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Posted on Oct 12, 2012
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My turn signals on my 1988 Jeep Comanche dont work.

I replaced the flasher, and the turn signal switch. The bulbs are also good. The hazards work perfect. When i pull the nob to turn on the lights the turn signal indicators in the guage cluster stay lit up, and when i flip the signal switch to a certain direction that directional indicator light will just shut off. Also when its flipped in a direction, that corresponding light will stay lit up on the front of the truck, and the rear light wont do anything.

1 Answer

Stephen

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  • Jeep Master 21,873 Answers
  • Posted on Oct 12, 2012
 Stephen
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Joined: Jun 22, 2012
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My first guess would have been the turn signal switch, which you said you replaced.
You'll have to get a wiring diagram of the switch and start testing wires for power out of the switch. Could be a problem with the main harness going back to the rear of the truck, or a ground for those sockets.

5 Related Answers

Anonymous

  • 6982 Answers
  • Posted on Nov 19, 2009

SOURCE: 87 Jeep Comanche, turn signal issues

You will find that there are two flasher units on the fuse panel. Turn on the four ways to identify which flasher serves that circuit. Then, move the flasher to the other position (where the signal flasher is) Your directionals should then work. You then can buy another flasher and install it when you have a chance, putting it in the 4 way position. The 4 ways get used so infrequently, you always have a reliable spare signal flasher there!

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Anonymous

  • 1 Answer
  • Posted on Sep 06, 2008

SOURCE: 1998 wrangler turn signal/brake light short

your socket may not be grounded properly, I have seen this before, and the simplest way to fix is change the socket with a new one.Not another used one it may also be bad.

Anonymous

  • 141 Answers
  • Posted on Feb 17, 2009

SOURCE: left rear turn signal and brake light dont work

You have a broken wire to the turn/brake light portion of the light as they use the same wire. Or where the plug goes into the light assy could be bad. Torsion mount lights are horrible and you should think about replacing with a universal light that you can wire direct.

Anonymous

  • 15 Answers
  • Posted on Oct 04, 2009

SOURCE: my jeep wrangler hazard lights, turn signals and

replace the flashers, check fuse, check that the switch is grounded properly

Anonymous

  • 1 Answer
  • Posted on Apr 01, 2010

SOURCE: turn signals hazards flasher don't work jeep

I NEED TO LOCATE THE SWITCH WHERE IS IT ?
MY INDICATORS NOR HAZARD LIGHTS ARE WORKING I DONT KNOW WHAT IS WRONG WITH IT CHANGED BULBS BUT NOTHIGN THEY ALL WENT OUT AT THE SAME TIME
SO THERE MUST BE A RELAY SWITCH SOMEWHER BUT DONT KNOW WHERE ?
THANKS FOR HELPING

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TROUBLESHOOT TURN SIGNAL

try the hazard lights. if they work check the bulbs with them working. if good and the turn signals not working then it could be the signal flasher is bad. witch out the hazard flasher for the signal flasher it they work then replace flasher, or the turn signal switch it bad.
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88 Jeep Cherokee, left turn signals don't work. Right signals flash as they should. Emergency flashers work as well. When the left turn signal is activated, the dash arrow lights up, the front bulb lights...

Quite a puzzle you have that seems impossible, though such things weren't unusual in the old days of bimetal flasher units. The modern electronic flasher relay is designed to flash at a speed dependent on the amount of current drawn by the circuit so if a bulb goes out the speed doubles or thereabouts, giving the driver an indication something is wrong.
Broadly speaking the flasher unit will operate as it is designed within a current range so if there is too much current flowing or not enough it probably won't work at all.

The turn signal switch is usually a very reliable thing and as the left hand lamps light it is fair to assume it is working ok. If the switch is accessible it would be simple to measure the current being consumed by the circuit, which would be nearly 4 amps with the engine running at a fast idle. If it isn't then I suggest you revisit the lamp grounds and other connections.

My instinct is to suspect the hazard warning switch. It is often an unnecessarily complex switch and wiring arrangement and often responsible for turn signal malfunctions. Mostly operating the switch rapidly for a few minutes puts matters right, though if it doesn't I suggest you check the multiway connector behind the switch.
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Why dont headlights come on an ford f 250

Hazard and turn signals usually use separate flashers, switch the flashers to see if turn signals work and hazards don't, if so replace the flasher

you need to replace the blinker flasher unit

it is different from the hazard unit

they cost about 4 bucks

the flasher unit is the big round thing in the fuse panel in the dashboard


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Have a 1988 Jeep Wagoneer with a few issues. My turn signals no longer blink or flash that I know of..?

Okay, the first thing to check is to turn on the signal on one side and see if the outside signal light comes on. if the light comes on then try replacing the flasher. Also see if your 4way flashers work or if they are also out. if they are out then check your fuse first.
If the fuses are good then try the flasher, if the flasher does not solve the problem then you may need to replace the turn signal switch. I have worked on a few of these and most of the time it was a flasher or the turn signal switch. good day.
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Signal lights don't flash

Change the signal light flasher. I'm not sure exactly where it is but it is more than likely under the dash near the steering coluum or close to or in the fuse box. Good luck!
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Turn signals do not work

This is one FLASHER fault; ?m referring to the blinker "flasher fuse", it is the bottom round fuse under the dash in the fuse block.

REPLACEMENTThe turn signal flasher and hazard units are usually located located under the dash either to the left or right of the steering column on most models.
  1. Remove the turn signal flasher unit or hazard unit by pulling them up from the electrical connection.
  2. To install, push the unit(s) into the electrical connector

Good luck (remember comment and rated this).
1helpful
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87 Jeep Comanche, turn signal issues

You will find that there are two flasher units on the fuse panel. Turn on the four ways to identify which flasher serves that circuit. Then, move the flasher to the other position (where the signal flasher is) Your directionals should then work. You then can buy another flasher and install it when you have a chance, putting it in the 4 way position. The 4 ways get used so infrequently, you always have a reliable spare signal flasher there!
4helpful
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Turn signals hazards flasher don't work jeep cherokee replaced combination flasher relay, turn signal switch and still no signals

I NEED TO LOCATE THE SWITCH WHERE IS IT ?
MY INDICATORS NOR HAZARD LIGHTS ARE WORKING I DONT KNOW WHAT IS WRONG WITH IT CHANGED BULBS BUT NOTHIGN THEY ALL WENT OUT AT THE SAME TIME
SO THERE MUST BE A RELAY SWITCH SOMEWHER BUT DONT KNOW WHERE ?
THANKS FOR HELPING
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Signal lights dont work when breaking

No,this is not normal,this normal when the emergency flashers are on,but not the turn signals.Check the bulbs(all of them)in the rear tail light assembleys.If you can not tell which bulbs are bad,replace them all.Does this vehicle have a trailer light plug?If it does,it could be in it.After the bulb replacement(look at bulbs in your hand to see if filiments are burned)replace the turn signal flasher.To find it turn key on,and left or right turn signal on,and listen,and feel for it under dash around the steering column.
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YJ Blinker Relay

Hi there,

Both the hazard and the blinker flashers are located on the fuse panel. They pull straight out.

When both turn signals fail, the cause may be a blown fuse, a faulty flasher, a broken turn signal switch or a bad connection.

When you try the turn signals, do they light up and not blink?
-If so, probably the flasher unit.

When you try the turn signals, does nothing happen?
-Check the fuse

Let me know if the problem continues after replacing the flasher.

Mike

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