65 Valiant high beam indicator not working

[Litz]

I bought this car in Sept. It had been sitting since 1988. I'm having trouble finding why the high beam indicator isn't working. I have replaced the dimmer switch, (Which was bad) and a couple of bulbs in the instrument panel and all the instrument lights, head, and tail lights and turn signals work fine but I can't seem to find the problem with the high beam indicator light. I replaced the bulb, swapped other bulbs into the high beam socket but nothing. Any ideas?

 

[65 Dartman]

My 65 Dodge wiring diagram shows a double red wire coming from the bulkhead connector to the dimmer switch and to the high beam pin on the instrument cluster. If the high beams are working through the floor switch, then the issue is either the wire to the instrument cluster connector, a bad pin at the connector, a bad trace on the circuit board to the bulb or possibly a bad ground (least likely if the cluster lights are working) Hope this helps

 

[Litz]

My 65 Dodge wiring diagram shows a double red wire coming from the bulkhead connector to the dimmer switch and to the high beam pin on the instrument cluster. If the high beams are working through the floor switch, then the issue is either the wire to the instrument cluster connector, a bad pin at the connector, a bad trace on the circuit board to the bulb or possibly a bad ground (least likely if the cluster lights are working) Hope this helps

Thanks for the info Dartman!

 

[Litz]

Thanks for the info Dartman!

Dartman, I have checked all the wires from the dimmer switch to the circut board and I have power to the high beam trace on the circuit board where the high beam bulb goes. But still won't light the bulb. (I've tried several bulbs, and swapped bulb holders so I'm sure it isn't the bulb) Is it possible that that one circuit isn't grounding?

 

[krazykuda]

Dartman, I have checked all the wires from the dimmer switch to the circut board and I have power to the high beam trace on the circuit board where the high beam bulb goes. But still won't light the bulb. (I've tried several bulbs, and swapped bulb holders so I'm sure it isn't the bulb) Is it possible that that one circuit isn't grounding?

Check the bulb with a continuity tester before installing it in the socket... Then put the bulb in the socket and test each "tang" with the continuity tester to see if the bulb still has continuity... sometimes the metal wires on the bulb that make the connection in the socket get pushed in too far and you have to take a small screw driver and bend them outwards so they make good contact with the tangs in the socket....

 

[65 Dartman]

This ^^^^^

 

[Litz]

Checked bulbs,etc for continuity and all is good. All the other instrument lights work fine. I'm wondering if the circuit board on that light maybe has an open ground circuit? Is that possible?

 

[65 Dartman]

Check the trace from the circuit board pin to where the bulb holder makes contact with the trace for continuity. Check the pin and make sure it's not flopping around just a little loose. If you have continuity from the dimmer switch high to the instrument cluster and the bulb and holder are good, it has to be something in the cluster or circuit board.