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sprinkles08, ASE Certified Technician
Category: Australia Car
Satisfied Customers: 22660
Experience:  ASE Master and Advanced level certified. Factory trained with 15 years dealership experience
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My 2003 wg/wj 4.7 grand Cherokee keeps blowing the fuel pump

Customer Question

Hi, my 2003 wg/wj 4.7 grand Cherokee keeps blowing the fuel pump fuse
JA: Do all the fuses have the correct amperage for the circuits they're in?
Customer: Yes
JA: What is the make/model/year of your car?
Customer: 2003 Jeep Grand Cherokee
JA: Are you fixing your Grand Cherokee yourself? What have you tried so far?
Customer: I have replaced oxygen sensors as there was an engine light up for that. The lights off now but the fuse keeps blowing. I put a new pump in the tank maybe 4 months ago..
JA: Anything else you want the mechanic to know before I connect you?
Customer: There is an abs light up but I have found the Brocken wire under the car for that
Submitted: 8 months ago.
Category: Australia Car
Expert:  sprinkles08 replied 8 months ago.

Hello and welcome to JustAnswer!

I'm assuming it's fuse 24 in the power distribution center that's blowing, which is the fuse that supplies power to pin 30 of the fuel pump relay. If this fuse is blowing it is either due to high current draw from the fuel pump itself or a short to ground in the wiring between the relay and pump. If the fuse is blowing constantly and no wiring problems are visible then try unplugging the pump and see if the fuse blows when the key is turned on. If not then the issue is the pump, if it still blows then the problem is in the wiring.