Grand Cherokee Turn Signal Problem

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  #1  
Old 09-08-10, 09:37 AM
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Grand Cherokee Turn Signal Problem

I have a 2001 jeep grand cherokee that has turn signals that intermittantly work, and then don't work. the 4 way flashers work at all times. Anyone have experience with this problem?

thanks

Ed
 
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  #2  
Old 09-08-10, 11:56 AM
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Most common is failure of turn signal switch (multi function switch).

Possibility of turn signal flasher issue. Flasher is in junction block (fuse panel), front seating area, driver side, under dash, Flasher is light blue.

There may be a "TSB" out. Have a dealer run your "VIN"


Multi-function switch removal

Disconnect and isolate the battery negative cable.
Wait two minutes for the airbag system reserve capacitor to discharge before performing further diagnosis or service.

From below the steering column, remove the three screws that secure the lower steering column shroud to the multi-function switch mounting housing.

Using hand pressure, push gently inward on both sides of the upper shroud near the parting line between the upper and lower shrouds to release the snap features that secure the two shroud halves together.

Remove both the upper and lower shrouds from the steering column.

Remove the Steering Control Module (SCM) from the steering column.

Remove the two screws that secure the left multifunction switch to the SCM .

Disengage the two retaining tabs , next to the screw mounts that secure the left multi-function switch to the SCM.

Disconnect the left multi-function switch from the SCM.



To install:

Position the left multi-function switch onto position on the Steering Control Module (SCM).

Engage the two retaining tabs, next to the screw mounts that secure the left multi-function switch and firmly snap into place.

Install the two screws that secure the left multifunction switch to the SCM. Tighten the screws to 22 inch lbs.

Position the lower steering column shroud to the underside of the steering column.

Install the three screws that secure the lower steering column shroud to the multi-function switch mounting housing. Tighten the screws to 17 inch lbs.

Position the upper column shroud over the steering column with the hazard warning switch button inserted through the hole in the upper shroud.

Align the snap features on the upper and lower shrouds and apply hand pressure to snap them together.

Reconnect the battery negative cable.
 
  #3  
Old 09-08-10, 02:59 PM
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I would get a factory wiring diagram and test with a multimeter. You can order wiring diagrams from your dealer.

How to use a multimeter...
how to use a multimeter on a car - Google Search

The reason you need a wiring diagram is all the wires are typically wrapped up in bundles and hidden. You can't trace what wire goes where. So you need something to tell you what wire is for what, where the wires are for the circuit, and which wire is which on various connectors.

And before doing that, be sure you have the correct bulbs installed. If you have owned the vehicle since brand new and never replaced the bulbs, then that would not be the problem.

If someone else owned it, then they may have installed the wrong bulbs. Also LED replacement bulbs will cause problems if they don't have the correct "resistance".
 
  #4  
Old 09-08-10, 03:40 PM
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Location: Washington PA
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Problem solved!

the problem was a bad flasher/turn signal relay. I found some info on another forum and discovered the flashers and turnsignals are in the same relay on my vehicle. Relay price is $48.00. As you know, you cant return electrical components, and I wouldn't know if it was this relay or not until I bought it.

However, this guy said he took his relay apart and found some hair line cracks at the solder joints to the relay spades, re-heated them, put it back together and bingo! turn signals.

I followed the instructions and it worked for me too.

I hope its ok to post a link this solution:

Turn Signal works occasionally - Car Forums and Automotive Chat

thanks for your help

Ed
 
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