Just checked my wiring diagrams to confirm my recollection at seeing sparks.
All the switches in my Ď72 are wired in on the hot side. My diagram shows the fan and lights at the roof vents and range hood feed off the fuse panel by the converter.
Theoretically if youíve got lights you should have power at the switch. Practically after 30 plus years any number of connections could be bad. Donít forget that even if you have 12 volts static on a switch, you could have a voltage drop or bad ground anywhere in the circuit once the load is applied.
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