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Re: Mercedes R350 Cooling fan turning on with vehicle off
Posted to Technical Discussion Forum on 2/28/2017 4 Replies

HI Gary,

Your yellow wire is PWM from the ME to control fan speed. The fuse 101 is terminal 87 (Switch B+) and should be 0vdc with the key off. Relay kD controls terminal 87 thus power for fuse 101,104,105. I've got to wonder if the return spring in the rela... Login to read more.

4 Replies Received (View Replies)