Wipers not working
08-02-2018, 04:08 PM
#1
Junior Member
Thread Starter
Wipers not working
For a while the wipers haven’t been working. The motor was changed and still didn’t work. The motor was confirmed to work as well as the wiper switch and there was power (correct amount) going to the wiper motor, still nothing (the washer didn’t work either). Then a couple months later it started working again but it was still a bit wonky. If the speed was on full it change from fast to slow, sometimes going really slow for a couple secs.
Then it stopped working again and now a month later the wipers move halfway up the windscreen and stopped, (the washer sprayed when I press the stalk). The wipers didn’t do anything after that despite roasting the stalk. I tuned the car off and pushed the wipers down, turned it on again the the wipers nor washers seem to work. The headlight washers always worked fine.
What could be th cause of this as the motor, stalk, washer pump and rain sensor seem to be fine. Is there a SAM module that is involved as it could be a bit of rust or corrosion somewhere that could cause this?
Then it stopped working again and now a month later the wipers move halfway up the windscreen and stopped, (the washer sprayed when I press the stalk). The wipers didn’t do anything after that despite roasting the stalk. I tuned the car off and pushed the wipers down, turned it on again the the wipers nor washers seem to work. The headlight washers always worked fine.
What could be th cause of this as the motor, stalk, washer pump and rain sensor seem to be fine. Is there a SAM module that is involved as it could be a bit of rust or corrosion somewhere that could cause this?
Last edited by Junaid6305; 08-02-2018 at 04:11 PM.
08-04-2018, 11:50 AM
#3
Junior Member
Thread Starter
The wiper fuse (number 56) is fine. A weird thing that happens which I noticed now is if I hold down the stalk to activate the washer when the car is off and at the same time turn on the ignition the washer sprays for about 2 secs (after turning the key) then stops, the wiper doesn’t turn. If I try press it again or activate the wipers it doesn’t work
08-04-2018, 11:59 AM
#5
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Thread Starter
http://www.mercedesmedic.com/fuses-w...-2008-e-class/
08-04-2018, 02:18 PM
#6
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Next step if you have not already done so check wiper system nuts. If fine, wiper motor m6/1 wired direct to front SAM n10/1 remove SAM (engine compartment) to check front & rear.
Last edited by konigstiger; 08-04-2018 at 02:20 PM.
08-06-2018, 04:58 AM
#7
Junior Member
Thread Starter
Is there no wiper relay that I can check first before removing the whole SAM. It was mentioned earlier in this thread but I’m not sure which relay the the right one and can’t seem to find out anywhere.
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08-16-2018, 06:51 AM
#8
Junior Member
Thread Starter
I checked M1 and everything looks fine. There’s about 12V going to the wiper motor. Maybe there’s something wrong with the switch circuit. How does the stalk connect to the motor?
08-16-2018, 02:25 PM
#9
Symptoms of a failing wiper motor to me. Have you carried out any work on wiper assembly area including dismantling? It happened to me once when a mechanic after removing the wiper mechanism, had it incorrectly installed. I didn't realize but washer stopped working after that and it only worked when I had wipers in upright position! Update your profile, location? I have a spare wiper motor with me.
08-16-2018, 03:03 PM
#10
Junior Member
Thread Starter
About a year or two ago we put in a new motor and that didn’t work either. We tested both and both worked (old and new). So we just left he old one in. A couple of months later the wipers and washer started working again, then a couple of months after working they washer and wiper stopped. In the period where it worked no work was carried out on the wiper assembly or anything in that area. (This whole time the headlight washers still worked). It could be a failing motor now but I highly doubt it as when we put a new motor before it still didn’t work.
08-17-2018, 05:51 AM
#12
Junior Member
Thread Starter
I do have a new motor so I might just change it to rule out a faulty motor anyway. Also won’t the washers still work even if the motor is faulty? I’ll try and get it diagnosed with Star as well.
08-17-2018, 04:30 PM
#13
Senior Member
You said you confirmed the switch was working, but I remember having this same issue and replacing the stalk/switch. One of the wires inside were fried, blue or white don’t remeber. When I removed the stalk from the steering column I saw through an opening the fried wiring inside the stalk/switch
08-17-2018, 04:36 PM
#14
Junior Member
Thread Starter
I could try that. I have a feeling it’s something to do with the connection between the stalk and wipers. Is there any circuit diagram of how the stalk connects to the wipers anywhere? (I can’t seem to find one)
09-07-2018, 11:12 AM
#15
Junior Member
Thread Starter
Solved
At first glance the connector which connects to the wiper motor looks fine but if you look closer you can see a bit of green (copper corrosion) and if you open the flap there is corrosion inside (not a lot though). Once I cleaned that up the wipers and washers are (finally) working as normal.
