Jeep electrical problems

Tiny
REDNEX18
  • MEMBER
  • 1999 JEEP GRAND CHEROKEE
  • 142,000 MILES
Hi I have a 1999 jeep grand cherokee laredo I went to hook up a wire into the fuel pump relay witch actually runs the fuel pump cause there was a short in the fuel pump wire some were so I wired it that way. And then I went to hook another wire up to the same one and went to start it and it wouldnt start and all the guages are not working but the fuel pump is still working
Sunday, September 30th, 2012 AT 9:55 PM

5 Replies

Tiny
ASEMASTER6371
  • MECHANIC
  • 52,796 POSTS
Thats because there is more on the circuit than just the pump.

There is a asd relay that feeds the fuel pump relay and the pcm grounds both relays. It needs to be checked for wiring and possible failures.

Roy
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Sunday, September 30th, 2012 AT 10:10 PM
Tiny
REDNEX18
  • MEMBER
  • 9 POSTS
Alright thank you were is that asd relay and and the ground for the pcm cause I no its a short some weres
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Sunday, September 30th, 2012 AT 10:17 PM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,796 POSTS
The asd relay is next to the fuel pump relay in the fuse box. The ground is internal in the pcm

Roy
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Sunday, September 30th, 2012 AT 10:21 PM
Tiny
REDNEX18
  • MEMBER
  • 9 POSTS
Oh ok so by changing or seeing if the asd relay is bad could be the problem
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Sunday, September 30th, 2012 AT 10:23 PM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,796 POSTS
You need to verify the powers and grounds to see if the proper signals are being sent.

Check the wiring diagram
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Sunday, September 30th, 2012 AT 10:27 PM

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