w124 e300 intermittent wipers / wiper parking

[devonair]

Would appreciate help from the forum for the following:-

Problems with 1994 e300 wipers.

1. Intermittent wipe does not work at all.
2. Wiper stops immediately when switched off and not in the park position.

When switching the stalk switch to intermittent wipe the relay N10? can be heard to click every few seconds, meaning the switch is OK?

Browsing similar problems on the forum I have replaced the wiper motor assembly which has the parking contacts and the relay with secondhand items.

Either I have been unlucky with one of the replacement items or there is another fault. AAArgh

Any idea's would be most welcome, thanks.

 

[television]

thinking about this, if you take the flat cover off, that will give you access to the parking contacts.

Tell me please has it always been like this, or did this fault appear after you bought the car, the one common thing here is that the intermitent only uses the parking bit of the wipers, if the wiring has not been touched, it should be the moter contacts, I forget the fusing, is there more than one.

Malcolm

 

[devonair]

Hi Malcolm

Owned the car 8 years, fault started a few months ago, think the not parking thing was intermittent to start with, so logically it should be the motor contacts as you described in previous threads.

Have taken cover off the motor contacts of the original motor assembly and they are not broken and look in good condition.

I believe there are two fuses in the circuit and they meter out OK.

Steve

 

[television]

OK the N10 is known to have faults, often dry joints , I think that either you meter the output to the wiper, or open up the N10 and check the soldering around the relay,and check the relay contact, these go to an inductive load that can burn the contacts over a period of time.

Malcolm,


Plastic pipe solvent is a good way of glueing up

 

[devonair]

Have removed relay cover and resoldered some of the pins on the circuit board of the original relay, a couple of the pins looked like dry joints, but no improvement, which is why I swapped in a replacement.
Think you are right and the only way is to meter out the circuit. although the wiring diagrams I have are pretty poor.

Steve

 

[television]

Don't forget that the fuse holders go down on these cars, you may measure 12v on the top of the fuse,but there may be nothing coming off the other end of the fuse holder, spraying them with switch cleaner sometimes helps and turn the around them the way. Normally with the intermitant pressed , just apply slight presure on the fuses.

Malcolm

 

[Bolide]

Clean Scotchbrite pads are good for cleaning fuses & fuseholders

Nick Froome
www.w124.co.uk

 

[devonair]

Hi Nick, and thank you for that info.

From my rather poor (Haynes manual up to 1993 models) wiring diagram, fuses 2 and 10 are involved.

Question - If it was a fuse or a voltage supply failure wouldn't the wipers not work at all? They do work perfectly, apart from the not parking problem, in slow and fast mode.

 

[Jason C]

Would appreciate help from the forum for the following:-

Problems with 1994 e300 wipers.

1. Intermittent wipe does not work at all.
2. Wiper stops immediately when switched off and not in the park position.

When switching the stalk switch to intermittent wipe the relay N10? can be heard to click every few seconds, meaning the switch is OK?

Browsing similar problems on the forum I have replaced the wiper motor assembly which has the parking contacts and the relay with secondhand items.

Either I have been unlucky with one of the replacement items or there is another fault. AAArgh

Any idea's would be most welcome, thanks.

Hello, I know this is an old post, but I'm having exactly the same problem. Can anyone give me some advice?

Thanks

 

[d215yq]

Fuse 2 in the fusebox feeds the relays/wipers and a bad contact/fuse has caused wiper problems/N10 relay problems on two W124s. In each case the relay worked once the fuse 2 was replaced although it was clicking/not working properly before i tried the fuse

 

[Jason C]

Ok, thanks. I will give that a try.