The 1947 - Present Chevrolet & GMC Truck Message Board Network - Mystery Electrical Device

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Chevy1966

03-24-2026 01:10 AM

Mystery Electrical Device - Rectifier?

1 Attachment(s)

Restoration work finally underway on my '66 C20, starting with a clean-up under the hood of old, unused wiring. Sitting on the inner fender near the voltage regulator is the device shown in the attached picture - any idea what it is or what it was used for? Thanks for any help.

SkinnyG

03-24-2026 06:08 AM

Re: Mystery Electrical Device - Rectifier?

That is a battery isolator, for running dual batteries or (more likely) a camper or RV trailer of some sort.

Chevy1966

03-24-2026 11:24 AM

Re: Mystery Electrical Device - Rectifier?

Quote:

Originally Posted by SkinnyG (Post 9427495)

That is a battery isolator, for running dual batteries or (more likely) a camper or RV trailer of some sort.

Makes perfect sense. This truck had a dual battery setup. Thanks very much Skinny!

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