Using 6 volt gauges on 12 volt system.

[Sniper]

Every now and then, someone asks if there is a way to step down the voltage so the original 6 volt gauges can be used. Generally it's just the fuel gauge that needs it, but sometimes the temp is electric also. Resistor wire wrapped around a porcelain body is one style of resistor that will work. But....they develop a lot of heat, enough that it can cause a lot of other problems. I came across an adjustable resistor that can do the job for less than $2 and can handle up to 3 amp. www.icstation.com has them and a lot more of the small nic-nacs that can be used in the automotive world. Check them out, they might have what your looking for.

 

[Sniper]

Here's a little added info and a picture.

Board is just under 2 inches long, just under 1 inch wide and 1/2 inch tall, not real big.
Item # 1383

Can handle from 4 - 35 volt DC in

and can deliver 1.23 - 30 volt DC out, set it for what ever you need.

There is a smaller one, but has a limit of 2 amp and is less than an inch square.

 

[earthman]

Excellent! Thanks for sharing this Sniper.