Question about Minuteman PRO1500E/1500VA/1050W/USB/RS232 /AVR 6 BATTERY BACK-UP OUTLETS (0784755151827) UPS System

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99 chevy s10, fuel pump?

Drove fine in am, wouldn't start at lunch. All new from distrubuter to plugs, good spark. Fuel pressure reading 0, swapped fuel pump relay in fuse box with horn relay (same part number) horn still works. read about a fuel pump test wire under hood on the drivers side that could be jumped to battery to test fuel pump driver side but can't find it. similar models report relay being behind glove box but i don't see it there either. any more spcifics on this elusive test wire for this specific model? 99 chevy S10 ext. cab 4.3 L v-6? Any other easy ways to test fuel pump. also no codes showing on code reader. Read that oil pressure relay would take over pump relay with extended cranking, also did not work. truck will start breifly with starting fluid. No fuel pump can be heard with ignition being turned on (usually hear a 5-7 sec whine) all i hear now is a brief turning or valve sound similar to an automatic air freshener in a public resteroom. (2 brief spray sounds) but again no fuel pressure registers. That's about all the info I can give. please help!

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  • Anonymous Apr 07, 2009

    Your wire plug to the fuel pump isn't getting a connection, so you are gonna have to unplug it and move it around a little bit then plug it back it and then you should here the fuel pump come on. You can reach the plug from under the truck but there is 2 plugs so make sure you do the right one.

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This happened on mine and at first i had 4v at the harness going into the tank then it eventually went to 0v im prettysure thats why the pump burnt up but anyway after much head scrtaching i tied into the ground wire coming out of the tank and grounded it to the frame and the truck is running fine there vehicles are known for bad wire looms

Posted on Mar 07, 2011

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Have someone try starting the truck while you hit the bottom of the fuel tank with a hammer. if fuel pump is going bad the vehicle should start by doing this.

Posted on Mar 01, 2009

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