auxillary heating fan wiring question, and the cockpit switch for the heater Options

[brant]

Hey gang...

is my memory on this correct?
does the heather lever/fan switch only have one electrical wire to it?

is that a ground wire or a current flowing wire?
(it must be hot since its identified in the current diagrams)

I'm trying to trouble shoot why my auxillary heater doesn't work and want to understand how that switch works.

when the switch is open/on.. does it send power to the engine compartment and regulator board? how does the switch work if it is only a single wire?

or does it then send a ground signal to the back instead?

thanks for everyone's time
brant

[brant]

Ok...
then I definitely have a problem

when I put a test light on the single wire I get a faint glow, so there must be a feedback/short sending power down the wire.

when I connect a test light to the regulator panel on the forward pin (14pin) connector for the same wire (but with the connector off and just the panel pin). I also get a faint glow.

that must mean that my short is in the regulator board

but here is the weird thing. Either of the above 2 test light checks cause the fan to start running. So the faint ground I'm making must be enough to trip the relay?

someone please confirm if you would... I'm assuming that the faint glow/short I see with my test light is WRONG?

brant