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Note the diagram. Left rear turn, the light green wire with orange tracer is voltage. The black wire ground. You need both voltage and ground. Use a test light to check. The voltage for turn signal comes from multifunction switch. As far as the ground, you could try a redundant ground? good luck
Yes, it does have a flasher, although it may be a combined unit with the hazard flashers relay. So you hear the clicking of the flasher relay? That seems to indicate the relay is working properly. Have you checked the bulbs and the turn signal fuse? Any turn signal bulbs light up anywhere, front or back?
How about your brake lights, do they work? Your car may have separate, stand alone turn signals in the rear, but many American cars use the same bulb and same filament on the bulb for the brake lights and turn signals. If your merc is like this and the brake lights work, then the bulb must be good. Turn on the hazard flashers and see if all bulbs work and flash at each corner of the car. This would be the same bulb as for the turn signals. If they work, it could be a bad turn signal switch, may even be the flasher relay somehow malfunctioning, and in a few cases, a bad hazard switch can affect the turn signal switch. Check fuses and bulbs first. If you have any type of body control module that controls lights and other accessories, you may have to investigate that. I know I'm not being very helpful, just throwing out a few suggestions. Good luck.
I had this problem, and to be honest, it happened to the left side about a week later...it's the board that the bulbs plug into...it's a very common problem with this model. So popular that you can normally get the socket board off the shelf at a parts store! it's extremely simple to replace, and I replaced all the bulbs at the same time!
CHECK BLOWER MOTOR FUSE AND RELAY.IF ALL IS GOOD.CHECK TO SEE IF BLOWER IS GETTING POWER.IF NOT.SWITCH IS BAD.IF YES REPLACE BLOWER MOTOR.IF TURN SIGNALS STOP WORKING.CHECK FUSE FIRST.IF FUSE LOOK GOOD. CHECK BULBS TO SEE IF THEY ARE BLOWN.IF BULBS LOOK GOOD PROBLEM COULD BE WORN OR CORRODED BULB SOCKETS OR.BAD GROUND.OR THE TURN SIGNAL SWITCH IS BAD.
Sometimes even a new bulb will not work. If you have a Digital Multi Meter you can check that you have power going to the rear. I know that sometimes when a vehicle loses a bulb in one end that it can make the other end stop working. With that said, I suggest that you double check to see that the front works. I used to own a 98 Cavalier RS with the 2.2 liter motor and I know that there are fuses under the hood and behind a little door on the drivers side in the car. Might check fuses under the hood also.
Somtimes the bulbs get a dead short in them even though they look OK. Install new bulbs or remove all bulbs on this circuit and reinstall one at a time to see if fuse pops. I had this problem with signal lights on 95 chevy 1500 and turned out the back up bulbs were on the same circuit. Bad back up bulb so once truck was in reverse it blew the fuse and then the signals did not work. Cheap enough to be worth a shot.
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