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Old 10-02-2012, 12:00 AM   #28
Beezer
Beastly Adventurer
 
Joined: Oct 2004
Location: Anchorage, formerly Spenard (hub of the universe)
Oddometer: 5,371
been a while since I fooled with a balast resistor, but ya, nicrome wire in ceramic is the way I remember it. so.... 2-3 amps of coil current and a 2 volt drop across the resistor is 4-6 watts. not all that much heat.

yes, I had a couple trucks with a dual post battery... we even had a company up here that made them. we also used to tap a screw into the cell connector between 3rd & 4th cells to run the gauges. pretty much everything else was easy enough to convert. I even had a positive ground GMC truck once
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