Turn signals not working on my 98 Mustang. Hazards work fine. Already replaced the multifunction switch. Didn't help.

Most likely cause is the hazard warning light switch , this unit is all electronic inside and it sounds like the hazzard light unit has failed , You might find you can solder a connection on the back but i cannot remember what model or make of vehicle i have done this on ,, Just renew the whole unit and it will all work as it should

A electronic control module ,BCM body control module or a SJB - smart junction box ford calls their body control module .
Principles of Operation
The smart junction box (SJB) monitors the multifunction switch position by sending multiple voltage reference signals to the multifunction switch. When the multifunction switch is in the LH or RH TURN positions, or the hazard lamp switch is engaged, that input signal is routed to ground.
When the SJB receives a request for a turn signal or hazard lamps, the SJB supplies voltage to the appropriate turn lamps.

• The hazard lamps are inoperative/always on

• Circuitry
• Hazard lamp switch
• SJB

• Go To Pinpoint Test O

Pinpoint Test O: The Hazard Lamps Are Inoperative/Always On
Refer to Wiring Diagrams Cell 90 , Turn Signal/Stop/Hazard Lamps for schematic and connector information.
Normal Operation The smart junction box (SJB) sends a voltage reference signal to the hazard lamp switch through circuit CLS32 (BN/YE). When the hazard switch is engaged, the voltage signal is routed to ground through circuit GD116 (BK/VT). When the SJB detects a request for the hazard lamps, the SJB sends voltage to the appropriate turn lamps.
DTC B1875 - is an on-demand code that sets when the SJB detects a short to ground from the hazard lamp switch input circuit.

Possible Causes
• Circuit CLS32 (BN/YE) open or short to ground
• Circuit GD116 (BK/VT) open
• Hazard lamp switch
• SJB

So. with right turn signal everything works ok? There is the multifunction switch and the turn/hazard flasher module, I don't know what you replaced?

One flasher only. Check fuses first. Then suspect the flasher as a possibility. I have seen the hazard switch cause the turn signals to malfunction. Try pressing the hazard button in. If they work and flash as hazards you know the bulbs and flasher are ok. If the turn signals then work you have a defective multifunction switch (the hazard/turn signal/etc switch)

Make sure all the signal bulbs are good. Possible defective flasher under the dash

When you had the wiring loose for multifunction switch, if possible, knowing what color wire did what, using wiring diagram, I believe you could have used jumper wire to bypass multifunction switch to see if this or that system would work, if it doesn't, the multifunction switch probably wasn't the problem. On older vehicles it was probably easier to do something like that. Could be issue with wiring in steering column or clock spring, where applicable.Your low beam from dimmer switch goes through drl relay, with relay not energized. At the low beam head lamp, tan wire is voltage, black wire is ground.

Fast clicking is caused by a higher than normal current being applied. Normally a short or a aftermarket relay that requires less current to switch. Sounds like the entire multifunction switch is bad.

There is a good possibility that the hazard warning and directional signal lights have nothing to do with the starting or operation of the engine. There are many things that might cause the car to fail to start. The battery must be fully charged, and in good working condition. No corrosion on the terminals. good solid connections. When you turn the key the starter motor should turn the engine over. If that works the carburetor will need gas. If you have gas and spark, the engine should run. Hope that helps.
Turn signals work with the tail lights and parking lights on the front. You should turn on the Head lights and check to see if the tail lights and parking lights come on. You will also want to check to see if the flasher is plugged in. All the light bulbs must be plugged in and working to operate the flasher for the turn signals. good luck

I need one new hazard switch for my hyunday sonata 1998 4cilinder

this car has a brake light switch on the pedal check for power in and out. if in and not out change switch. also I believe their is a relay under the hood . then check to see if the multifunction and hazard switch control brake lights i cant remember if they do like gm's but i am also almost sure they do the multifunction is your turn signal wiper arm that goes into steering wheel . after you check the brake switch and relay have some one jiggle the hazard and multi while pressing the brakes see if they come on. you can call ford and ask them about the multi and hazard .