Hey there, if your car's AC fan is acting up or only works on one speed, this QTJ 3-speed blower switch might be exactly what you need! This is a direct replacement for genuine INDAK brand switches and works as a universal fit for many vehicles. It's a rotary-style switch with a plastic 'FAN' knob that has that familiar 1/4\ 'D' shaft. The body is about 1\ x 1\ square with a threaded shaft that's 7/16\ in diameter and about 3/8\ long. It's got 5 spade terminals - here's how they work: the 'H', 'M', and 'L' terminals are for your fan speed leads (high, medium, low), the 'B' terminal is where your power comes in, and the 'C' terminal connects to your clutch, thermostat, or switch depending on your setup. Important note: this switch is rated for 12 volts and 25 amps, and it DOESN'T have a ground terminal since most systems are internally or externally grounded. Also, this won't magically turn your single-speed motor into a 3-speed one - it's specifically for motors that are already 3-speed capable. It replaces a bunch of part numbers from Four Seasons, Honda, Freightliner, Kenworth, and many others. If your blower only works on high or not at all, this switch could be your fix!