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Ask sprinkles08 Your Own Question
sprinkles08, ASE Certified Technician
Category: Jeep
Satisfied Customers: 22654
Experience:  Chrysler/Dodge/Jeep Master Certified, ASE Master and Advanced Certified, Trans and Hybrid Specialist
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03 Grand Cherokee 4.0 Turn sigs did not work, did. I

Customer Question

03 Grand Cherokee 4.0 Turn sigs did not work, flasher did. I replaced the flasher but turn sigs still don't work
JA: What are all the symptoms you've noticed (e.g. noises, leaks, flashing lights, error codes)?
Customer: No noise leaks or error codes. Just turn sigs don't work but emergency flasher does
JA: How old are the hoses? And what driving conditions do you most often encounter?
Customer: New hoses. Street, freeway, outback (least often)
JA: Are you fixing your Outback yourself? What have you tried so far?
Customer: what outback? I'm talking about my Jeep
JA: Anything else you want the mechanic to know before I connect you?
Customer: No that's enough. I just want to know what he might think is happening
Submitted: 11 months ago.
Category: Jeep
Expert:  AZTechBrian replied 11 months ago.

Hello. This is not uncommon on this vehicle. Under the dash there is a turn signal relay that is in need of replacement. You could also attempt to repair if you have a soldering iron and the ambition to do so.

Expert:  AZTechBrian replied 11 months ago.

I will find you a diagram showing the location of that relay if you'd like.

Customer: replied 11 months ago.
I've already replaced it with a new one just now. No change
Customer: replied 11 months ago.
Flashers work turn sigs do not.
Expert:  AZTechBrian replied 11 months ago.

Yes. That's exactly what happens when this relay goes bad. the hazards will work but turn signals will not. You replaced the relay in the front junction block?

Customer: replied 11 months ago.
that's what I'm trying to tell you -- relay was replaced, same symptons as previously indicated still occurring
Expert:  AZTechBrian replied 11 months ago.

Ok. ;I have seen this numerous times and it has always been that relay. Since it's not the case for you, I will open this up in hopes that someone else here knows of another issue that would cause this. Sorry about that. Someone should be along shortly.

Expert:  sprinkles08 replied 11 months ago.

Hello and welcome to JustAnswer!

Do you still need help?

Customer: replied 11 months ago.
Yeah problem still exists
Expert:  sprinkles08 replied 11 months ago.

Are you able to do electrical testing?

Customer: replied 11 months ago.
No did no further diagnostics.
Expert:  sprinkles08 replied 11 months ago.

You've checked fuses?

Customer: replied 11 months ago.
I looked at the fuse box (there are two one under the dash and one under the hood) but the owner's manual wasn't real clear which fuse governs the turn signals. Can you tell me?
Customer: replied 11 months ago.
I have an assortment of fuses so changing one immediately would be no issue. I just need to know which one ...or could it be one of many?
Expert:  sprinkles08 replied 11 months ago.

Fuse 20 in the junction block is the one in question.

Customer: replied 11 months ago.
Will check and advise.and replace if blown
Customer: replied 11 months ago.
Replaced fuse. Right blinker works left does not
Customer: replied 11 months ago.
How's that??
Customer: replied 11 months ago.
Fuse blew after about 15 mins of driving. No sigs at all now. Any other suggestions?
Expert:  sprinkles08 replied 11 months ago.

The fuse blew because there is a short to ground somewhere in the circuit. It could be anywhere between the flasher and each light. If the left side didn't work then there is a good chance the short is in the left side wiring. The first thing that will need to be done is a visual inspection of all the wiring, paying particular attention to trailer tow wiring if you have it.

Customer: replied 11 months ago.
OK we'll have my mechanic check it out. Thank you
Expert:  sprinkles08 replied 11 months ago.

You're welcome and good luck with it!

Customer: replied 11 months ago.
Your online troubleshooting was very helpful thanks again
Expert:  sprinkles08 replied 11 months ago.

You're welcome!