1 quick important question on GPR? - Ford Powerstroke Diesel Forum
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Old 12-02-2010, 01:44 PM
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1 quick important question on GPR?

Should the GPR always kick on when you start your truck? I just put a new GPR on and it was working in the garage lastnight and so I checked it today and it didnt kick on, Now my truck is at normal temp, its just hardd to start.
I thought the GLow plugs always kicked on for at least a few seconds everytime you turned the key on even if the motor is warm.. Or does ot only kick on when the motor is cold..

Please any help on this..
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Old 12-02-2010, 03:52 PM
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ok i let the truck cool off for awhile and went out to check the dc amps, I get 40 amps out of the yellow wire going to the driver side and 55amps out of the brown wire going to the pass side glow plugs. Is this asign I have a few bad GP's? I read your suspose to pull about 20 amps per Gp? I guess I need to ohm the GP's and see if they ohm out right?
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Old 12-02-2010, 04:15 PM
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No it won't ALWAYS turn on. But usually will. Unless it's very hot.
Amps is nothing. Check voltage. Then go to the GP wires and check ohms.
Troubleshooting GPR & GP's
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Old 12-02-2010, 04:50 PM
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I just did the test light test on the GP and 2 of them are bad. one on each side. So I guess I'll be ordering 8 new GP's. Im not going through the hassle of taking everything apart for just 2..

Thanks for your responce.
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Old 12-02-2010, 05:09 PM
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Test light? Use a real volt meter.
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Old 12-02-2010, 05:14 PM
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I did the volt meter, I just liked the test light test because it was quicker and easier to reach everything by myself.

Thanks for all the help.
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