I've checked and metered the wiring to the switch and all tested just fine. As I meter the tree switches, all test just fine. The "-" part of the switch tested bad at the point under the control unit which is why I replaced the tree. All fuses are good, but I am nearly convinced it's an el...

Thanks. I NEVER hear the thing running at all and the cruise doesn't even try to engage. I'm getting stumped over this one. New brake cut-off switch, new control unit, new switch tree, still nothing!

I have run the jumpers under the control module and the pump starts up jsut fine. I pulled the pump out and inspected the hoses, and all seems fine. When does the vacuum pump start up? When the car runs or when asked to by the cruise?

I have a '93 850 GLT and the cruise does not work. I have replaced the brake vacuum cut-off switch, the control module, the switch tree and still nothing. I don't even hear the vacuum pump working. I did run some tests and could make the vacuum pump work with jumper wires placed on the posts under t...

Do you still have these? Does the vent servo (drivers side) come with the gear? Reply to this or email [email protected]
Thanks

Sorry, should have included that. It is an electronic system with variable fan speed.

I bought a 93 850 GTL non-turbo with no vent door actuators on either side of the heater box. Are the two different? I've found two kinds for sale and I'm not sure which one(s) to buy. Any help at all would be greatly appreciated!