GPR question.
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Elder User
Joined: Jul 2012
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From: Glen Rose, Texas
GPR question.
Did the GPR LED mod a bit back when I did my gauges, and all worked fine. Now it seems to flicker and maybe not come on upon tturning the key. Sometimes the light doesnt even come on till after I start it, then it seems to run the cycle. Looked at all connections and all are fine. But upon inspection where you hook up to the GPR seems really hot. Casing and all is warm, but the top bolts are hot. Is this normal, or could that be the problem?
Post Fiend
Joined: Sep 2003
Posts: 6,096
Likes: 26
From: Mesa AZ
Inside the relay is a round copper disk that is able to rotate on a center shaft. Sometimes a portion of the disk will develop arc spots while other spots are nice and clean. Each time the relay is activated, the disk is able to rotate a little bit. So, sometimes you get a good connection....sometimes you may not. Your LED is telling you that you have a worn out relay.
Thread Starter
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Elder User
Joined: Jul 2012
Posts: 947
Likes: 0
From: Glen Rose, Texas
Inside the relay is a round copper disk that is able to rotate on a center shaft. Sometimes a portion of the disk will develop arc spots while other spots are nice and clean. Each time the relay is activated, the disk is able to rotate a little bit. So, sometimes you get a good connection....sometimes you may not. Your LED is telling you that you have a worn out relay.
1. What brand?
2. Any upgraded ones?
3. How important is it right now since its summer in Texas?
Post Fiend
Joined: Sep 2003
Posts: 6,096
Likes: 26
From: Mesa AZ
Only important if you travel to high elevations. Working glow plugs are helpful at very high elevations even during the summer. My GPs were worn out and my truck would struggle to start at 8500 ft even when daytime temps were in the 70's. I put in a new set of glow plugs and it made all the difference.
Fleet Mechanic
Joined: Dec 2010
Posts: 1,546
Likes: 9
From: Wellington, Co
If you ever get in a pinch, you can us the AIH relay in it's place. That is right by it.
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Elder User
Joined: Jun 2007
Posts: 705
Likes: 1
From: Sandia Park, NM
I kept having bad luck with the Napa GPR109 so I went with the Stancor. I found it to be cheaper than OEM and just as reliable from reading others' experiences.
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Fleet Mechanic
Joined: Dec 2010
Posts: 1,546
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From: Wellington, Co
If you do OEM, go with Clay or Rock Auto. Both have great Motorcraft prices.
Glen Rose, near central Tx? 80-90* already? You have time.
Glen Rose, near central Tx? 80-90* already? You have time.
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Elder User
Joined: Jul 2012
Posts: 947
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From: Glen Rose, Texas
Well I went cheap locally and threw one of the Duralast on. It seems it was the problem cause the LED works fine now, and does not get hot. Now time to see how long it last.
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