Front Windscreen Wiper's -- Problem

Since purchasing my Disco (1993 model), the windscreen wipers have not functioned 100 %, ie. they don't return automatically to the 'park' position and the intermittent wipe does not work.
I was told that this was probably due to a faulty motor. I replaced the motor this weekend, (albeit with a used one), but the fault still remains.
Anybody out there got the answer ?
Somebody had the same problem ?

I would be grateful for any assistance.

This might be barking entirely up the wrong tree but bear with me...I know next to nothing about Discoveries...

On Rover 800's (late Mk1's and all Mk2's) you can program the wipers as almost all the accessories are run off a single CCU. Can't remember exactly what you can program but I presume the parked position would be amongst these features.

From what I've seen of having a Discovery (for less than a week) it's a bit of a parts bin special and has some bits from R800's (most notably the 2.0 MPi engine and the facia vents).

Does anyone know if Discovery's shared this CCU..?

Just a random thought and not to be taken as an answer...!

Malcolm

just to let u know i have the same problem if u find out what it is let me know thanks

Have had the opportunity to pock around our newly acquired 200TDi.

It doesn't have a CCU; although the 300TDi does according to my Haynes Book of Lies - sorry..."manual" - got no idea if the 300TDi's CCU controls the various functions on the wipers though.

Now - presuming you have a 200TDi or pre 95 V8...

Looking at the wiring diagrams in the Haynes manual I can see there is a "Park Switch" in the motor itself (presumably controlling the position of the wipers when parked by means of a switch that is activated by some kind of cam or lever?).

There is also a solenoid and resistor/switch asembly in the front wiper relay. Maybe that somehow acts like a capacitor discharge unit to give intermittent wipe...I'd guess the "capacitor" holds enough juice to open the relay (thus energising the wiper motor) for one sweep of the wipers; the more slowly the capacitor is charged up via the resistor, the longer the delay?

I'd suggest that you should try substituting a know good relay and see if that solves the intermittent wiper issue. Also have a look at the motor mechanism and see if you can work out how the "Park Switch" works...might just need some WD40 if you're really lucky!! The microswitch controlling the stop position on my first Rover 800's sunroof was fine after a burst of WD40...

Sorry - not the most affirmative response and theres a fair bit of guesswork in my response, but in the absence of anyone else knowing an answer I hope that points you in the right direction (or at least towards a solution!).

Obviously if you find an answer that doesn't involve replacing expensive components wholesale...post it up here please!!

Malcolm

One other thing; the stalks controlling the wipers on 200TDi's are exactly the same as Maestro's, Montego's, Metro's and Sherpa's of a similar age.

Therefore it is possible (probable?) the relays are the same unit...

Just be careful if hunting in a scrapyard as not all models of the above had an intermittent function...check the wiper stalk for the intermittent control.

Malcolm