Cold weather problems
Senior User
Joined: Mar 2007
Posts: 106
Likes: 0
From: Lone Tree, IA
Someone have a part number for the Stantor GP relay? Someone also suggested a Western Plow. I'm pretty sure mine needs replaced, though I'm doing the glow plugs and UVCH now anyway as two harnesses had pins burned up.
Cargo Master
Joined: Nov 2010
Posts: 2,797
Likes: 10
I will forwarn those stancores really are awesome, but if you have old worn VCGs, they typically cause the pins to burn out fairly quick. I have had a stancor for 4 years on new VCs and its been great, not a single problem since.
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Senior User
Joined: Mar 2015
Posts: 147
Likes: 0
From: Waterloo, Illinois
well i manged to get the multimeter on the gp relay today and when i turned the key the voltage was lower on the other post for a min but it started to climb and matched the voltage of the other post
i ain't rite
Joined: Mar 2005
Posts: 65,561
Likes: 5,599
From: Marlboro Mental Hospital.
it is possible the contacts in the GPR are shot like in the picture of the rotating disc, or you may have a dirty connection or corroded power wire on the hot side of the relay
Hotshot
Joined: Aug 2006
Posts: 10,764
Likes: 39
Why would that be ? 12v is 12v .?
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Senior User
Joined: Oct 2015
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Volts do not indicate amps. If a relay is old and has "iffy" connections, it can still carry 12 V, but the amperage passing through the relay will be reduced, as some of it turns to heat (in the relay) as a result of poor connection. The old, poor connections at the UVCH may handle that reduced amperage just fine. Then a person installs a nice new relay with great connections, and the amperage delivered to the UVCH is increase, and they are no longer happy.
i ain't rite
Joined: Mar 2005
Posts: 65,561
Likes: 5,599
From: Marlboro Mental Hospital.
Volts do not indicate amps. If a relay is old and has "iffy" connections, it can still carry 12 V, but the amperage passing through the relay will be reduced, as some of it turns to heat (in the relay) as a result of poor connection. The old, poor connections at the UVCH may handle that reduced amperage just fine. Then a person installs a nice new relay with great connections, and the amperage delivered to the UVCH is increase, and they are no longer happy.
a bad relay can send 12 volts but only 50 amps to the glow plugs through the under cover harness and they will be happy. the glow plugs may not work very good, but the UVCH will be happy.
now put a new stancor relay in the mix, and all of a sudden the UVCH is seeing 12 volts with 150 amps. it will get unhappy very quickly and let out all it's smoke
Senior User
Joined: Oct 2015
Posts: 320
Likes: 8
On a side note... if you've ever seen a smoke test kit, designed for finding air leaks and such. Well, we had a new tech at work and had him actually using one to try to "recharge" the smoke on a relay...
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