Right, been trying to get my head round this and got through 2 park switches in the process!

If wiper switch is on speed 1, a circuit is made though the low speed part of the wiper motor.

If wiper switch is on speed 2, a circuit is made through high speed part of wiper.

If wiper switch is off, the switch links the return wire from the "park" terminal on the park switch to the speed 1 circuit on wiper.

The circuit on park will go from the seperate live on the park switch, through the actual park switch itself, back to the dash switch, back up the 1st speed wire to the motor. This circuit will only stay live until the microswitch falls into the wiper gear and cuts it.

Let me know if that sounds right, so I don't torture switch number 3 lol

Thanks

Are you using the standard Sierra stalks??

Nah just the normal lucas dash switch.

Shaun

Ah ok. Well i'll point you in the direction of a Tiger wiring diagram that may help you work it out anyway.

U2U on its way

Certainly your understanding of how it works is correct.

ahh sorted it now!

I had it wired up to a battery on my bench, the problem was that i joined the low speed and park wires together at the beginning, to save me doing it when they should be joined. It seems the park switches will only survived when the motor is either on OR the park circuit activated NOT both at same time!!

Thanks for your help