Turn Signal Problem

There are a few possible reasons why your turn signal light is not working while your brake and tail lights are functioning properly:

1. Blown fuse: The turn signal lights are connected to a different fuse than the brake and tail lights. The fuse for the turn signals may have blown and needs to be replaced.
2. Turn signal switch: The turn signal switch, located on the steering column, could be malfunctioning and needs to be replaced.
3. Wiring issue: A wiring issue, such as a broken wire or loose connection, could be preventing power from reaching the turn signal lights.
4. Flasher relay: The flasher relay is responsible for controlling the turn signal lights. A faulty flasher relay could be preventing the turn signals from working.
5. Signal/light module: Some cars have a signal/light module that controls the turn signals, this could be faulty and need to be replaced.

Well, the headlight switch would have no connection to the brake and turn signals. But you could have a ground problem somewhere.
I would want to trace the circuit from the brake switch to the tail lamps with the headlights on to verify.
And does it matter if you are using headlights or just parking lights.

Change the bulb.The bulb has two lights.Running,and brake light turn signal.Its the bulb

hello same pronlem with my 98 durango but right turn signal!

what it was is the 4 pin connector for the tow package had the insulationripped off them i guess whe backing out of a steep driveway it sxrapped! so the headlights, turn signals, and brake circuits where grounding out! quick fix!

just cut and capped that mess!

good luck

lol sounds like my old truck most likely crossed wires

The turn signal and brake lights are controlled by the turn signal switch.
You did not mention parking lights so I will assume they work.

Could be a faulty turn signal switch or a wiring problem between the dash and the rear of the van.
Do the hazard flashers work on all four corners ?

The bulb for the turn signal/brake light is a double filament bulb. It will come on with the lights on, but should light the second filament, making it brighter, with the brakes applied or turn signal on. It could just be a bad bulb, but one common problem on these years of truck is the rear light circuit board and requires the whole assembly to be replaced. Start by checking the bulb first though.
Hope this helps. Good luck!

try http://www.etrailer.com/faq-wiring.aspx. This should help.

bad ground from the rear tail light

First thing i would do is chg. the break light switch, and make sure to chk. all grounds around tailights, sometimes if there is a ground problem it will travel back thru the hot wire to get a ground, witch in turn makes everything go wackey.