Strange wiper motor behaviour on my TD5

Hi, having used one of the guides on here for removing the dash (thanks!) my dying wiper motor has now sprung back to life. Heres the background:
2 weeks ago my wipers seemed VERY slow when I used them for 1 pass to clear a few drops of rain, I never thought anything more of it. A week later and with no rain I hadn't any reason to use them and when I suddenly had to they made 1 pass, very laboured, and the motor came to a stop about 20% from the end of it's cycle, it didn't 'park' there, it 'died' there.
So I got home and tried again, very laboured and didn't make the full pass. The next attempt it barely moved. I could still hear the relay clicking and telling the motor but it had no 'juice'.
Is it the case that it if was the parking switch then the wipers would still work 'ok', but just park in the wrong place?
So anyways, I ordered a new motor last week and it will arrive in the next day or so. Is it best for me to just replace the original motor and park switch (which the new motor comes with) or could there be something else that caused this problem? Thanks.

I've been at war with my TD5 wipers since December 2013 and have replaced a number of things including the stalk switch, the motor itself and the rack and wheelboxes. The biggest improvement however came with replacing the wiper relay. Well, they call it a relay but it is more of a control unit with its own little printed circuit board.

disconnect motor from wire rack pull on rack wipers should move relatively easily if not rack ,spindles etc are stiff and need looking at ,if they do a new motors needed

jamesmartin said:

disconnect motor from wire rack pull on rack wipers should move relatively easily if not rack ,spindles etc are stiff and need looking at ,if they do a new motors needed

Click to expand...

Thanks,
Is it fairly easy to remove the motor from the wire rack? It looks a similar set up to my steering for my outboard engine on my boat, except that it has a rubber sheath of sorts over it. Does this just pull off? Here is where I am at, with the motor arriving tomorrow hopefully, and the wipers now magically working again. I don't know if it's just my imagination, but they don't seem to have the power they had before and the motor sounds pretty laboured.

pull sheath up undo nut undo motor strap ,twist motor round undo the small bolts holding tin cover, rack will pull out from casing and crank

jamesmartin said:

pull sheath up undo nut undo motor strap ,twist motor round undo the small bolts holding tin cover, rack will pull out from casing and crank

Click to expand...

Excellent, thanks very much!
I'll let you know how I get on.

Well, I got my motor late yesterday and waited until this morning to fit.
A bit fiddly but I got there in the end.
Turned it on to test and all was fine, the only slight issue was the wipers were parking a bit higher than usual. So I decided to try the park switch from the old motor to see if that made any difference. Oh boy, what have I done!
Now the wipers stay on at all times, even when going back to the new park switch. I've tried pulling the battery power, pulling the relay then reinserting it, but as soon as I turn the key in the ignition, the wipers start moving even when the stick is at off.
Any ideas to what is causing this?
Should I replace the replay?
I think I know what has caused this, I switched the park switches over when the relay hadnt completed a full cycle and now it's in some kind of perpetual mode! Argghhh
Any tips?

Okay, so here is where I am.
I've plugged in the old wiper motor and the old park switch and the same thing is happening, motor keeps turning even when the stick is at off. When stick is pushed to fast mode, it will make motor faster.
So the same behaviour is being shown by old and new motors AND old and new parking switches.
Which means that either both park switches are knackered (they both worked fine earlier today) or the relay has blown or there is some miswiring going on.

Ignore me.
What an idiot.
I was operating the motor with the park switch not nestled in its wee slot, so of course it wouldn't stop!!!