The blinker on my 1995 dodge 3500 van doesnt work?

Question

the main lights work on that bulb however the turn signal and brake light doesnt work. they all use the same bulb. the front turn signal works just not the back. like i said that bulb works when the lights are turned on however the blinker and stop light never works.

Answer 1

If the bulb is out, the other light will come on and not flash.  If that is the case, replace the bulb.

Answer 2

Those bulbs have two filments. Check to make sure both are still good. You'll have to remove the bulb and look at it.