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Glow plug controller??

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Glow plug controller??

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Old

Jan 31, 2009 | 11:53 AM

#1

RP27G8G

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Glow plug controller??

I don't believe my GPC is working since I can't hear it cycle and the truck is almost impossible to start when cold but is fine when plugged in. I did bypass the two power wires around the plastic connector so I know I have good power. Is there a way to test the controller or solenoid? If it's bad do I just replace the solenoid or the whole controller? Thanks in advance!

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Old

Jan 31, 2009 | 04:50 PM

#2

RP27G8G

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Somebody has to know the answer to this...

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Old

Jan 31, 2009 | 05:25 PM

#3

cstronko

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The solenoid is easy. If it is working it should power to the glow plug harness side when the controller activates. I'm not sure on the controller. I bypassed mine and went to a switch. It is easy and the diagram is on this site if you search it. Just be careful not to hold the switch more than 5 -7 seconds. You do not want to burn the glow plugs out. There is a ton if info on this topic on the site. All you need to do is search glow plugs under the 6.9 topic.

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Old

Jan 31, 2009 | 11:03 PM

#4

91f2504x4

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Joined: Oct 2003

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From: KY

Quote:

Originally Posted by RP27G8G

I don't believe my GPC is working since I can't hear it cycle and the truck is almost impossible to start when cold but is fine when plugged in. I did bypass the two power wires around the plastic connector so I know I have good power. Is there a way to test the controller or solenoid? If it's bad do I just replace the solenoid or the whole controller? Thanks in advance!

What year is your truck? You can start by checking to make sure that one of the big contacts has constant 12v going to it, then depending on which controller you have, you can excite the solenoid and make sure that the other big contact has 12v. If you are getting current there, then you can check to make sure that you are getting current to the glow plugs connectors, I would also check the ground for the glow plug controller. Check those few things and then post back with what you have found.

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Old

Feb 1, 2009 | 06:00 PM

#5

RP27G8G

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Thanks guys!! I'll check the connections and voltage. I have read there is a ton of amperage going through those wires. My guess is the constant 12v is key on only. I'll check and post back.

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bypass, controller, glow, plug

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