Windshield wiper turns on with lights?

Hi,

That's an interesting one. LOL Do me a favor. Disconnect the headlamp that is dimmer than the other and see if the wipers still turn on.

I'm suggesting this because if the light is dimmer, there is a chance we have a bad ground and power is back feeding to the wipers.

Let me know what happens.

Take care,

Joe

Yes, when I disconnect the wipers function correctly. Also, the resistor for the AC/heat fan has had issues in the past. I replaced it twice, but it still functions poorly. Sometimes it has a good connection, sometimes not and the fan doesn’t work. I don’t know if they are related but just in case, I thought I’d inform you. Thank you. This has sucked trying to figure it out. I appreciate the help.

Wiring issues are usually crazy. I just looked through the schematics. I noted that the body control module controls the wiper motor and washer.

Both the headlamp and wiper share a common ground, G101 at the left front of the engine compartment.

There will be a black wire at the headlamp connector. Follow that to the ground location and inspect it for corrosion, damage, or if it is loose. Or provide a new ground wire.

Pic 2 below shows the ground location.

Let me know what you find.

Joe

See pics below.