glow plug relay
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Junior User
Joined: Jan 2006
Posts: 51
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glow plug relay
I have a question about the glow plug relay. I tested it becuase the truck will not start when it is cold at any temp between 20-50 in the last month. The relay has 12volts on one termanal and nothing on the other side when you turn the key on so i know that it is bad. My queston is why when you plug the truck in it will start because the block heater is only heating the collant. I am wondering what the connection is between the block heater and the glow plugs. Thank you for the help.
Laughing Gas
Joined: Feb 2006
Posts: 947
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When you plug the block heater in it does exactly that. The engine stays heated while the truck is off and when you go to stat it you don't need the gps to heat the cylinder to ignite the diesel. Diesel uses compression and heat to ignite instead of a spark like gassers. The gps heat the cylinders when the engine is cold, if you plug your truck in the cylinders are already heated so the gps don't have to do there job.
Post Fiend
Joined: Feb 2006
Posts: 11,892
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From: Middle Tennessee
Scotty, just jump the large posts for about 30seconds with a screw driver or similar item with the key on in the WTS mode. Then it should light right off. If not, it could be more than just the relay. Also, do this with it cold and without the block heater to verify the test.
Post Fiend
Joined: Feb 2006
Posts: 11,892
Likes: 2
From: Middle Tennessee
Originally Posted by generalee31184
If the has already been running and may still be warm, and I test the glow plug relay should it still trip at all? Cuz I am having the same trouble right now
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Junior User
Joined: Jan 2006
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Hi sorry it took so long to get back to you guys but i finly got the glow plug relay 109 and installed it yesterday. went out this morning and the truck fired right up. Everyone was such a great help with this problem. thanks again.
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Postmaster
Joined: Jun 2005
Posts: 3,438
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From: New Hampshire
Originally Posted by BrianKosh
I see all of you saying that the glow plug relay is fairly cheap, but I was quoted $ 236.00. Are they quoting me a price for the wrong part?
Posting Guru
Joined: Sep 2006
Posts: 1,081
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From: Montana
I was quoted $120, from the stealership, but got one off E-bay for $45. so I will just buy to for one being a back up like the CPS, fuel treatment etc. same motorcraft part. NAPA was $71.
I am changing mine out this weekend also, cause its Montana and you never know when the Zero temps decide to come visit.
I am changing mine out this weekend also, cause its Montana and you never know when the Zero temps decide to come visit.
Post Fiend
Joined: Feb 2006
Posts: 11,892
Likes: 2
From: Middle Tennessee
Originally Posted by MTDewX
I was quoted $120, from the stealership, but got one off E-bay for $45. so I will just buy to for one being a back up like the CPS, fuel treatment etc. same motorcraft part. NAPA was $71.
I am changing mine out this weekend also, cause its Montana and you never know when the Zero temps decide to come visit.
I am changing mine out this weekend also, cause its Montana and you never know when the Zero temps decide to come visit.
There is also Guzzle's mega mucho mondo relay.
Posting Guru
Joined: Sep 2006
Posts: 1,515
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From: Jasper, MO
Originally Posted by Tenn01PSD350
There is also Guzzle's mega mucho mondo relay.