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Old 02-27-2011, 12:41 PM
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testing GPR & GP

I'm having trounble during cold weather starts 15-40 deg (if i plug it up no trouble) 00 7.3
i've read on here how 2 test the GPR &GP & this is what i've got
GPR hot side reads 12V with key off...with key on it reads 11.2V & other side reads 10.70V is that common? some say a .2 drop from side to side says it is going bad I

GP I couldn't get the VC plug off but my meter has has needle points so i was able to just poke through the wire coating to get readings...2 of them read .8 6 of them read .6-.7 & the other 2 read .4....I'm thinking @ that rate 2 are bad

any help will be greatly appreciates!!!!
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Old 03-03-2011, 02:09 PM
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GPR test

Where di you find out how to test it? I have a 03 7.3lL. I am not sure that the glow plugs are working. I replaced the plugs last year. If the truck sits for 24 hours unplugged with the temp below 30 degs. it will not crank.
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Old 03-03-2011, 02:22 PM
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i typed in "how to test glow plugs" in the search box in the top right hand corner of the page & it brought up several threads about it & just searched till I found the right one...but basically there is a wiring harness on the top of each valve cover that goes inside the VC...unplug it and the 2 outter most studs (my wires are brown going into the harness)on each side of each harness are the GP wires & you test them with a muliti meter.. hope that helps.....i've not been having much luck getting people to respond to my questions
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Old 03-03-2011, 03:07 PM
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Quote:
Originally Posted by jrvance7 View Post
Where di you find out how to test it? I have a 03 7.3lL. I am not sure that the glow plugs are working. I replaced the plugs last year. If the truck sits for 24 hours unplugged with the temp below 30 degs. it will not crank.
Can't imagine this was hard to find....

Troubleshooting GPR & GP's
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Old 03-03-2011, 03:51 PM
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Thanks for your help. I tested like it said and had no voltage.
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