Hi guys,

Anyone know how to test the wiper motor's park switch for correct functionality?

cheers.

multi meter

I would take it apart, mine had all of the copper thingys shaking around loose in there.

Also for what they cost on ebay you could just try a cheap one.

Turn your wipers off and they should stop.

If they don't take the cover off the motor, give it a good squirt of WD40 and that usually cures it.

For some unknown reason, the switch has a tendency to collect crap between the contacts and the motor carries on going.

Sorted. On the 2003 Defender TD5, if you whip the plug off the wiper motor so you're looking at the mating end of the plug, you'll see 5 connectors: two vertical ones on each side and one horizontal one on top (that's the ground). Snip the two vertical ones on the left and you take the park switch out of the the circuit. When I did this, the wipers started working stably again and no more blown fuses. I've left it like that, so on the stalk I've now got "off", "normal-on" and "fast-on" functions. I don't need anything beyond that so will not be bothering with fitting a new park switch (which will doubtless only go wrong again at some future time).