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International Automotive Technicians Network
Re: 2018 Ford F150 Lariat Blower motor
Posted to Technical Tips Forum on 3/17/2023

If you would have scoped both the control signal wire from the FCIM to the blower speed control module and the blower motor current on the blower motor battery supply circuit you would have found the problem right away.

When you change the speed of the blowe... Login to read more.