Question about 1998 Mercury Grand Marquis
Turn signals won't work
FIRST THING ARE THE LIGHT ON YOUR CAR OK.BULBS THAT ARE BURNED WILL AFTECT THE AMP DRAW AND WILL AFFECT THE OPERATION . TRY YOUR EMERGENCY LIGHTS AND SEE ALL THE BULBS ARE ON KEEP AN EYE ON THE DIM ONE ALL SO. IF YOU EMERGENCY LIGHT WORK AND NO TURN SINGAL LIGHT 90% IT WILL NEED THE FLASHER. ALL THE CARS WILL HAVE 2 OF THEN 1 FOR TURN SINGAL AND THE OTHER FOR THE EMERGENCY LIGHT.. GOOD LUCK MAKE SURE YOU USE THE CORRECT BULB
Posted on Jan 19, 2013
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Posted on Jan 02, 2017
This is a Problem with the Switch Housing inside the Steering Column. You will need to Pull the Steering wheel and a Few other Components to get to this. Usually better left to Pro to Repair as it is Pretty Labor Intensive.
Posted on Jan 24, 2009
Check all earth wires on all lights.
most lights in cars run in series so if u loose one you loose the other mainly caused by bad earth on globe holders or corrosion where bulb sits.
little sand paper goes a long way.
Posted on Mar 07, 2009
You didn't mention your rear brake lights. If they don't work either then you probably have a bad light control module (LCM). This is a common problem with big Fords. You can buy a replacement part ($250) or have yours rebuilt (www.autoecu.com). The module is located under the dash to the right of the steering column and is fairly easy to replace.
Do the turn signals work? If not it may be the turn signal switch. The aftermarket parts are cheaper than a Ford factory part; check the guarantee before deciding.
Worse case scenario? You need both parts.
Posted on May 01, 2009
If you still have flasher problems, I read on Google to spray WD-40 down in and around the hazzard flasher button, then press it up and down several times...and BINGO...all flashers and signals worked again....just had some dirt and dust in the wiring....
Posted on Jun 07, 2009
Sounds like the multi-function switch (I assume wipers, and dimmer still works).
Its about a $100 part from Ford, most jobbers won't carry this part, but you might get lucky if you call ahead.
The trickiest part of the fix is removing the key tumbler from the right side of the steering column. The rest of the job is quite straight forward. Shouldn't take more than an hour.
Posted on Sep 28, 2009
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