Join Date: Dec 2004
Location: Lakewood, Colorado
I've never dealt with that particular switch but there should be three wires: 1 for power, 1 for "low" and 1 for "high". There will be no ground on the switch - the switch only deals with "positive" power. The blower motor is grounded.
Yes, you would use the resistance function on your multimeter. You should see zero or close to it when the switch makes contact, infinity when not.
I don't know which is which on a disassembled switch but shouldn't be hard to figure out unless the switch is completely bad. One lead goes on the power, the other on one of the other two and toggle the switch. So just hook up the leads and toggle the switch. If you get nothing move one of the leads. There are only 3 possible combinations. At that point you should see a contact unless the switch is bad.
Do you have Papajam's electrical diagram? If not PM him and ask. Here's the switch on my '88 diagram. Pink is power, the two others to the blower motor. Obviously if it's in pieces it's not all that helpful.....:
1990 Spider Veloce
Last edited by GV27; 06-28-2017 at 08:14 AM.