Originally Posted by Black Knight RX7 FC3S
oh man, I needed this so bad lol.
I was wondering how to test the wiper motor to see if it was bad. Mines, like so many other fcs, the wiper only works on low, but it comes on sometimes.
now I can finally test it out lol.
It's a cold day in hell when the wiper motor itself goes bad. Its almost always the wiper switch that is bad and what goes bad is one of the soldered in relays inside the switch.
But to see if the motor works in high/low, just key to ON, then with a piece of wire bare at each end, shove one end of that wire in the back of the wiper motor plug where the blue/white wire is. Motor should move when the other end of the wire is touched to a nearby gnd. Then put the wire in the back of the blue/red wire and repeat. It's best to put water on the windshield or remove the wiper arms prior to doing this so you can tell the diff in wiper speeds.