E 350 1 Ton Van V10-6.8L VIN S (1997)
Blower Motor Relay: Description and Operation
The blower motor relay located in the power distribution box is an ISO type relay. When this relay is energized, by selecting an A/C-heater function
selector switch position other than OFF, power is provided from the blower motor fuse (50 A) to the blower motor.
