Question about 1989 Jeep Cherokee

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1989 jeep cherokee pioneer. Right hand side turn signals not operating bulbs front an rear stay on and do not flash.flashers work. All bulbs good. When the parking lights are turned on the right front turn signal bulb goes out and the right turn signal arrow on the instrument panel dims.

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  • Jeep Master
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The turn signal switch is bad,replace it to repair the problem.

Posted on Jul 05, 2010

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3 Answers

Turn signals not working


all else on car works perfectly (other shoe drops??????)
waring 1: no scan tool, you will fail (99%)
is battery fully charged to 12.6vdc rested or at 10v?
all 4 corners dead?
not working means dead?, flashes too fast/slow or dim? or they stick on? (5 modes to fail not counting L/R and haz)
do the hazards work? (prime evidence and not stated)
most cars before 2007 have fuse marked TURN.
but not this car... its not at all like older cars....
did you scan it first after the fuse tests? any PCM scan tool.?
2009 WK jeep
the FSM chapter 8L shows the huge list of errors the lamps can fail. DTC errors.
in fact 8 blinker codes, ! DTC errors,

there is no fuse, just for turns, (trailer lamps fuse 19)

read this excerpt from the FSM book.

The turn signal system operates on battery current received on a fused ignition switch output (run) circuit so that the
turn signals will only operate with the ignition switch in the On position. The hazard warning system operates on
non-switched battery current received on a fused B(+) circuit so that the hazard warning remains operational regardless
of the ignition switch position. When the turn signal system is activated, the circuitry of the left multi-function
switch and the FCM will cause the selected (right or left) turn signal indicator, front park/turn signal lamp, front side
marker lamp and rear tail/stop/turn signal lamp to flash on and off. When the hazard warning system is activated,
the circuitry of the hazard warning switch and the FCM will cause both the right side and the left side turn signal
indicators, front park/turn signal lamps, front side marker lamps and rear tail/stop/turn signal lamps to flash on and
off. The Front Control Module (FCM) can also activate the hazard warning system lamps.
end quote)

the module front control MFC, runs this
and it uses fuse 18 , if 18 blows the module goes off line and vast things fail and huge numbers OF DTCs store.
and fuse 27 MFC
MFC needs these fuses good.
keep in mind nobody has MFC internal schematics...so........



this module drives left and right side front and rear.
electronic drivers, not fuses.
the MFC is here.
the fuses are 12,13,18, 20,27 that power MFC.


25812039-lb3yimx2pwhstnjl4tgwffiq-2-0.jpg ground this end.

Aug 07, 2015 | 2009 Jeep Grand Cherokee

1 Answer

Jeep tj problems


That is a sign of a bad bulb, flashing fast. Check that rear bulb.

Dec 31, 2013 | Cars & Trucks

1 Answer

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.

May 28, 2017 | 1988 Jeep Cherokee

2 Answers

Right signal flashes quickly


Check for a blown bulb either front or back on that side.

Jan 26, 2012 | 2003 Jeep Grand Cherokee

1 Answer

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!

Jul 25, 2010 | 1990 Jeep Comanche

1 Answer

My right hand turn signal dose not flash


that is a classic symptom of a bad flasher.

Jul 20, 2010 | 1989 Pontiac Bonneville

2 Answers

1993 Dodge Shadow...left turn signal won't flash


If the fuses are good and the front and rear bulbs are good, change the flasher for the turn signals, even tho the right is working. If that doesn't fix the problem, it might be in the turn sgnal switch on the steering column.
If both bulbs are good for the backup lights and fuses are good, then the backup light switch, which is screwed into the side of the transmission has to bad.

Apr 12, 2009 | 1993 Dodge Shadow

2 Answers

Indicator stays on


i am going to take it you are talking about the turn signal...look for a burned out bulb...that will cause this condition

Oct 30, 2008 | 2000 Jeep Grand Cherokee

3 Answers

Blinkers not working


Did you check the bulbs? If one bulb is burned out, the blinkers won't word on that side. You could have one bulb burned out on each side. Start the car, put left signal on. Check front and back lights. Is one light on but not blinking? If that's the case, the light that's not on at all is burned out and has broken the circuit so the good light stays on and won't blink. Check the other side. You also have a 'flasher' , actually 2. One for emergency flashers, one for the turn signals. It could be that the turn signal flasher is shot. You just have to unplug it to remove. It's probably located near the fuses. good luck countrycurt0

Aug 10, 2008 | 1999 Jeep Grand Cherokee

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