HELP!!! GPR Problem
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HELP!!! GPR Problem
just put in a new glow plug relay on my 2000 f-250 psd.......while putting it on i touched the two big terminals with a wrench ....now when i got to turn the key to start it.....i get nothing at all.......im hoping that one of the fuses/relays are blown.......is it possible one of the relays are blown......i checked all the fuses and they are fine......neeed help ..THANKS
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Relays don't blow like fuses. when u touched the two posts together that is what happens when the pcm turns on the glow plugs. You just did it manually.It should not have hurt the relay. Using a test light check the big posts on the relay. One is hot all the time and the one with 2 brown wires and another little wire is supposed to be hot with the key on. If not then check the little posts to see if one of them is hot when u turn the key on.
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Joined: Nov 2000
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From: Cincinnati, Ohio
This applies to the 94-97 trucks but should also work on the newer models. With key off you should have battery voltage to one large terminal and nothing to the other large or either of the small terminals.
With key on for the first two minutes or so you should have battery voltage to both large and one small terminal. The other small terminal should show ground. This shows the relay active.
With the key on and after the glow plug cycle has finished you should have battery voltage to one large and both small terminals. The computer activates the relay by grounding the second small terminal thus activating the relay.
It is possible to have battery voltage to both large terminals when the relay is active and still have a bad relay. If the contacts inside are pitted or corroded you may have low amp voltage passing through it but not enough power to actually run the glow plugs.
I have an MS Word document saved with both instructions (complete with pictures) from a fellow member of another board (Carpentractor) and the originating thread of my post when I replaced the glow plugs on my truck a while back. If you would like a copy send me an eMail with the information you need and what site you saw this on and I will reply with an attachment.
Dave / Believer45
With key on for the first two minutes or so you should have battery voltage to both large and one small terminal. The other small terminal should show ground. This shows the relay active.
With the key on and after the glow plug cycle has finished you should have battery voltage to one large and both small terminals. The computer activates the relay by grounding the second small terminal thus activating the relay.
It is possible to have battery voltage to both large terminals when the relay is active and still have a bad relay. If the contacts inside are pitted or corroded you may have low amp voltage passing through it but not enough power to actually run the glow plugs.
I have an MS Word document saved with both instructions (complete with pictures) from a fellow member of another board (Carpentractor) and the originating thread of my post when I replaced the glow plugs on my truck a while back. If you would like a copy send me an eMail with the information you need and what site you saw this on and I will reply with an attachment.
Dave / Believer45
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All Set
I got her all set yesterday.......went to go start her up this morning......it was about 10 degrees out cycled the glow plugs twice and she fired right up.......sure enough it was that dang GPR......thanks
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