1999 Chevy Truck Fuel Pump Fuse keeps burning out

VICLOPE

MEMBER
1999 CHEVROLET TRUCK

Electrical problem
1999 Chevy Truck V8 Two Wheel Drive Automatic

My fuel pump fuse keeps burning out when I turn the ignition on and the car won't kick over. I have been through five fuses. Thank you in advance for any help you can give me.

7 Replies

MASTERTECHTIM

MECHANIC
4,749 POSTS

What model truck? Engine size? Exactly what fuse?

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Monday, November 10th, 2008 AT 8:23 PM

VICLOPE

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4 POSTS

It's a 99 chevy suburban 5.7 two wheel drive. It's the fuse for the fuel pump 20 amp. When I turn the key it the fuse burns out.

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Monday, November 10th, 2008 AT 8:31 PM

MASTERTECHTIM

MECHANIC
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The wiring schematic im looking at is the ecmb fuse. are we talking about the same fuse?

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Monday, November 10th, 2008 AT 8:37 PM

VICLOPE

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It's ECM-1 when I started the suburban this morning it hesitated before starting but started (it never did that before). Then when I tried to start it after work it wouldnt start so I checked the fuse because this happened before, the fuse was burnt so I replaced it. Then it burned out five more fuses before I gave up and called a tow truck.

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Monday, November 10th, 2008 AT 8:52 PM

MASTERTECHTIM

MECHANIC
4,749 POSTS

There are only a couple possibilities according to the wiring diagram. The wire feeds the fuel pump relay and goes directly to computer. I have never seen a problem with wiring to computer but I have seen a ton of problems with fuel pumps and wiring to the fuel pump. Start by unplugging fuel pump at the fuel tank and see if the short goes away, if it does then the problem is in the fuel tank, if the short is still there then the gray wire from the relay to the fuel pump is shorted to ground. **The gray wire also goes to the oil pressure sending unit so check wiring there also.