Fuse blow's , short to ground in that circuit somewhere . Viewing wiring diagrams ,so you know which wire's to test using a DVOM - digital volt ohm meter . Or a special short finder tool is how you find the problem . Free wiring diagrams here http://www.bbbind.com/free-tsb Enter vehicle info. year , make , model an engine . Under system click on lighting ,then under subsystem click on turn signal lamp . Click the search button then the blue links.
How to find automotive electrical shorts
Principles of Operation
The lighting control module (LCM) controls the flashing of the turn signal and hazard lamps. Power is routed through the multifunction switch to the LCM. When the multifunction switch is placed in the LH turn, RH turn or hazard lamps ON position, the LCM will command those lamps on and off.
have it checked for DTC'S diagnostic trouble codes
B1873
Turn Signal/Hazard Power Feed Short to Ground
LCM
Go To Pinpoint Test O .
SOURCE: Turn signal flasher keeps blowing
This is more than likely caused by a Bad Turn Signal Switch Housing inside the Sterring column. The one that the Handle is attached to and Wraps around the Sterring Shaft on the Inside of the Column.
SOURCE: 1991 lincoln town carTail lights and turn signals stopped working
One of the tail light bulbs can be shorted internally. Replace the tail light bulbs first. Try this cheap fix first.
SOURCE: 98 lincoln town car flashers,turn signals,brake lights don't work
check the outputs on the multi function switch (t/s switch) the brake lights and flashers all go threw this switch try to wiggle the flasher button if the lights start to work then the switch is bad to replace switch remove bottom cover by pedals if it has one bottom cover on steering colum has i beleave 4 screws that hold it on, the tilt colum lever unthreads and the cover will come off the upper colum just clips on you will have to remove the key tumbler to get it off . you need to disconnect the battery at this point and block the wheels. to get tumbler out put key in and turn to run postion there is a small silver button that pushes in with small screwdriver once its pushed in use the key to pull tumbler out the top cover will now come off you will probably have to tilt colum down and shift to 1 to get cover off there are 2 torx head screws that hold switch on plug new switch in and reconnect battery to test lights unhook battery again and reassemble please let me know how you make out
SOURCE: how do I fix the turn signal on my 93 town car
The flasher is located in the fuse box under the dash on the left side of steering wheel and the flasher is in there. If that is what is wrong with them.
SOURCE: Turn signals and emergency flashers do not work
the flasher under the dash for your turn signals
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