PeachParts Mercedes-Benz Forum - View Single Post - Any Way to Rig Headlight Wipers on a 124--Turn On When Uni-Wiper is On

dpetryk · #3 06-11-2007, 08:56 AM

Connect a wire from the main wiper motor (black yellow gray) and route it to terminal 4 of the headlamp washer relay (located in the fuse box). Also disconnect the wire that goes to that terminal 4. Otherwise your washer pumps will run when the wipers are on.

A few compromises with this mod.

1. Headlight wipers will only run on "LO". Not on fast or intermittent.

2. Headlamp washer pump will run whenever the wiper runs. Unless you move the connection from this headlight washer pump to the main washer pump. Move the (black red yellow wire on the headlight washer pump to the (violet yellow) wire that you disconnected from terminal 4 of the headlamp washer relay. Or you have the option of just disconnecting the headlamp washer pump altogether.