Extra GPR
Cargo Master
Joined: May 2010
Posts: 3,047
Likes: 10
From: Snohomish, WA
Testing of the GPR is pretty straight forward. If you turn the key on and you have power to the two large posts it is good. If you only have power to one of the posts, and you can hear it click on, the relay is shot.
You may have a worn contact if you hear it click and do not get power to the GP post. That is what was happening on this GPR.
You may have a worn contact if you hear it click and do not get power to the GP post. That is what was happening on this GPR.
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Elder User
Joined: Aug 2009
Posts: 574
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From: Vader
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Junior User
Joined: Dec 2007
Posts: 88
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From: Magnolia Texas
I was going through a GPR each winter in my 99.5 PSd and upgraded to a stancor and its been great for the last three years! This forum is great when it comes to problem solving and replacement items for teh trucks! Actual experience with parts and problems beats teh dealer any day!
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Go Bills !
Joined: Jan 2008
Posts: 2,778
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From: Buffalo, NY
You can also use your AIH heater relay to try. If the E99 has one.
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Elder User
Joined: Aug 2009
Posts: 574
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From: Vader
Ok, so I replaced the GPR with the used replacement, but before I disco'd I tested one more time, hot volts were 12.54, other post after turning on key 10.45, after replacing with used one, 2nd post was 11.15v, should this be higher? Will the Stancor let more Volts through, maybe a battery deficientcy?
Cargo Master
Joined: Feb 2010
Posts: 2,298
Likes: 94
From: Delta, CO
Ok, so I replaced the GPR with the used replacement, but before I disco'd I tested one more time, hot volts were 12.54, other post after turning on key 10.45, after replacing with used one, 2nd post was 11.15v, should this be higher? Will the Stancor let more Volts through, maybe a battery deficientcy?
