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Re: GM DIESEL
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Posted by Bob on April 03, 2006 at 07:23:00 from (64.21.249.40):
In Reply to: Re: GM DIESEL posted by Tx Jim on April 03, 2006 at 04:07:10:
Jim, What year is your 6.5? (I believe there are dome differences over the years in the fuel pump's power circuit.) Generally, the lift pump is powered during cranking, or when the oil pressure switch closes. The oil pressure switch switches POWER to the pump, not the ground. Some trucks have been modifed to bypass the oil pressure switch, so the pump runs all the time, and there's at least one outfit selling a harness and relay kit to power the pump, without the oil pressure switch having to carry the load.
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- 2000 Tx Jim 03:12:49 04/04/06
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