The Voltage Regulator is marked 12V

With ALL the Power Out wires hooked up, and switch dangling, there is a slight voltage drop from the Battery itself to the switch terminals (12.5V at the Battery, 12.2V at the terminals). The Gauges work and the Radio works. Turning on the Fan (original option Fan and showing its age) causes the 5A jumper fuse to blow. There's also 12.2V at the + terminal of the Coil.

I haven't attached the bracket and dangled the whole assembly yet. Will do so in 1 hour (11 a.m. Pacific time).

Edit: Same outcome with the bracket attached and dangling: Guages and Radio work, 12.2V at the Coil. Did not try the fan, but it has volts too. No continuity registering between terminals and any ground. With the bracket attached out of the truck, the mounting screws (that mount the bracket to the truck) extend far enough to touch the switch case now, but no matter, there is no grounding/continuity between any terminal and the switch case or the bracket. This is all using the 5A Jumper wire from the battery.

Edit: So with the dangly switch wired with all the Accessories and the 5A Jumper, the Accessories (Guages, Radio, Fan) all show power and operate (although the Fan draws more than 5A and will blow the inline Jumper fuse) and the coil gets 12.2V.

With the dangly switch wired the same, but with the power coming from the Ammeter line in the Truck (so no 5A Jumper connection), I can read 12.3V on the Power In terminal, but when I turn the key on none of the Accessories show signs of life. So everything the same, but switch from the 5A Jumper and no amps, just volts.
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Truck Voltage Regulator.jpg (147.18 KB, 64 downloads)

Last edited by PapaDisco; 01/04/2025 7:12 PM. Reason: Clarity and detail