Got2Gnow -

If you are persistant on utilizing 2 DPDT switches for the wiper motor do it like this:

Switch One is for On - Off or On - Park Only.

This switch when in the On position will send a power feed to the Low - High Speed switch

This switch when in the Off or Park position will remove power feed from the Low - High Speed switch and will ground the motor to send it to Park.

For the On Off or On Park switch use the normally open contact to feed power to the common terminal of the Low High Speed Switch. And use the normally closed contact for the Park position.

For the Low High switch use the normally closed for the Low speed and the normally open for the High speed.

There I think we have this problem solved now.

No extra relays required (If the switch can handle the power of course), No possiblity of the motor being in Low and High at the same time and better even no possibility of the motor being in Park or High at the same time also.

Let me know what you think of that design.

Good luck and keep us posted.