1994 Ford Explorer E.E.C fuse keeps blowing

EXPLORERGIRL94

MEMBER
1994 FORD EXPLORER
4 CYL
4WD
AUTOMATIC
140,535 MILES

My truck had problems starting a few months ago and when it finally did it cut out on my about 15 mins later after driving it around the corner from my house. So I got it towed back to my house. Turns out the fuel pump wasnt working so we changed the fuel pump but it still wouldnt start. The E.E.C fuse blows everytime I hook up the battery. The new fuel pump is fine, I changed out the eec relay and the fuel relay and the fuse is still blowning. Please help if at all possible can you tell me where to get a diagram of the wiring layout for my truck so I can see if there is a wire thats not grounded somewhere.

Friday, May 29th, 2009 AT 1:47 PM

1 Reply

JGAROFALO

MECHANIC
489 POSTS

If the fuse keeps blowing, you probably have a short to ground in the power dircuit. You can make a few checks here. Start by pulling the EEC power relay. See if the fuse still blows. If it does, you have a problem in the power distribution box. If not, you need to check the 12-volt supply wire for shorting to ground. This is a RED wire that goes through the EEC system to provide power to the injectors, HEGO sensors, and some of the actuators. Disconnect the 60-pin connector at the EEV processor, and check for short to ground at pins #1, #37, and #57.

You can get a halfway decent diagram in the Haynes manual for your car, or in the Ford Electrical and Vacuum troubleshooting manual. The Haynes manual is easier to get, and a lot less expensive. You can get the Ford manual from places like eBay.

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Saturday, May 30th, 2009 AT 5:09 AM