ML320 only one low beam, one high beam
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2000 c280
ML320 only one low beam, one high beam
Hello, I have a 2003 ML320, and yesterday I noticed I have only left low beam, and when I switch to high beam I only have right high beam! I can hear a clicking noise coming from behind the left headlight! Also when I pull back the headlight lever both high beams work that way. Was wondering if anyone one out there has encountered this issue! Any help would be super, thanks, and have a great day
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From: Palm Beach County, Fl.
W163 ML500 w/Kleeman headers (gone but not forgotten); R63
Hello, I have a 2003 ML320, and yesterday I noticed I have only left low beam, and when I switch to high beam I only have right high beam! I can hear a clicking noise coming from behind the left headlight! Also when I pull back the headlight lever both high beams work that way. Was wondering if anyone one out there has encountered this issue! Any help would be super, thanks, and have a great day
I don't recall if we have separate bulbs for low and high beams on the ML's, but I believe we do. Check fuses. You can always swap bulbs side to side to confirm bad bulbs.
Regards,
Jerry
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From: Bronx, N.Y.
2002 ML 320 & 2006 ML500
The designation of left and right is determined as you sit in the vehicle, not looking at it from the front. So now with that information:
1. Which low beam does not operate?
2. Which headlight is the noise coming from?
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2000 c280
Left low beam only when you turn lights on! when you push stalk forward only right high high beam works, when you pull stalk back both high beams and left low beam illuminate!
The right low beam does not work
The left high beam does not work
Clicking comes from left headlight.
The right low beam does not work
The left high beam does not work
Clicking comes from left headlight.
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From: Bronx, N.Y.
2002 ML 320 & 2006 ML500
Left low beam only when you turn lights on! when you push stalk forward only right high high beam works, when you pull stalk back both high beams and left low beam illuminate!
The right low beam does not work
The left high beam does not work
Clicking comes from left headlight.
The right low beam does not work
The left high beam does not work
Clicking comes from left headlight.
The way this confusing system works is when you turn the headlights on it sends a signal to the AAM which in turn sends a signal to the EAM and then to the headlights.
Remove the covers on the steering column and access the connector to the light switch. It should be an 8pin connector with:
#1 pin being Pink
#2 pin being Blue operates R/S low beam
#3 in being Orange operates L/S low beam
Turn the headlights on and with a test light or volt meter, check to see if there is battery voltage at pin #2 Blue wire R/S low beam
Also check pin #3 Orange wire L/S low beam. If pin #2 does not show voltage and pin #3 does, then you are assured that the problem is with the combination switch.
If you get voltage at both pins then your problem is either with the AAM or EAM. Post the results and we will go from there.
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2000 c280
Ok, so finally was able to test those wires, and they both power up fine! To be on the safe side, I borrowed a used operational combination switch from a friends salvage yard! Still, same problem. One low beam, one high beam! Now I have a bigger problem! I disconnected battery to change comb. switch and now my windows, moonroof, or mirrors won't work?..
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From: Bronx, N.Y.
2002 ML 320 & 2006 ML500
You didn't need to remove and replace the combo. switch to check it. The only thing you had to do was remove the elec. connector from the old one and plug it into the new one and check its functionality.
If you are still having the problem with the windows, roof and mirrors, remove and reinsert the K14 relay then check for operation. If not do the same with the K15 relay.
If you are still having the problem with the windows, roof and mirrors, remove and reinsert the K14 relay then check for operation. If not do the same with the K15 relay.
Last edited by Maj. Dundee; Jan 17, 2012 at 07:08 AM.
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2000 c280
Ok, so I removed and re-inserted both k14, and k15 relays under the hood. I'm at a total blank with this problem? Would a faulty BCM cause all off these problems? Again, thanks for all responses and help!
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2002 ML 320 & 2006 ML500
Working with just the windows, turn the key to position #2 and in the right side fuse box, with a test light or DVOM check to see that you get voltage at both contacts of fuse 24 & 25 (green circle). If you do then there should be no reason why the windows don't work.
If not, with the key in pos #2, pull relay K8 and check for voltage at pins 2 & 3.
Last edited by Maj. Dundee; Jan 23, 2012 at 08:02 AM.
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2000 c280
Combination switch is from 2003 ML. I checked 24, and 25 fuse. Both fuses have power at both points on the fuse! Went to a local repair shop that has Benz scanner and he said the scanner cannot comunicate with the module that controls the windows. Does that make any sense?
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Joined: Oct 2011
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From: Bronx, N.Y.
2002 ML 320 & 2006 ML500
Combination switch is from 2003 ML. I checked 24, and 25 fuse. Both fuses have power at both points on the fuse! Went to a local repair shop that has Benz scanner and he said the scanner cannot comunicate with the module that controls the windows. Does that make any sense?
hmroz, correcting this problem can't be very important to you because you are taking a week to respond. Understand that there are many diagrams involved with solving your problems (now that you have added three more to the mix).
I have to re- read these every time you respond a week later. Can you please perform these tests a little quicker.
For the windows, since you say that you are getting power to fuses 24 and 25, the windows should work since there are no relays or modules that control them. The window switch group is its' own processing center, hence control module.
Please re-check fuses 24 & 25 in the right side kick panel, for voltage on both contacts of each fuse.
For the sliding roof, remove fuse #4 and then reinsert. Then push and hold the switch back to the open position for 5 secs.
Swap relay #14 with a similar relay in the underhood fuse box and see if the features work.
Last edited by Maj. Dundee; Jan 30, 2012 at 06:00 AM.
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2000 c280
I apologize for my delay in responding! This is my fathers vehicle which I am trying to correct for him. Problem with this is, he lives 20 miles from me and I rarely see him during the week. Weekends are the most convenient for me! I am thankful for all the assistance that you have given me to try to resolve this issue. Thanks again and apologize for any delays!
