What is the Computer looking thing behind the GPR on a 2003 7.3

[Ken w]

Idk the truck won't start if it's cold not plugged in but I just checked the GPR has 12v going in and turn key on 0 coming out so prob start there right . Thanks guys for getting back to me quick I just joined today best thing I've ever done I have a 99 that I asked 3 questions on today and this has been a huge help the 03 is my friends truck just asking for him thanks again


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[2000-7.3L]

Originally Posted by Ken w

Idk the truck won't start if it's cold not plugged in but I just checked the GPR has 12v going in and turn key on 0 coming out so prob start there right . Thanks guys for getting back to me quick I just joined today best thing I've ever done I have a 99 that I asked 3 questions on today and this has been a huge help the 03 is my friends truck just asking for him thanks again


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WELCOME!!

[None2Slow]

Sounds like your relay is bad.

Read here if you haven't already. It's the first thing I did here...



Troubleshooting GPR & GP's

[Ken w]

Ya that's what I was thinking to


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[Justin@DP-Tuner]

That box is the Glow Plug Control Module(GPCM). It controls the glow plugs just like a relay would. If your truck has a GPCM you do not have a glow plug relay. The GPCM takes place of the relay. They put it on California model Super Duty trucks and Excursions. Ford did it to try to cut down emissions.


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[Ken w]

Ok thank you for that info do you know how much a new one is


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[Ken w]

Also the relay in front of the GPCM witch we thought was the GPR I guess is the intake heater we put a new one in but it still has 12v coming in and 0 out how do you test that relay


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[jesilvas]

Aih isn't gonna affect starts

I made my Samsung SGH-I997 send this.

[Justin@DP-Tuner]

Originally Posted by Ken w

Ok thank you for that info do you know how much a new one is


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I believe they are around $170 from Ford. Are you sure that is your problem though? Are you getting any glow plug codes?

With the GPCM, a code will be thrown if there is a fault in the glow plug system.

[Ken w]

Ok so theres no way of checking it just see if it through a code


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