Front and rear windshield washer
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From: Sydney, Australia
2001 Ml 320
Front and rear windshield washer
Hi Guys,
I have a 2001 ML 320 April plated.
I brought new washer front and rear pumps and they are not working, i plugged the washer pump in and held it while it was activated and nothing.
I check the steering column stalk blue wire when pulling to activate washer and can see on volt metre this is working.
Is there anything else this could be?
i really appreciate your help
I have a 2001 ML 320 April plated.
I brought new washer front and rear pumps and they are not working, i plugged the washer pump in and held it while it was activated and nothing.
I check the steering column stalk blue wire when pulling to activate washer and can see on volt metre this is working.
Is there anything else this could be?
i really appreciate your help
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From: Bronx, N.Y.
2002 ML 320 & 2006 ML500
Glen, the front and rear washers work off of two different circuits, so I doubt very seriously it is a power issue.
But both circuits work off of the same ground (W9). Remove the left front headlight an check the ground wires.
But both circuits work off of the same ground (W9). Remove the left front headlight an check the ground wires.
Thread Starter
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From: Sydney, Australia
2001 Ml 320
will give it a go tomorrow :-) you should be getting paid for all the info you give out!
Thread Starter
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2001 Ml 320
i tested the earth and it works fine, i tested at the connection for pumps and there is none when stalk is pulled, rear one you can hear relay and looks like a small amount of power constant through it?
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From: Bronx, N.Y.
2002 ML 320 & 2006 ML500
OK we will have to start from the beginning.
1. The blue wire that you checked, was it in the #20 position?
2. Were you getting a full 12v?
Now we will only work with the front wipers, but for the time being conduct a test on both relays, K17 front and K27 rear. Remove each relay & with the key in the #2 pos, and with a fashioned jumper wire w/ spade terminals attached, test slots 30, 85 & 86 for 12v.
Everything depends on your results of the tests. If you use a bare wire for the tests, you might not make contact with the one contact point in each slot.
1. The blue wire that you checked, was it in the #20 position?
2. Were you getting a full 12v?
Now we will only work with the front wipers, but for the time being conduct a test on both relays, K17 front and K27 rear. Remove each relay & with the key in the #2 pos, and with a fashioned jumper wire w/ spade terminals attached, test slots 30, 85 & 86 for 12v.
Everything depends on your results of the tests. If you use a bare wire for the tests, you might not make contact with the one contact point in each slot.
Thread Starter
Junior Member
Joined: Mar 2013
Posts: 31
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From: Sydney, Australia
2001 Ml 320
OK we will have to start from the beginning.
1. The blue wire that you checked, was it in the #20 position?
2. Were you getting a full 12v?
Now we will only work with the front wipers, but for the time being conduct a test on both relays, K17 front and K27 rear. Remove each relay & with the key in the #2 pos, and with a fashioned jumper wire w/ spade terminals attached, test slots 30, 85 & 86 for 12v.
Everything depends on your results of the tests. If you use a bare wire for the tests, you might not make contact with the one contact point in each slot.
1. The blue wire that you checked, was it in the #20 position?
2. Were you getting a full 12v?
Now we will only work with the front wipers, but for the time being conduct a test on both relays, K17 front and K27 rear. Remove each relay & with the key in the #2 pos, and with a fashioned jumper wire w/ spade terminals attached, test slots 30, 85 & 86 for 12v.
Everything depends on your results of the tests. If you use a bare wire for the tests, you might not make contact with the one contact point in each slot.
Thanks for the reply,
Front relay, only got 12 volts from jump #86, #85 had .02
Rear relay, 12 volts @ #30, 12 volts @ #86
will retest steering stalk as well
Kind Regards
Last edited by Glenn Polner; Mar 28, 2013 at 01:54 AM.
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MBWorld Fanatic!
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From: Bronx, N.Y.
2002 ML 320 & 2006 ML500
Front relay: stick one end of th wire into respective slot and test the other end.
#30............?
#85...........?
#86..........?
Glen, so we make this simple for both of us, answer questions individually.
Also, you didn't answer the first question. Was the blue wire in position #20?
#30............?
#85...........?
#86..........?
Glen, so we make this simple for both of us, answer questions individually.
Also, you didn't answer the first question. Was the blue wire in position #20?
Thread Starter
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From: Sydney, Australia
2001 Ml 320
Hi Maj.
Key in to position 2
Front Relay
#30... 0.00 Volts
#85....0.05 Volts
#86...12.19 Volts
Tested the blue wire in position #20...... 10 Volts
Kind Regards
Key in to position 2
Front Relay
#30... 0.00 Volts
#85....0.05 Volts
#86...12.19 Volts
Tested the blue wire in position #20...... 10 Volts
Kind Regards
Last edited by Glenn Polner; Mar 28, 2013 at 02:30 AM.
Thread Starter
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From: Sydney, Australia
2001 Ml 320
OK, the grey wire supplies voltage to slot #30 at the fuse block. Are you absolutely sure that slot 30 has no voltage?
Thread Starter
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2001 Ml 320
MBWorld Fanatic!
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From: Bronx, N.Y.
2002 ML 320 & 2006 ML500
While I'm looking at the diagrams, do the following:
1. Replace both relays.
2. Key on.
3. Again test grey wire in pos. #19, with switch off.
4. With switch on.
1. Replace both relays.
2. Key on.
3. Again test grey wire in pos. #19, with switch off.
4. With switch on.
Thread Starter
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2001 Ml 320
Hi Maj,
1. Replaced both relays.
2. Key on.
3. grey wire in pos. #19, with switch off. zero Volts
4. grey wire in pos. #19 With switch on. 11.00 Volts was varying with wiper motion
Kind Regards
1. Replaced both relays.
2. Key on.
3. grey wire in pos. #19, with switch off. zero Volts
4. grey wire in pos. #19 With switch on. 11.00 Volts was varying with wiper motion
Kind Regards
Thread Starter
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From: Sydney, Australia
2001 Ml 320
Hi Maj.
At the switch on the column:
1. Key on test #15 wire Orange for 12v with switch off - 0 VOLTS
2. Key on test #15 wire Orange for 12v with switch on - 12 Volts vary with wiper
3. While pulling wash, test #20 wire Blue for 12V. - 10.90 Volts
Kind Regards
At the switch on the column:
1. Key on test #15 wire Orange for 12v with switch off - 0 VOLTS
2. Key on test #15 wire Orange for 12v with switch on - 12 Volts vary with wiper
3. While pulling wash, test #20 wire Blue for 12V. - 10.90 Volts
Kind Regards
MBWorld Fanatic!
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From: Bronx, N.Y.
2002 ML 320 & 2006 ML500
OK, now we have to move to the fuse box. Remove both plastic covers. Then remove 3 additional screws and pull fuse/relay module out of box and lay it on its back on a folded towel. Turn key on.
1. Locate connector C/B wire #4 Blue have someone hit the washer switch and you test for 12 v at the blue wire. Results?
2. Then locate connector ML/A wire #2 Blue, have someone hit washer etc. Results?
Note, all connectors run as follows: top row 1,3,5,7 etc. bottom row 2,4,6,8 etc.
1. Locate connector C/B wire #4 Blue have someone hit the washer switch and you test for 12 v at the blue wire. Results?
2. Then locate connector ML/A wire #2 Blue, have someone hit washer etc. Results?
Note, all connectors run as follows: top row 1,3,5,7 etc. bottom row 2,4,6,8 etc.
Thread Starter
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From: Sydney, Australia
2001 Ml 320
OK, now we have to move to the fuse box. Remove both plastic covers. Then remove 3 additional screws and pull fuse/relay module out of box and lay it on its back on a folded towel. Turn key on.
1. Locate connector C/B wire #4 Blue have someone hit the washer switch and you test for 12 v at the blue wire. Results?
2. Then locate connector ML/A wire #2 Blue, have someone hit washer etc. Results?
Note, all connectors run as follows: top row 1,3,5,7 etc. bottom row 2,4,6,8 etc.
1. Locate connector C/B wire #4 Blue have someone hit the washer switch and you test for 12 v at the blue wire. Results?
2. Then locate connector ML/A wire #2 Blue, have someone hit washer etc. Results?
Note, all connectors run as follows: top row 1,3,5,7 etc. bottom row 2,4,6,8 etc.
Just started raining heavily and i am working out doors so have had to stop for now, are you thinking AAM? probably why my remote central locking is not working as well?
Will test tomorrow and post results, i can not thank you enough for all your help
Kind Regards
MBWorld Fanatic!
Joined: Oct 2011
Posts: 7,107
Likes: 765
From: Bronx, N.Y.
2002 ML 320 & 2006 ML500
Hi Maj.
Just started raining heavily and i am working out doors so have had to stop for now, are you thinking AAM? probably why my remote central locking is not working as well?
Will test tomorrow and post results, i can not thank you enough for all your help
Kind Regards
Just started raining heavily and i am working out doors so have had to stop for now, are you thinking AAM? probably why my remote central locking is not working as well?
Will test tomorrow and post results, i can not thank you enough for all your help
Kind Regards
Tell me what happened. Did these things all go out at the same time. I should have asked you this, but moreover you should have told me.
Also, please answer the question in post #23.
