Quote:
Originally Posted by tubman
The early 6 volt cars were negative ground as it reduced corrosion problems. If the car is six volts, I would switch it back to positive ground. On the heater, you may have to switch the wires around to get it to work. The radio? We need more information. 6 volt Chevrolets (and other GM products) were negative ground, so if you have a radio from one of them, you have a problem. Other than that, it's probably a Ford radio, as I know of no one who makes and aftermarket 6 volt radio. I believe (I'm no expert on this) that the only polarity sensitive component in the radion is the vibrator. We clearly need more information about the radio.
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The radio is a 1951(?) Motorola 501A universal fit.