Wiring a motorcycle seat for heating

[AHobbyist]

Heating element is 5.6 Ohms and too hot to wire directly to the battery. How do I reduce power to 30% and 60% for a high and low setting?

 

[Diver300]

One way is to have some sort of timer relay to turn it on for 1 second and off for 2 seconds for low power, and the other way round for high power.

 

[Dr_Doggy]

My 12v "Revzilla Heat Troller" handles my 90w bike suit with no problem, but idk what the max power is for it, or the power of your seat.

 

[crutschow]

An easy and high-efficiency way is to switch a power MOSFET in series with the heater driven by a low-frequency PWM signal such as from a 555 oscillator circuit.