Screen wiper fuse

[eff eff]

Anyone know how the the wiper motor on a 500 SE is fused? The bible says the wipers are paired with main beam flash but that is working and the wires are not. Before I pull the motor just wondered if anyone had any clues. The wipers stopped when I used the hazards to warn the traffic behind of a jam, the hazards are still working so I don't think they are linked.

[Penelope Stopit]

Do the washers work?

[eff eff]

Yes it does and I can't find another system like horn windows indicators that don't work, so maybe the motor has given up

Edited by eff eff on Tuesday 3rd August 16:15

[Penelope Stopit]

Ok then

The washer switch supply very likely also supplies the motor speed 1 and speed 2

Could be an earth fault though

[eff eff]

Could be as I had a dim flickering of both dash indicator arrow lights just before the wipers stopped, wonder where they are earthed and would they be earthed separately? Guess it could also be a power feed issue??

[eff eff]

[quote=Penelope Stopit]Ok then

The washer switch supply very likely also supplies the motor speed 1 and speed 2


Not sure that is correct, the washer motor runs so its getting power and earth

[Penelope Stopit]

eff eff said:

Penelope Stopit said:

Ok then

The washer switch supply very likely also supplies the motor speed 1 and speed 2


Not sure that is correct, the washer motor runs so its getting power and earth

Sorry but I don't understand your above post in relation to my post

Anyway, more information on the subject was recently posted here https://www.pistonheads.com/gassing/topic.asp?h=0&...

[eff eff]

Penelope Stopit said:

Sorry but I don't understand your above post in relation to my post

Anyway, more information on the subject was recently posted here https://www.pistonheads.com/gassing/topic.asp?h=0&...

if the pump and wipers are on the same circuit then if the pump works the wipers should unless the problem is downstream from the wiper/washer switc, do you understand that?

[Penelope Stopit]

eff eff said:

Penelope Stopit said:

Sorry but I don't understand your above post in relation to my post

Anyway, more information on the subject was recently posted here https://www.pistonheads.com/gassing/topic.asp?h=0&...

if the pump and wipers are on the same circuit then if the pump works the wipers should unless the problem is downstream from the wiper/washer switc, do you understand that?

Yes understood and agree with you

Penelope Stopit said:

Ok then

The washer switch supply very likely also supplies the motor speed 1 and speed 2

Could be an earth fault though

Hence the above post

If the washer pump is working, the switched supply for the pump will very likely be the same supply that's switched to the wiper motor speeds 1 and 2 (better worded now)

The above doesn't mean that the intermittent wiper relay or the wiper motor park circuit are on the same fuse as the switch is, they could be using other fused supplies

To save any confusion I posted you a link to a recent topic with more information, this was done to save repeating what was posted to that topic

The diagram in the other topic re-posted below shows the same supply is used for washers and wipers

Wishing you all the best in finding the fault

[RUSSELLM]

Blimey, that diagram’s hard work on a phone. Gave me an headache.

Quite surprised to see those speed 1 and speed 2 feeds to the motor, coming direct from a switch.

Wonder why they didn’t put relays close to the motor and use smaller wires to the switch ? That wiper switch must look a right mess

[Penelope Stopit]

For anyone looking in using a phone

[eff eff]

Thank you.....think I need an auto electrician

[Penelope Stopit]

You're welcome

Are the wiper blades parked at the bottom of the screen in their park position or are they so far up on the screen?

[eff eff]

They moved about 20 degrees and stayed there, odd thing is the stalk switch was off when they moved, I just saw a dim flicker from the hazards, which were also off, before the wipers moved of their own accord. I can move them back on the spindles to clear the screen view until I can get them sorted and pray for no rain!

[Adrian@]

Whilst the arms are off the park position the motor is live (remove the plug on the wiper motor) moving the arms leaves it live whilst it is plugged in. A@

[Penelope Stopit]

eff eff said:

They moved about 20 degrees and stayed there, odd thing is the stalk switch was off when they moved, I just saw a dim flicker from the hazards, which were also off, before the wipers moved of their own accord. I can move them back on the spindles to clear the screen view until I can get them sorted and pray for no rain!

Moving them could cause big damage to your vehicle, if the motor all of a sudden started working the incorrectly positioned could be forced down over/onto the bonnet

Remove the blades and disconnect the motor

[Penelope Stopit]

eff eff said:

The wipers stopped when I used the hazards to warn the traffic behind of a jam

eff eff said:

They moved about 20 degrees and stayed there, odd thing is the stalk switch was off when they moved, I just saw a dim flicker from the hazards, which were also off, before the wipers moved of their own accord

Really does give the impression of an earth fault

Are you able to get to the motor and check the earth and switched speed 1 and 2 supplies plus park switch supply?

Mind your hands if you can test at the motor as wiper mechanisms take no prisoners

In the past my hand was jammed in a powered up mechanism and was left like that shouting for help.....it hurt

[Adrian@]

OP, You will find that PS has selective 'hearing' when it comes to copying and pasting, NOT posting any threads where he has been pulled up for being incorrect even totally ignoring posts as he has done here with my post (those are the threads where the real information is) ...it is best you do own searching on the topic TBH. A@

[Penelope Stopit]

Adrian@ said:

OP, You will find that PS has selective 'hearing' when it comes to copying and pasting, NOT posting any threads where he has been pulled up for being incorrect even totally ignoring posts as he has done here with my post (those are the threads where the real information is) ...it is best you do own searching on the topic TBH. A@

Oh dear

Not another one

[eff eff]

Penelope Stopit said:

Really does give the impression of an earth fault

Are you able to get to the motor and check the earth and switched speed 1 and 2 supplies plus park switch supply?

Mind your hands if you can test at the motor as wiper mechanisms take no prisoners

In the past my hand was jammed in a powered up mechanism and was left like that shouting for help.....it hurt

As I can't identify which fuse relates to the wiper motor my plan to start at the motor if there's no power there I'll work backwards.
In any event I can leave the motor disconnected and move the wiper arms. Earth or some kind of cross feed does seem possible.
Maybe the wiper motor is fed from the hazard circuit???