Re: No Headlights

Posted by HH56 On 2022/1/17 16:53:39

Headlight switch is fed from the output side of the ammeter. There is a terminal on the switch where the wire from the ammeter connects to supply the headlight switch, aux fuses for options and courtesy lights etc, and is also used a a tie point for a wire continuing on to feed the ignition switch.

Assuming the wiring is all stock and the knob did not get disconnected from the actual switch, if ONLY the headlights are not working it would most likely be the headlight switch or the dimmer switch. If the tail, parking or instrument lights are also not working it could be a connection or the switch itself or the circuit breaker (as Packard called it, the thermostatic switch) built into the headlight switch that has failed.

Here is an illustration of the headlight switch showing the connections along with an AEA 110 wiring diagram coutesy of the PAC site. The AEA diagram is a bit easer to follow but there is a factory drawing you can download from the literature section on this site if you want that style. Note that the wire labeled for the panel light switch has an inline fuse after the headlight switch and before it gets to the panel switch. That fuse protects the instrument lights as well as the tail lights which also use the panel switch input terminal as the place they get their feed.

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