G.P Relay question - Ford Powerstroke Diesel Forum
 
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post #1 of 8 Old 04-29-2014, 12:56 PM Thread Starter
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G.P Relay question

I did a search and couldn;t find what I need. I was NOT getting 12V in the one larger wire that is supposed to have 12V when the key is on on the relay(closest wire to drivers side). I bought a new relay thinking it was toast. Put new one in and same problem. Can someone please tell me what to check next.
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post #2 of 8 Old 04-29-2014, 01:47 PM Thread Starter
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I also just changed the starter, could I of disturbed a fuseable link? Also whats the relay on the Pass fender for?
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post #3 of 8 Old 04-29-2014, 03:22 PM
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First - what yr is your truck?

Second, the two Lg terminals on the relay are the Line/Load terminals and neither of them "come on with the key". One is connected to the battery (on all the time) the other is connected to the plugs are only has power in it when they are activated. Has nothing to do with the WTS light on the dash. Of the two sm wires, one has power with the key, the other is grounded by the PCM to activate the GPR

Next, if you have a relay on the pass side fenderwell, and it looks like the GPR, then that would be the starter relay.

Exactly what is not working now? (you haven't made your trouble very clear )
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post #4 of 8 Old 04-30-2014, 05:49 AM Thread Starter
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SOrry I'm just pissed off, something new breaks on this truck every week. I've nick named it "Kevin Hart" because its a funny truck.

Its a 1999. F350 7.3 4x4 6 speed. I was not getting 12V on the larger post of the relay when the key was on. Which to my understanding is 12V going to the plugs. I go out today to check and it is getting 12V now. I think kevin needed the night to reflect on his actions.
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post #5 of 8 Old 04-30-2014, 05:52 AM
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Quote:
Originally Posted by 350swr View Post
SOrry I'm just pissed off, something new breaks on this truck every week. I've nick named it "Kevin Hart" because its a funny truck.

Its a 1999. F350 7.3 4x4 6 speed. I was not getting 12V on the larger post of the relay when the key was on. Which to my understanding is 12V going to the plugs. I go out today to check and it is getting 12V now. I think kevin needed the night to reflect on his actions.
glad your finding funny in troubles. If you need help just ask these are simple trucks. NoRalPh is correct follow his info...what issues you having?

What this nation needs is cleaner thoughts and dirtier fingernails...
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post #6 of 8 Old 04-30-2014, 06:56 AM
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But, Again, the plugs aren't always on with the key so, most of the time you're not supposed to see power at that terminal. It has to do with the engine oil temp sensor and the PCM decides how long to activate them. Try first thing in the morning, but it might only be 15-20 seconds depending on how cold it was overnight.

PLUS, above 40F you don't even need them (it will start a little slower but not drastically).

You still haven't told us What the Problem is you're trying to resolve...
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post #7 of 8 Old 04-30-2014, 07:09 AM Thread Starter
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Yeah I needed to add some comedy. Well maybe it was a bit below 40 because the truck struggles to start. I am trying to fix the problem of white smoke pouring all over the neighbours houses.
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post #8 of 8 Old 04-30-2014, 09:02 AM
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I have a 2001 and my GPR is in the center of the engine by the firewall, I went for the starter relay first and had a 'duh' moment when I figured out where I went wrong. I would trace the wire that should be hot to its origin and see if the connection is good .
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