95 Dodge 3500
headlights not working. when I pull back on the dimmer switch, the hi beams work, when I let go I have no headlights. parking and turn lights work. have replaced the dimmer switch and headlight switch and checked fuses and relays unless one is hidden. out of ideas. any suggestions?

 

Could be the multifunction switch. I had a similar problem and sprayed some contact cleaner from radio shack into the switch. Haven't had any problems since.

 

Check the bulbs, if you haven't. I have actually seen more than one occasion where both low beams have burnt out within a day of each other.

Also, have a look at the wiring leading to the multifunction (dimmer) switch. It can fatigue over the years and break where the steering column tilts.

 

See if have power to low beams with test light. No power equals bad wiring from dimmer switch to bulbs. Power equals bad bulbs.

 

I just had the same problem. It started with no pass high beam then not pass low or high beam. Then about two days later I lost my drivers high beam. I took it to the dealer and they reset the computer. The told me I need a new Module for the fuses. They said that the computer was seeing a higher than normal load and it shut the lights down. He told me if I needed to reset it my self just disconect the hot wire coming from the battery to the fuse panel. keep it off for approx 20mins then put it back together. The cost for the module is just under a grand installed. (Im not so sure that this is the cause though)