windshield wipers not working
Thread Starter
Junior Member
Joined: Apr 2015
Posts: 20
Likes: 0
2007 ml350
windshield wipers not working
hey fellas,
i have an 07 ml350 and the wipers dont turn on anymore. windshield fluid will still pumps and squirt.
i checked fuses 100 in front and 60 in rear. both good.
i wasnt sure which relay controls wipers, but i swapped the liked colored ones around. still not working.
wiper connector is on tight at motor.
and it may be random, but the "SRS" dash light came on a week ago also.
any ideas?
i have an 07 ml350 and the wipers dont turn on anymore. windshield fluid will still pumps and squirt.
i checked fuses 100 in front and 60 in rear. both good.
i wasnt sure which relay controls wipers, but i swapped the liked colored ones around. still not working.
wiper connector is on tight at motor.
and it may be random, but the "SRS" dash light came on a week ago also.
any ideas?
Member
Joined: Jun 2012
Posts: 108
Likes: 10
From: Switzerland
2019 S560 Maybach
Doubt it's the cause of your problems, but worth checking either way.
I had my rain/light sensor go out. (Mounted be hid rearview mirror on windshield). That meant that the automatic wiping and headlight feature no longer worked and the command unit thought it was night all the time (dark color combo).
Try checking sensors like that, but it sounds like something else is lurking in your car.
Diagnostic check could yield some answers.
I had my rain/light sensor go out. (Mounted be hid rearview mirror on windshield). That meant that the automatic wiping and headlight feature no longer worked and the command unit thought it was night all the time (dark color combo).
Try checking sensors like that, but it sounds like something else is lurking in your car.
Diagnostic check could yield some answers.
Newbie
Joined: Oct 2010
Posts: 6
Likes: 1
From: Helsinki
2008 C230T Sport (W203 M272)
Hi
I had an issue with SRS light coming on and no wipers or power to cig lighter. I finally resolved this problem by replacing the Q relay under the hood in the electrical box. It has not happened since I have done this. 14 Euros for the relay. Maybe worth a try.
I also swapped the L and Q relays but still had the same problem. But once I replaced the Q relay all was back to normal.
I had an issue with SRS light coming on and no wipers or power to cig lighter. I finally resolved this problem by replacing the Q relay under the hood in the electrical box. It has not happened since I have done this. 14 Euros for the relay. Maybe worth a try.
I also swapped the L and Q relays but still had the same problem. But once I replaced the Q relay all was back to normal.
Last edited by Storyjk; Apr 29, 2015 at 05:22 AM.
Thread Starter
Junior Member
Joined: Apr 2015
Posts: 20
Likes: 0
2007 ml350
Hi
I had an issue with SRS light coming on and no wipers or power to cig lighter. I finally resolved this problem by replacing the Q relay under the hood in the electrical box. It has not happened since I have done this. 14 Euros for the relay. Maybe worth a try.
I also swapped the L and Q relays but still had the same problem. But once I replaced the Q relay all was back to normal.
I had an issue with SRS light coming on and no wipers or power to cig lighter. I finally resolved this problem by replacing the Q relay under the hood in the electrical box. It has not happened since I have done this. 14 Euros for the relay. Maybe worth a try.
I also swapped the L and Q relays but still had the same problem. But once I replaced the Q relay all was back to normal.
I did swap relays around with no change. The only relay i didn't swap was a small black one because it was the only one. What exactly are L Q relays? I'm going to look at those again and also check to see if water got into rear sam module.
Newbie
Joined: Oct 2010
Posts: 6
Likes: 1
From: Helsinki
2008 C230T Sport (W203 M272)
The Q relay is the Wiper On/Off relay
The L Wiper speed 1 and 2.
I have attached the diagram of the fwd relay box.
The Q and L relays on my car were Yellow. (Q is now Purple)R and P are Black and M is Grey.
The Q replacement I think was Bosch made in Portugal and Purple in color.
The L Wiper speed 1 and 2.
I have attached the diagram of the fwd relay box.
The Q and L relays on my car were Yellow. (Q is now Purple)R and P are Black and M is Grey.
The Q replacement I think was Bosch made in Portugal and Purple in color.
Last edited by Storyjk; Apr 29, 2015 at 01:06 PM.
Thread Starter
Junior Member
Joined: Apr 2015
Posts: 20
Likes: 0
2007 ml350
The Q relay is the Wiper On/Off relay
The L Wiper speed 1 and 2.
I have attached the diagram of the fwd relay box.
The Q and L relays on my car were Yellow. (Q is now Purple)R and P are Black and M is Grey.
The Q replacement I think was Bosch made in Portugal and Purple in color.
The L Wiper speed 1 and 2.
I have attached the diagram of the fwd relay box.
The Q and L relays on my car were Yellow. (Q is now Purple)R and P are Black and M is Grey.
The Q replacement I think was Bosch made in Portugal and Purple in color.
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Member
Joined: May 2012
Posts: 205
Likes: 12
Mercedes Benz, BMW
thanks for your help. i ended up taking the car to the dealer. they said they found a bad relay in the rear sam. they also said there were some engine codes that would not clear. the tech wants to look at vehicle tomorrow also. so i will know tomorrow what else they find.
Last edited by vladc77; Mar 23, 2016 at 05:38 PM.
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Newbie
Joined: Jun 2004
Posts: 2
Likes: 0
From: Memphis, TN
'91 500sl, '07 ML350
I'm having same issues w my '07 ml350. Did the K relay solve your problem? How much did the part (relay) cost? Is it difficult to DIY? I have already tried to fix it by replacing the front relay (one of the two yellow relays) both wiper related, but that did not fix the issues. Thanks.
Member
Joined: May 2012
Posts: 205
Likes: 12
Mercedes Benz, BMW
I'm having same issues w my '07 ml350. Did the K relay solve your problem? How much did the part (relay) cost? Is it difficult to DIY? I have already tried to fix it by replacing the front relay (one of the two yellow relays) both wiper related, but that did not fix the issues. Thanks.
Yes, it solved my issues. You can read my post about it from here: https://mbworld.org/forums/gl-class-...ml#post6750076
I learned it the hard way since my relay worked intermittently and diagnostic tool pointed out to front SAM. The part cost is about $10. Hope it helps.
Newbie
Joined: Jun 2004
Posts: 2
Likes: 0
From: Memphis, TN
'91 500sl, '07 ML350
Thanks! I had wanted to take my ML350 to FL tomorrow for the 4th weekend but not w/o windshield wipers but can't get it into the shop until next Wed. That's why I was wondering if you did the relay replacement yourself. If you did, did you need to do any resetting of codes etc. (something I know nothing about). Thanks again.
Super Member
Joined: Nov 2011
Posts: 561
Likes: 9
From: Always Sunny & beautiful, Costa Rica
CLS55 AMG, ML63 AMG, Cayenne S
Yes, it solved my issues. You can read my post about it from here: https://mbworld.org/forums/gl-class-...ml#post6750076
I learned it the hard way since my relay worked intermittently and diagnostic tool pointed out to front SAM. The part cost is about $10. Hope it helps.
I learned it the hard way since my relay worked intermittently and diagnostic tool pointed out to front SAM. The part cost is about $10. Hope it helps.
