forum
 
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post #1 of 6 (permalink) Old 03-30-2018, 07:41 PM Thread Starter
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idk what the hell is wrong, but I'm sure I'll need parts

Pcm never switches to ground mode for the gpr. Hard start, sometimes clicks only, and must cross point on starter relay. Pcm? Am I the only o e would dering how to check it's connections? It's barried and has a short harness. Easy way I don't know?
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post #2 of 6 (permalink) Old 03-31-2018, 01:14 PM
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Re: idk what the hell is wrong, but I'm sure I'll need parts

No it's a lot easier than you think. But we need to know the model.

What kind of truck are we talking about here?

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post #3 of 6 (permalink) Old 04-07-2018, 05:52 AM Thread Starter
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2000 xlt 4door 4wd short bed 7.3l I like easy, it's a rarety.
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post #4 of 6 (permalink) Old 04-07-2018, 02:24 PM
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Re: idk what the hell is wrong, but I'm sure I'll need parts

Well, I'm finding two different styles. One has the pcm controlling everything and one has a control module, so I'm assuming they switched it up at some point and put a module in it. Im also assuming you have the pcm style since you mentioned pcm. This is a pretty crappy schematic, but it'll have to do. It's all I can find.

So anytime the key is on you will have power on both of the small terminals of the relay. If the pcm is trying to turn it on, the side with the black wire will drop to zero volts and the red side will still be 12v. If the pcm is not turning it on there will be 12v on both of the small terminals of that relay. That's how you will know if it's a control problem or a power one. Simply hook a voltmeter to the black wire and turn the key on. If there is 12v there the pcm is not turning it on. If there is 0v there, it is turning it on, or trying to anyway and the problem is somewhere else.

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post #5 of 6 (permalink) Old 04-07-2018, 02:25 PM
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Re: idk what the hell is wrong, but I'm sure I'll need parts

Forgot the diagram.

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post #6 of 6 (permalink) Old 04-07-2018, 02:30 PM
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Re: idk what the hell is wrong, but I'm sure I'll need parts

Does anybody know if starter cable pulls power from the glow plug relay terminal? I'm thinking the two problems are related.

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