Why is my wiper motor not turning on?
If you get ground, that confirms the FCM is receiving digital data from the controller and is acting properly. If you don’t get ground, the problem can be a faulty FCM, a corroded IPM or TIPM (very common) or a short in the data bus. As I mentioned, the MFS doesn’t switch power to the wiper motor.
How does a high speed wiper motor work?
When the driver switches the Multifunction Switch (MFS) to HIGH, the controller sees the request, sends a digital signal to the FCM, and the FCM provides ground to the control coil of the High/Low relay. The contacts move and power is switched to the high speed wire going to the wiper motor. What goes wrong.
How does the front wiper on / off relay work?
Power flows to the control coil side of the front wiper ON/OFF relay from a fuse that’s hot all the time. The control coil now has power, but no ground. The front control module (FCM) housed in the Integrated Power Module (IPM) or Totally Integrated Power Module (TIPM—used in later models) is what provides the ground to the ON/OFF relay.
Why does my Wiper not work at Terminal 86?
Now, turn the wiper switch to LOW and check for ground at terminal 86 in the wiper ON/OFF relay socket. If you get ground, that confirms the FCM is receiving digital data from the controller and is acting properly. If you don’t get ground, the problem can be a faulty FCM, a corroded IPM or TIPM (very common) or a short in the data bus.
Why are my wipers not working on my Mercedes?
It is common for the fuse to burn out if you press the window switch to active the wipers, but the wipers have frozen, or there is snow on the windshield. Replacing the fuse may be all that you need to do to fix the wiper problem on your Mercedes-Benz.
Why are my windshield wipers not working on my Mini Cooper?
Hi I have a 2005 mini cooper and the windshield wipers will not work. I changed the fuse the relays and the wiper motor. I have rear wipers and both front and rear washers. Just no front wipers. What else can it be.
What are the most common windshield wiper problems?
Mercedes Wiper Problems Go to top 1 I- Windshield wiper motor runs, but the arms don’t move. 2 II- Turn Signal, Horn, Wipers all have stopped working. 3 III- Installed new wipers and the wipers stopped working. 4 IV- Wiper hesitates to move or move very slowly. 5 V- Mercedes Windshield Wipers work erratically.
What should I do if my windshield wiper wont move?
Typical symptoms are: -a slow wiper movement as the wiper moves on the windshield. You should lubricate the wiper mechanism at the center (bottom) of the windscreen. Remove the cover from the wiper arm and use a lithium grease such as Liquid Wrench White Lithium Grease.