1994 Jeep Laredo

Tiny
SACREDBLONDE
  • MEMBER
  • 1994 JEEP LAREDO
Electrical problem
1994 Jeep Laredo 6 cyl Four Wheel Drive Automatic

new fuel pump new relay, and no power to fuel pump fuel pump does work, jumped it no pwr to connector
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Sunday, February 21st, 2010 AT 12:08 PM

7 Replies

Tiny
CARADIODOC
  • EXPERT
How and where did you jump it? Do you have spark?

Caradiodoc
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Wednesday, February 24th, 2010 AT 2:48 AM
Tiny
BEEF99
  • MEMBER
Try replacing the ASD relay that is in the power control box on the passenger side under the hood. ASD relay is you Automatic Shutdown Relay, they only cost about $8
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Sunday, February 28th, 2010 AT 11:39 AM
Tiny
CARADIODOC
  • EXPERT
First let's find out whats going on before throwing parts at it. 90 percent chance spark is missing too. That negates a fuel pump issue, and we don't know what is meant by "jumping it". Crankshaft position sensors fail WAY more often than relays. A real simple test for people who understand how the circuit works is to measure the voltage on the two small wires on the back of the alternator. If battery voltage is there for up to two seconds after turning on the ignition switch, the ASD relay is working and the computer has control of it. Real simple. Real fast. But we haven't established the owner understands the procedures and required observations.

If you reread the original post, you will see there is no indication yet the owner knows how the system works, we have no idea what is meant by "jumped", and new parts already didn't solve the problem so we don't know what, if any diagnostics were done. Obviously the train left the tracks somewhere, so, ... Sacredblonde, ... Have you checked for spark yet?
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Sunday, February 28th, 2010 AT 12:05 PM
Tiny
BEEF99
  • MEMBER
You do not have to buy a relay, just take one out of the other slots as they are all the same, that is a good thing Jeep did. Take one out of the other slots such as ABS or something and try it in the slot where your ASD relay goes. This will tell you whether or not your relay is bad because if it starts, then you know the other one was bad. If you do not have power still, try checking your neutral safety switch. If all power is lost everywhere such as your ignition and fuel pump then it could be any connections coming from the battery or it could be your computer malfunctioning. These are good areas to check on Jeeps as theses problems are common causes for them. That is where I would start.
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Sunday, February 28th, 2010 AT 10:07 PM
Tiny
CARADIODOC
  • EXPERT
Enlighten us on how a neutral safety switch prevents a fuel pump from running?

And we still haven't heard what was jumped and if other circuits are working.
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Monday, March 1st, 2010 AT 7:14 AM
Tiny
BEEF99
  • MEMBER
The moderator is correct when we communicated, I am not try to confuse anyone on here with some technical issues before we get the questions answered first. I will resign my response and let the moderator help you.
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Wednesday, March 3rd, 2010 AT 1:35 PM
Tiny
CARADIODOC
  • EXPERT
Back it up to the beginning and notice we have never received an answer to a single question. We don't know what was tested, and we don't know how, so there is no way to jump to any conclusions. I've been tearing the service manual apart. This is a standard Chrysler ASD system and we still don't have enough information to provide any kind of answer.

As for your personal comments. Keep it professional. This is not the place to use your disrespectful attitude on people who are only trying to help a new friend.

Caradiodoc
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Wednesday, March 3rd, 2010 AT 3:17 PM

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