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Paul M ASE Master
Paul M ASE Master, ASE Master Tech
Category: Jeep
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Experience:  ASE Master Tech 20+ Years
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2006 Jeep Grand Cherokee, 6 cyl wont start; engine does not

Customer Question

2006 Jeep Grand Cherokee, 6 cyl won't start; engine does not crank. Dashboard does not illuminate, but you can hear the cabin fan clicking. Power windows/locks not getting power.

Lately, the vehicle would only turn over when starting if you gave it gas. After starting, the car would stall without gas pedal applied. Once in drive, the car would idle fine at stop signs/lights.

Today I went for a short drive...the initial start up was as mentioned before. Enroute to my destination, the dashboards lights mostly all inlluminated (ABS, Check Eng, etc) and the odometer was flickering; there was a clicking noise from under the passenger side dashboard. I shut down the car in the parking lot after the 5 minute trip and when I came back, the car wouldn't even crank.

In the months prior I had battled a random misfire code that only came on when accelerating onto the freeway. I replaced the coil pack,completed the Chrysler recall procedure for carbon buildup on the exhaust valves...nothing
Submitted: 4 years ago.
Category: Jeep
Expert:  Paul M ASE Master replied 4 years ago.

Hello and thank you for using Just Answer

 

sounds like your alternator may have gone out

 

this will cause all the lights to come on because voltage is low and will also explain a no crank

 

have you put a meter across the battery? you should have around 12.5 volts

 

also have you tried jumping it with another vehicle?

let me know

 

Paul

Customer: replied 4 years ago.
I was able to jump start it and get it back to my house. I removed the alternator and took it to the parts store for testing. they ran the test 3 times and the alternator passed every time...
Expert:  Paul M ASE Master replied 4 years ago.

if jump starting it worked

 

you either have an alternator that is failing intermittently or a high draw on the starter

 

I would suggest you have the battery load tested when it won't start

 

sometimes alternators will test ok but when installed and get warm they can fail

 

I would put a meter across the battery and run the truck with the high beams and blower on high and see if the alternator maintains over 13.3 volts

 

the alternator is best tested on the vehicle

 

Paul

Customer: replied 4 years ago.

Hooked everything up and ran the car like you said....when I started, the alternator was charging @ 13.30 volts....after 15 minutes it's down to 12.75. Does this confirm that it's a failing alternator?

Expert:  Paul M ASE Master replied 4 years ago.

yes the alternator should not drop bellow 13 with all loads on

 

the alternator is not keeping up with the load.

 

Paul

Customer: replied 4 years ago.
what about the problem idling problem in the morning when I first start up the car...is problem linked to this somehow?
Expert:  Paul M ASE Master replied 4 years ago.

I would start by replacing the alternator

 

if the idle problem continues you may need to check the Idle Air Control Motor

 

Paul

Paul M ASE Master, ASE Master Tech
Category: Jeep
Satisfied Customers: 4682
Experience: ASE Master Tech 20+ Years
Paul M ASE Master and 4 other Jeep Specialists are ready to help you
Customer: replied 4 years ago.
Thanks Paul. You've been a great help!
Expert:  Paul M ASE Master replied 4 years ago.

No Problem

 

thank you for using Just Answer

 

Paul

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