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Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
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| | | | Joined: Nov 2009 Posts: 84 'Bolter | | 'Bolter Joined: Nov 2009 Posts: 84 | I rewired my truck to 12v but the heater motor is still 6v. Classic Parts said that this Voltage Reducer would work. It works fine but it is SO hot (I mean real hot) that it burned me when I touched it. I know, I know, don't touch it, but I want to make sure this is expected when stepping down the voltage. Anyone have any other experience? | | | | | Joined: May 2005 Posts: 1,624 Shop Shark | | Shop Shark Joined: May 2005 Posts: 1,624 | The heat is normal and expected. You have chosen to use a resistive type devce (resistor) to "scrub" of the extra voltage. It does this by converting the voltage into heat, P=IxE or watts(heat)= current x voltage. The other way is to use semiconductors or transistors with a simple circuit. The transistors have to be somewhat large (expensive) to handle the the current but the heat is not there.
Six volt guy living in a twelve volt world
| | | | | Joined: Mar 2007 Posts: 4,215 Moderator | | Moderator Joined: Mar 2007 Posts: 4,215 | I purchased that very same reducer but thought better of it and got a 12 volt motor. I don't like that kind of heat up in there with all those wires. | | |
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