For Use With Gauges Up To 15 Amps For Heater & Wiper Motors As Well If you are keeping the original 6 volt gauges, use one or more of these reducers. This electronic unit will not burn up your gauges as is possible with improper resistors. This unit is for retaining 6 volt gauges when you convert your vehicle to 12 volts. NOTE: For Use Up To 1.5 Or 25 Amps Continuous See Alternate Items