Headlamp Rheostat?

[kevinrcase]

On my 55 T-bird I am not getting -6v on at least the heater control box lamp. and bulbs do not light in the instrument cluster. I got -6v on the fuse on the back of the light switch which is suspose to feed these. The shop manual says these are on the Rheostat I assume an intergral part of the head lamp switch but this knob just spins and spins. Am I over looking something cor could there be a Rheostat on this switch and it is just broken.

 

[paul2748]

I don't know how you can get a negative 6 volts??? If the knob just spins and spins, it sounds like the headlight switch is broken. The knob has a positive stop either way.

If dimming the instrument lights is not important to you, there is a modification that can be made to provide full voltage to the lights. See Page 303 of the TBird Restoration Details and Specifications manual.

 

[kevinrcase]

Thanks Paul. I got the Ford 55 shop manual but not that book. Oh negative 6 volt is with the multimeter black grounded as I alway do and red on the wires. -6 since it is a positive grounded system.
Kevin