Windscreen wiper relay location

It still is in most cases.

Non parking wipers are almost always the park switch contact in the wiper mechanism. This includes wipers in older LRs.

Modern vehicles with independent wiper spindles use stepper motors to drive the wipers independently of each other. These wipers have position sensors in the spindles, so the BCU knows where the wipers are in there sweep. They also often have additional sensors under the parked position of the blades, so the BCU tell if the blades have been moved by other means, like when the car is being cleaned.[/QUOTE]

So not complex at all then, with yet more unnecessary carp! Old skool, more reliable, easier and cheapr to fix. Can't have that then!

Stanleysteamer said:

So not complex at all then, with yet more unnecessary carp! Old skool, more reliable, easier and cheapr to fix. Can't have that then!

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Definitely. Old school is easy to fix at home. New school isn't an easy DIY repair.

Stanleysteamer said:

As I said, the switch in in the mechanism, under the point where the blades are turned by the arm. Not in the motor, nowhere else, exactly as mentioned in my first post.

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Nodge68 said:

Modern vehicles with independent wiper spindles use stepper motors to drive the wipers independently of each other. These wipers have position sensors in the spindles, so the BCU knows where the wipers are in there sweep. They also often have additional sensors under the parked position of the blades, so the BCU tell if the blades have been moved by other means,

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WRONG

On Discos(1, 2, 3, 4) the park switch IS IN THE MOTOR... the BCU is involved only in the intermittent operation, for example on fast speed or flick no electronics are involved only the stalk and the motor, not even a relay, if here were position sensors there should be a separate circuit for theyr's input and no such thing on a D2 only one plug (C0030)

examples for the D2 which i know the best

sierrafery said:

WRONG

On Discos(1, 2, 3, 4) the park switch IS IN THE MOTOR... the BCU is involved only in the intermittent operation, for example on fast speed or flick no electronics are involved only the stalk and the motor, not even a relay, if here were position sensors there should be a separate circuit for theyr's input and no such thing on a D2 only one plug (C0030)

examples for the D2 which i know the best

View attachment 200887

View attachment 200884

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Not wrong.
MODERN. as in not in 30 year old LR stuff use stepper motors, where independent wiper (LR use linkages i.e. NOT independent) arms (read what I said!!) are used. Almost any vehicle with linkages between the arms have some kind of park switch in the motor, or right near by. The BCU, CCU or flick wipe simply moves the motor sufficient enough for the park switch to take over the rest of the operating motion, until the park position is reached again.

Sorry ... i thought it's about Discovery in this section of the forum ...and IMO D4's which have park switch in the motors as well are modern enough

sierrafery said:

Sorry ... i thought it's about Discovery in this section of the forum

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It is. I was using it as an example of how complicated modern stuff is getting.

sierrafery said:

IMO D4's which have park switch in the motors as well are modern enough

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The wipers in the D4 are using wiper technology, that is almost as old as the wiper itself, with the park switch in the motor.

Nodge68 said:

MODERN. as in not in 30 year old LR stuff

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RR Velar 2020 is modern enough ?

Stanleysteamer said:

In the old days, the park switch used to be part of the windscreen wiper mechanism. You put the switch to "off" and current continued to flow to the motor until the wiper moved to the position where park would happen. Then the mechanism would cut the current and the wiper blade would remain in that postion until the motor was energised by the switch being put into one of the various "on" positions. So in effect there were two power feeds to the mechanism that got switched from one to the other by the switch. The mechanism contained its own off switch.
I appreciate that this may well have changed, but at the very least there has to be an electrical connection between the mechanism and the power to tell the power to cease, if you see what I mean.

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Stanleysteamer said:

As I said, the switch in in the mechanism, under the point where the blades are turned by the arm. Not in the motor, nowhere else, exactly as mentioned in my first post.

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As I said all along, the switch is not IN the motor, and the diagrams at both post #23 and pos t#27 show that the switch is attached to the motor, it actuates the motor, or in the case of the park switch it cuts the power to the motor at the point where the blades come to the point where they need the power cut in order to stop moving. The switch is not part of the motor, it is part of the mechanism. It is a mechanical switch, NOT a relay, nothing else actuated electrically. So @sierrafery , when you say the switch is IN the motor, no sorry, and you know I never argue with you, usually, but it IS in the mechanism, not IN the motor. It even has its own separate part number, S293, if the diagram is to be believed.

For once, I actually do know what I am talking about when it comes to electrical wipers. Due to kit car building, I have modified wipers to work from outside to the middle rather than left-right, I have also made a two wiper system into a three wiper system as many kit cars have very low windscreens. I have made extra tubing using Bundy tubing flaring the ends where necessary. The motor is connected to the wiper spindle and the switch is right there. Actuated by the spindle moving to the correct position, when power is cut at the switch on the steering column.

Look at this and Zoom in on the picture you'll see the electrical connection to the motor. The motor is off to the right.
https://rimmerbros.com/Item--i-DKD100620
and here is the switch https://rimmerbros.com/Item--i-LR05...MIktSSutHZ5wIVCbrtCh24SQHREAQYAiABEgKPTvD_BwE

and here is how p!ss easy it is to fix, (on a Defender). The vid clearly shows the plastic bit that rides on the wheel which can just be seen ATTACHED to the mechanism. it's the same on a Disco, you jjust have to get to the bit you need to do.

Really don't think i can make it clearer.

Stanleysteamer said:

The switch is not part of the motor, it is part of the mechanism.

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OK, maybe it's just about semantics... for me the "motor" means that whole unit cos that's how it's named as spare part and that loom with the connector is part of that motor for me... AFAIK there is no park switch available for D2 like for defender only the whole motor, in my english ''contains" means that it's part of it or in it and that's how it's described in RAVE: "The dc motor contains two permanent magnets, three brushes and a park switch"

in my mind the ''mechanism" is the metal linkage (nr10) to which the motor nr2 (which contains the park switch) is attached http://new.lrcat.com/#!/1232/36532/36627/2779

for Defender the switch appears as separate item(nr 3) which is not the case for Disco http://new.lrcat.com/#!/1228/10541/11202/884/11356

sierrafery said:

OK, maybe it's just about semantics... for me the "motor" means that whole unit cos that's how it's named as spare part and that loom with the connector is part of that motor for me... AFAIK there is no park switch available for D2 like for defender only the whole motor, in my english ''contains" means that it's part of it or in it and that's how it's described in RAVE: "The dc motor contains two permanent magnets, three brushes and a park switch"

in my mind the ''mechanism" is the metal linkage (nr10) to which the motor nr2 (which contains the park switch) is attached http://new.lrcat.com/#!/1232/36532/36627/2779

for Defender the switch appears as separate item(nr 3) which is not the case for Disco http://new.lrcat.com/#!/1228/10541/11202/884/11356

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OK. Looks like Rimmer led me up the garden path and that the switch they sell IS only for the Defender etc.
So, OP sorry about that.
However, if you cannot take the wiper apart, find the park switch and fix it, which would be a shame, there are wiper motors at breakers yards and all over the Bay, however if you want a new one, or just to pinch the parlk switch out of one, here is a new one which ain't too expensive. Not LR but you only want the park switch!
https://www.mm-4x4.com/discovery-2---windscreen-wiper-motor-10565-p.asp
Best of luck but I BET you'll be able to take it apart and fix it, they ain't too complex. you may have to make a bit, but as I said...Bext of luck.

Stanleysteamer said:

So, OP sorry about that.
However, if you cannot take the wiper apart, find the park switch and fix it,

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The OP was last seen here in Jun 1, 2011 so i doubt he will be bothered

sierrafery said:

The OP was last seen here in Jun 1, 2011 so i doubt he will be bothered

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WTF!? So why did I get a notification?
I must be losing it!

I see now, post #13!

Though it was o good discussion and i can reformulate my satement to be more accurate so i admit that when i said the park switch is IN the motor i wasnt 100% correct cos it's better to say it's ON the motor(when it comes to Disco off course) but to change only the switch on a Disco wiper motor it's wires must be cut and resoldered

Agreed! And I notice our "friend" from Bangor, Maine has "Bangored" off and not returned after his original short, and quite curt, post!
I'm sure he'll find one now if he is out there and reading this stuff.

Funny that even the manual said "contained" see https://dictionary.cambridge.org/dictionary/english/contain
to understand why I was mystified. To be within the motor it would have to sit inside the casing along with the armature, brushes etc.
To be a part of it, apart from being what is within it, it would have to be inside the casing or at least partly in it, like the spindle. Put it this way, the motor can only work if all its parts are there and working. If the park switch is not working, it doesn't stop the motor working, cos it ain't part of it.

To me the proper description would have to be "attached" to the motor, or even more accurately, "attached to the mechanism driven by the motor".
Someone with autism might otherwise start digging around inside the casing trying to find it!

I am pedantic cos I used to be a languages teacher ....... and also because I have a slight tendency to pedantry anyway!

Well I've gone for a new relay as an elimination of possibilities. As posted earlier, I've fitted a new wiper motor and park switch, and now I cant switch the wipers off. Well only with the ignition switch. So proceeding to fit the new relay, clearly I thought, one of the three behind the gear stick below the fuse board. But NO! its neither of those, so can someone tell me where it is ? This is on a 1997 300Tdi defender. Thanks.

Even though this is the Discovery forum i can tell you that the thing they name "delay ECU" is what othes are naming "relay", that C303

HA HA HA, Sorry about being on the wrong forum Sierrafery, but thanks for your help. I located the relay, changed it, and Hey Ho ! Nothing changed, the wipers still wont turn off. Thats all the simple solutions taken care of to no avail. Suppose I'm gonna have to dig deeper. Haven't a clue what to try next. Any ides anyone. I might just try by getting on the correct forum. That'd be a good start, but many thanks once again sierrafery, cheers.

GET IT DONE said:

I located the relay, changed it, and Hey Ho

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Did you change it with the correct one with the 6 terminals(AMR2341)? if yes unplug the wiper switch's connector(C278) when the wiper doesnt stop and if it stops then the switch is stuck closed or a short on that circuit an you need a new switch