Installed Stancor GPR and still no start! - Ford Powerstroke Diesel Forum
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Old 01-09-2010, 06:44 AM
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Installed Stancor GPR and still no start!

I am new to this site and also a new diesel owner. I bought a 2002 Super Duty F250 a couple months ago. The truck never did want to start when it was cold out so I checked the GPR and wasn't getting voltage on the outgoing side (yellow and brown wires). So, today I installed my Stancor GPR and I am still not getting any voltage on the outgoing side. I took a screwdriver and jumpered the contacts and held it there for a little bit and then tried to start the truck and I could tell that it wanted to start a lot better. What could be the problem with not getting any power on the outgoing side of the relay? I'm new at this but I am assuming I'm not getting voltage to my glow plugs. By the way the truck starts with no problem when plugged in. Thanks!
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Old 01-09-2010, 06:47 AM
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Make sure you have the wires connected properly and that they arent backwards on the relay
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Old 01-09-2010, 06:51 AM
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I didn't think the relay was polarity sensitive because there was no + or - symbol on the relay. But I can give it a try.Thanks!
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Old 01-09-2010, 06:52 AM
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Are you sure you have it wired right. Check all your fuses. I'm pretty sure the pcm controls the gpr.
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Old 01-09-2010, 06:58 AM
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I am 99% sure I have it wired right but I never thought to check my fuses. Do ya know which fuse it is?
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Old 01-09-2010, 07:22 AM
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Quote:
Originally Posted by Dean'o View Post
I am 99% sure I have it wired right but I never thought to check my fuses. Do ya know which fuse it is?
no I don't which fuse it is, sorry. Definitely check the wiring here's a post that will show you the relay wiring. GPR LED mod payed off big time. - Page 2 - Ford Truck Enthusiasts Forums
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Old 01-09-2010, 07:23 AM
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worst comes to worst, if the pcm isn't functioning properly you could install a switch to manually control the gpr.
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Old 01-09-2010, 07:34 AM
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you cant wire it backwards. Unless you did a little wire to where a big one should be. Thats not possible. Make sure the battery connections are good and clean. Use a test light on the wire from the pcm. See if it gets hot(remove it from relay first)? If not its a fuse issue or the pcm is not working correctly. In that case do a switch.
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Old 01-09-2010, 08:29 AM
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Glow plugs are good?
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Old 01-09-2010, 08:31 AM
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Quote:
Originally Posted by melmount View Post
you cant wire it backwards. Unless you did a little wire to where a big one should be. Thats not possible. Make sure the battery connections are good and clean. Use a test light on the wire from the pcm. See if it gets hot(remove it from relay first)? If not its a fuse issue or the pcm is not working correctly. In that case do a switch.
I don't understand how it's not possible to wire it wrong. You have 4 posts on the relay. 2 big and 2 small. If you were to put the wires from the pcm on the wrong small post it will not work correctly. The one small post is to energize the the switch the other is to activate it. As far as the big posts that in theory shouldn't matter as long as the circuit is completed.
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