So the blower is staying on?

I think (no wiring diagram at hand) that the blower is electronically controlled by the blower controller. It responds to a 1-6v signal from the pushbutton controller. It is hooked to battery power though and can turn the blower on if faulty.

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Steve Brotherton
Continental Imports
Gainesville FL
Bosch Master, ASE Master, L1
33 years MB technician