How JustAnswer Works:

  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site.
    Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.

Ask Kevin Your Own Question

Kevin
Kevin, Owner Kevins Mobile repair Atlanta
Category: Jeep
Satisfied Customers: 308
Experience:  14 years dealer trained, Master Electrical,AC,Body Mechanical, Drive ablity.
10702820
Type Your Jeep Question Here...
Kevin is online now
A new question is answered every 9 seconds

2000 jeep grand cherokee: relays..check engine light...ignition switch

Resolved Question:

2000 jeep grand cherokee inline 6.While trying to hard wire a switch to turn on the radiator fan a friend of mine poked a wire to see if it had juice at key on position.From the driver seat i heard a pop.All the fuses and relays are good still,but wont start unless i backfeed juice from the battery to the wire he was poking.When i engage the switch i put in it turns on the fuel pump(i can hear it turn on)and the fuel guage and the truck run fine except for the check engine light.I have replaced the ignition switch no help.Can anyone help with this problem?
Submitted: 5 years ago.
Category: Jeep
Expert:  Kevin replied 5 years ago.

Welcome to teh site my name is Kevin

go back and chk all the fuses and for god sake dont let him monkey with the fan any more replace the relay for the fan for 80 bucks and U wont have this kinda issue again.

The fuses under the driver sai dash there are a few there.

Which wire was he poking ne way?

Customer: replied 5 years ago.
I think it was the fuel pump wire in the harness located in front of the pcm,not the wires connected to the pcm.The floating harness that runs underneath the PDC
Expert:  Kevin replied 5 years ago.

why would he mess with the fuel pump wire for the fan?

 

fuse 12 10 amp is for the fuel pump under the driver side dash

Customer: replied 5 years ago.
He wanted to have the fan turn on when i turned on the truck.All the fuses are good ive checked all of them many times ive been driving the truck for 6 months like this but inspection comming up need to get the check engine light off.Its been on a code reader and it throws codes 0130,0136,0443,1687 like i said the truck runs fine with that backfeed through that wire
Expert:  Kevin replied 5 years ago.
what wire color was it?
Customer: replied 5 years ago.
orange and dark blue
Expert:  Kevin replied 5 years ago.

that wire is for the control side of the fuel pump. the power supply comes from teh IGN switch to a fuse 12 10 amp under the driver side dash then to the fuel pump and also goes to the PCM. so my susgestion is to trace it from teh ign switch to the fuse then from teh fuse to the fuel pump relay then to the pcm see if u have a brunt up wire ,blown fuse or burnt up ign switch connector.

tell me again u have checked the fuses under the hood and dash? how are u looking at them with a test light or pulling them out?

Customer: replied 5 years ago.
Ive checked them both ways in both locations.Ive also changed the ignition switch it was only 35 bucks so i figured ill try it no change.I also took it to a local certified mechanic,he said it had something to do with the auto shutdown relay circiut and i should take it to the dealer.Could something have happened to the pcm?
Expert:  Kevin replied 5 years ago.

U said it runs when u add power to the wire that wire is just power to the fuel pump relay and IGN switch feed to the pcm if they had gotten damaged from it it would not run regardless if u add power to it or not. It is also part of the ASD control.

Here is the down and dirty U dont have power on a wire that should have power when u turn the ign switch on start at the switch with a test light or volt meter and back prob see if U have power at the ign switch on the same orange and blue wire

Customer: replied 5 years ago.
And if ther is no power at the ign switch when the key is on what then?
Expert:  Kevin replied 5 years ago.

power for it comes from a 40 amp fuse under the hood

there is a simple explnation for this I just need to know things are being done right over there

Customer: replied 5 years ago.
Im no electrician thats for sure.And it is 1130 pm right now and i cant do any tests.Do you think i should just run new wire the whole way from the ignition switch to wherever that orange and blue wire runs?Or would the placement of the feed wire i installed give an indication of where the short is?Also i just remembered my mechanic saying something about one leg of the fuel pump relay in PDC having no juice until i hit the switch.I have a haynes manual and it looks like the fuel pump relay and the asd relay are connected could that be the spot?
Expert:  Kevin replied 5 years ago.
I would start with the ign switch chk for power there and then trace back to the fuel pump asd side. U have a wire diagram if not use this one graphic
Customer: replied 5 years ago.
So basicly take a test light and check for power at the ign switch then for power at the fuse box inside then at the box under the hood anywhere else?And if i find no power at any of these points replace the wire itself?
Expert:  Kevin replied 5 years ago.
chk that part first then get back to me tommarow
Customer: replied 5 years ago.
Hows that work first time on this site do i accept and pay again tommorow?
Expert:  Kevin replied 5 years ago.
no there is only one accept time it will stay open until it times out no activity
Customer: replied 5 years ago.
Of course its raining today and i have no garage to work in.I will try to check it out tuesday morning.I thank you for your paitence and i promise i will accept your answer so you get paid for your time.I feel like we are zeroing in on the problem.What is the fix if there is no power at the ignition switch?
Expert:  Kevin replied 5 years ago.
a 40 amp fuse or a wire from the fuse to the ign switch
Kevin, Owner Kevins Mobile repair Atlanta
Category: Jeep
Satisfied Customers: 308
Experience: 14 years dealer trained, Master Electrical,AC,Body Mechanical, Drive ablity.
Kevin and 9 other Jeep Specialists are ready to help you
Customer: replied 5 years ago.
Hey man youve done it.Great help all is fixed.I tested everything and all was good, got confused,decieded to go over the fuse panel AGAIN sure enough found a blown fuse replaced it everything works.Im really thankful for your help,and will refer you to everyone that has any jeep/chrysler problems.

JustAnswer in the News:

 
 
 
Ask-a-doc Web sites: If you've got a quick question, you can try to get an answer from sites that say they have various specialists on hand to give quick answers... Justanswer.com.
JustAnswer.com...has seen a spike since October in legal questions from readers about layoffs, unemployment and severance.
Web sites like justanswer.com/legal
...leave nothing to chance.
Traffic on JustAnswer rose 14 percent...and had nearly 400,000 page views in 30 days...inquiries related to stress, high blood pressure, drinking and heart pain jumped 33 percent.
Tory Johnson, GMA Workplace Contributor, discusses work-from-home jobs, such as JustAnswer in which verified Experts answer people’s questions.
I will tell you that...the things you have to go through to be an Expert are quite rigorous.
 
 
 

What Customers are Saying:

 
 
 
  • Thank you so much for your answer. My initial estimate was $325; I got it done for $100 - part and labor. Lynn B. Ormond Beach, FL
< Last | Next >
  • Thank you so much for your answer. My initial estimate was $325; I got it done for $100 - part and labor. Lynn B. Ormond Beach, FL
  • I was skeptical at first but thought I'd give it a try. I was pleasantly surprised. Your site actually is a quality service that I would recommend to others in a heartbeat. Stan Sayre, PA
  • Wonderful service, prompt, efficient, and accurate. Couldn't have asked for more. I cannot thank you enough for your help. Mary C. Freshfield, Liverpool, UK
  • This expert is wonderful. They truly know what they are talking about, and they actually care about you. They really helped put my nerves at ease. Thank you so much!!!! Alex Los Angeles, CA
  • Thank you for all your help. It is nice to know that this service is here for people like myself, who need answers fast and are not sure who to consult. GP Hesperia, CA
  • I couldn't be more satisfied! This is the site I will always come to when I need a second opinion. Justin Kernersville, NC
  • Just let me say that this encounter has been entirely professional and most helpful. I liked that I could ask additional questions and get answered in a very short turn around. Esther Woodstock, NY
 
 
 

Meet The Experts:

 
 
 
  • Mark

    22 Year Factory trained technician

    Satisfied Customers:

    2548
    Jeep factory training........25 years in the industry.
< Last | Next >
  • http://ww2.justanswer.com/uploads/MO/MoparCertified/2012-6-7_4142_mechanic.64x64.jpg Mark's Avatar

    Mark

    22 Year Factory trained technician

    Satisfied Customers:

    2548
    Jeep factory training........25 years in the industry.
  • http://ww2.justanswer.com/uploads/jeep10000/2008-9-18_222938_192601.jpg Chris's Avatar

    Chris

    Shop Foreman

    Satisfied Customers:

    2265
    Jeep and ASE Certified Master Tech
  • http://ww2.justanswer.com/uploads/ke4ich/2009-08-12_212931_DSC02211.JPG moparfl's Avatar

    moparfl

    ASE Certified Technician

    Satisfied Customers:

    1128
    ASE Master Tech Chrysler Dodge Jeep Master Tech
  • http://ww2.justanswer.com/uploads/nvltgo/2010-10-18_211525_youranswers.jpg Dave's Avatar

    Dave

    Jeep Master Tech

    Satisfied Customers:

    1120
    Chrysler Triple Master, ASE master Tech AA degree in Auto.
  • http://ww2.justanswer.com/uploads/tsmodie/2009-6-10_144056_tim.jpg Tim Mohr's Avatar

    Tim Mohr

    ASE MASTER TECH

    Satisfied Customers:

    805
    30 YRS EXPERIENCE, FOREIGN AND DOMESTIC, GAS AND DEISEL
  • http://ww2.justanswer.com/uploads/CD/CDJMastertech/2012-6-9_201455_JustAnswerProfilelarger.64x64.JPG CDJMasterTech's Avatar

    CDJMasterTech

    Jeep MasterTech

    Satisfied Customers:

    576
    Factory trained and certified Jeep Master Technician, ASE Master Technician
  • http://ww2.justanswer.com/uploads/jeepmopar76/2009-3-18_2204_63998760.jpg jeepmopar76's Avatar

    jeepmopar76

    Jeep/Chrysler Triple Master Tech

    Satisfied Customers:

    572
    32yr ASE Master Tech, 9yr Chrysler Master Tech, 19 yr Jeep Dealership service including AMC/Eagle