Shop Jeep Turn Signals

To confirm unplug the connector from the turn signal switch. With ignition on take a jumper and jump between red/white pin 5 to dark green/red pin 9. This will cause the left rear turn lamp to illuminate. Check for power on brown/red pin 3. If you don't have power, jumper red/white pin 5 to light green/white pin 10. This will cause the left front turn signal and marker lamp to illuminate. Check for power on brown/red pin 3. If you don't have power, replace the switch.

If you have power on brown/red pin 3 anytime during those two test, you have short in the wiring.

I had the exact same problem w/ my 2001 Jeep Grand Cherokee. Fairly simple fix. It is the flasher relay, OEM Mopar Part #4686094, pay around $45 for the part at the dealer.
Take kick plate trim off (3 screws and clips holding it on) remove fuse cover (pops off) remove plastic shroud in front of steering wheel below the instrument gauges(pops off) remove large plastic shroud under steering wheel, (2-10mm bolts, clips and one phillips screw holding in place). Relay will be above fuse box, very tight fit but with a little nudging and nimble fingers pop out the old relay and replace with new one. Re-install all equipment in reverse order. Solved my turn signal problem immediately. Good luck

just fixed this problem on my 2003 grand cherokee. it's the combination relay switch. the only thing i can add to the tight squeeze situation that you mentioned is that the entire junction block that holds the fuses and relay switches can be loosened and lowered enough to pull the switch out without needing small or nimble fingers. there are 2 10mm bolts on the junction block that should be removed. once they are removed, pull the entire box downward, it is held on by 2 clips. you'll have access to the relay with no problem. once changed, push the junction box upward, aligning the 2 clips into the holes that they go into. jeep recommends that you disconnect the negative battery cable and wait 2 minutes before tinckering with the relays. included here is an attachement with an illustration of the entire box and the 2 clips that i'm talking about, it will help you understand how this is attached. thanks all for the tips.
also goto wjjeeps.com then interior trim moldings and bezels, steps 4 and 5 to see how to remove the covers and trim to access the junction block.

good luck all

Please start your own thread with your exact vehicle. We can't read the whole thing with other vehicles to guess on yours based on "exactly like above" as your description. Start one all your own - it's free!

T

Hi Benny, I have the SAME exact problem with my 2000 Grand Cherokee! It is NOT the multifunction switch, I just purchased one (OEM) from Jeep and put it in myself, still have the same problem. When the problem started it only quit periodically, now it works less and it's a bonus when it does work... and same thing as you, only sometimes does the hazard trick work. Yesterday, I did the hazard trick and it started to blink and then just stopped.
When you find a solution, PLEASE let me know. Thanks!

OK, try replacing the headlight globe on the right side, this should help with the voltage. With your indicator, check that all of them work. A fast flashing indicator means either one of the indicator globes in blown so the power goes to the one that works making it flash faster, OR you may need to replace you flasher can relay. this is located under the hood of your car in the black fuse box. Let me know how you go with it pls.

Since you have already tried replacing globe, take a look at the connection that the globe plugs into on the base of the headlight. Have a look and make sure all the wires are in the clips that hold them in. This sounds like a bad connection. If it was a power supply issue, both headlights would be cactus. Check globe holder and wiring harness all the way back to the fuse box. No pinched wires or kinks.