High beams not working

[15austin]

My headlights will only work on low beam. I just put on a new dimmer switch (on the floor) and 2 new headlights. The low beams work fine but when I switch it to high beams the headlights go out. Anyone know a solution? THANKS

[712edf]

If the switch is good (and new doesn't always guarantee good) and the headlights are good, then I'd say the high-beam wire is disconnected (not making contact) somewhere between the switch & the headlamps. Or somehow you're losing your ground when on High beam.

All this is assuming no one overhauled/rerouted the wiring in the past.

Bucky

[Trailmaster]

Headlights go out could be a short in the wiring blowing the circuit breaker for the headlights.

[rjmeuer]

Can hook dimmer switch straight to a battery and headlight to make sure its working correctly?

[15austin]

Can hook dimmer switch straight to a battery and headlight to make sure its working correctly?

Dimmer switch, headlights are good. I need to check wiring , but Ive just not done it yet.

[digdoug]

start by checking the plug in conection at the headlight switch on the dash.When the lights go out give it a wiggle and see what happens.

[1974Stepside]

15Austin,

Have you resolved this issue, if so what was the problem/fix? I have the same problem, lights work fine then when i click the high beams (floor switch) the lights shut off.

[OleRed66]

check grounds. May need to clean up corrosion

[15austin]

No I have not tried to fix it yet. Ive been busy with non-working gauges, oil pan gaskets, timing chain, valve cover gaskets, aluminum intake. But it is in the garage now so I get on it this week.

[15austin]

Just fixed the problem. It was the high beam wire going into the fuse box under the hood. Just wiggled the wires and they came on.
These high beams has not worked in 9 years so I am pretty excited.