High beam/Wipers/Washer

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Marc
250s
Posts: 272
Joined: Sat 30 Oct, 2010 9:20 pm
Model you own: w108
Location: Sydney

High beam/Wipers/Washer

Post by Marc » Sun 31 Dec, 2017 1:09 pm

Hi team,

A couple of weeks ago, I noticed that the high beam flasher function stopped working. Pulling the stalk towards you does not result in the high beams coming on. I didn't think much of it, made a mental note to address this at some stage.

Then, at some stage I was driving and it started sprinkling. Upon turning on the wipers, all I heard was a buzzing noise. Similar (but different) to when you leave the lights on with the engine off and you open the door. This buzzing noise could be heard in all three wiper settings (interval, standard, fast). Also, the window washer function does not respond anymore.

After some research, I thought that perhaps the connections on the stalk itself were failing. I obtained another "known good" stalk and plugged that in. Unfortunately, this did not resolve the problems.

For what it's worth: the indicators work fine and also the high beams when pushing the stalk away from you.

Any ideas on what could be causing this and how I can resolve this?

Thank you.

Marc.
280SE 3.5 - 1972 (Sofia)
280E - 1984 (Linda)
B180 CDI - 2007 (Diana)

mathuisella
Zeppelin
Posts: 439
Joined: Sun 08 Jun, 2014 6:03 am
Model you own: w123
Location: Brisbane, North side.

Re: High beam/Wipers/Washer

Post by mathuisella » Sun 31 Dec, 2017 4:07 pm

can you get a multimeter onto the wiper motors as you go and press each setting ( with a friend ) and note down the voltages and come back ?

someone else can do the same and compare ?

i had a buzzing sound in my car last 2 nights due to a low voltage battery as alternator died :(

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Thunderbolt
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Location: Wheat belt WA

Re: High beam/Wipers/Washer

Post by Thunderbolt » Sun 31 Dec, 2017 6:44 pm

I had a similar problem but it was only my washer. I too tried another switch to no avail. I wound up taking the back off the big plug and testing the points there. I ran power back from the washer motor and got nothing at the plug so it must have been a broken wire under the dash or something so I ran another wire from the big plug to washer motor. Bodgy maybe but I've got squirters again.

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Marc
250s
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Joined: Sat 30 Oct, 2010 9:20 pm
Model you own: w108
Location: Sydney

Re: High beam/Wipers/Washer

Post by Marc » Tue 02 Jan, 2018 1:07 pm

Hi team,

Thanks for the suggestions so far. I have started to work my way to the wiper motor. The issue is that I got stuck at removing the centre panel as it seems that the bolt that holds the wiper in place does not want to come off.

Am I supposed to screw this off? See picture for illustration purposes.

I measured the battery and it read 12.55V. So there shouldn't be a problem there, I would think.
passenger_side_wiper.jpg
Marc.
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280SE 3.5 - 1972 (Sofia)
280E - 1984 (Linda)
B180 CDI - 2007 (Diana)

tsharkey
C 111
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Model you own: w123
Location: Melbourne, Vic

Re: High beam/Wipers/Washer

Post by tsharkey » Tue 02 Jan, 2018 2:49 pm

Marc wrote:
Tue 02 Jan, 2018 1:07 pm
Am I supposed to screw this off? See picture for illustration purposes.
Yes, it screws off - May be screw back on a bit and use some RP7.

You can test the wiper motor in situ without pulling apart as it plugs through the firewall - There is a 6 pin plug in the mounted in the middle of the plenum. Take it off and apply 12v to the pins 3 (Earth) + 4 (Normal Speed) on the plenum to see if you get Wiper motors movement instead of buzzing. Also, do you get 12v on those 2 pins when the wipers are on ? Do you ave 12v on Pin 1 all the time? (that is needed for the auto return)

Also apply 12v to the washer motor (in the water bottle). Water spurting ?

Do you have 12v across Fuse 6 ?

I am pegging you have an earth leackage problem that is triggering the headlight buzzer ..... It will be a process of elimination.
W123 1981 300TD - Family Kid mover
W202 1998 C250D Factory OM605A Turbo - Partner's daily driver
W123 1982 300CD Retro fitted OM617A Turbo - Mine
W123 1984 300TD 5 Speed Manual, to teach the kids how to drive
W123 1982 300TD Factory OM617A Turbo (Hans) - Project
W123 1985 230TE - Brother's
W123 1985 300D - Sister in Law's
1962 S-Series Valiant (Tho Daimler & Chrysler divorced, still part of the extended family)

Past benzes
W114 1969 250CE - PO put in an M110 transplant and nearly sent me around the bend
W123 1981 300TD - "Matilda" - RIP hit front side & rear but left my brother + niece A-OK

Current Projects
Coupe restoration, Turbo Wagon freshen up

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Marc
250s
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Joined: Sat 30 Oct, 2010 9:20 pm
Model you own: w108
Location: Sydney

Re: High beam/Wipers/Washer

Post by Marc » Mon 08 Jan, 2018 8:19 pm

Hi Team,

Thanks for all the support. After further troubleshooting, a friend of mine came with the idea to check the fuses. After reseating fuse #6, the wipers (and high beam) started working again.

Needless to say, I replaced this fuse, along with a bunch of other ones that looked a bit dodgy.

tsharkey was right with checking if there was 12V across fuse 6!

Thanks again for all your suggestions.

Marc.
280SE 3.5 - 1972 (Sofia)
280E - 1984 (Linda)
B180 CDI - 2007 (Diana)

gazman
Gelandewagen
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Joined: Sun 10 Apr, 2016 1:16 pm
Model you own: w126
Location: Nth Dandalup WA

Re: High beam/Wipers/Washer

Post by gazman » Mon 08 Jan, 2018 11:36 pm

Are your fuse's copper if not replace with copper ones. Aluminium one's are a known cause of electrical gremlins ( dissimilar metals)
1989 560 SEL King of the road

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