When you pull the switch to you that is flash to pass . Did you check fuse's ? There is a headlamp relay that could be bad or the dimmer switch could be bad . You can find a wiring diagram at http://bbbind.com/free_tsb.html Use wiring diagram to test for B+ voltage at headlamp switch , dimmer switch an also check ground circuit . If you find B+ voltage going into the switch but not out , there is your problem .
SOURCE: 2000 dodge ram headlights not working
Try this, take the steering colum cover off. Check the back of the multi function switch. Likely the ground wire is broke at the connector. I believe the ground wire is the second wire rom the top on the second row of wires. Unfortunately, the connector plugs inside the plastic houseing break and pull out. The fix isnt easy. You can either replace the entire wireing harness, or splice in some extra wire to take the strain off the plug. Good Luck
SOURCE: Turn Sigal wont work and headlights dim
You will need to use a test light to verify voltage at the turn signal flasher.
Turn the key on to the run position, car does not need to be started.
Set the turn signal switch to right or left turn, doesn't matter.
Probe the "purple" wire terminal at the flasher unit. If the turn signal switch is working properly, you will have voltage at the flasher unit.
If you do not have voltage, the switch may be the problem, make certain all connectors to the steering column are fully seated and there are no broken wires.
Good luck and let me know.
Regards,
SOURCE: headlights dont work unless holding dimmer switch for bright lights
I would think the problem lies with the dimmer switch on the steering column, since this is a very expensive part please have a local dealer confirm my guess.
SOURCE: headlights wont work on dim, only bright
Check your head light bulbs, your truck has the dual filiment headlight bulbs one per side which does both high beam and low beam, 9007 bulbs.
If the low beam filiments are burned out only the high beam will work.
Also look into finding out if the headlight switch is gone bad.
The headlight module and or drl module maybe defective.
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