Intermotive A-CVC501/502 HVAC & Fast Idle CAN Vehicle Controller for Ford F250-550Condition:* New surplus stock, no OEM packaging. As picturedAdditional Notes:* Compatible Vehicles: 2011-2016 Ford F250-550 2017-2019 Ford F250-550 2020-2021 Ford F250-F550 6.2L & 6.8L Gas Engines Only* The CVC501/502 are designed to activate the OEM air conditioning system based on aftermarket equipmentrequests (typically rear auxiliary AC systems), even when the front AC is turned off. * This allows the rear AC on ambulances and transit buses to operate even if the front AC is off. The CVC501/502 monitors two Rear AC Request inputs: one active low (ground) and one active high (12V). * When the engine is running and either of these inputs are active, the CVC501/502 will activate the OEM AC system to provide air conditioning for the rear. The OEM AC system monitors pressures and temperatures as originally designed.* The CVC501/502 also monitors an active high (12V) Front AC Off Request input* The CVC501/502 also provides an auxiliary fan control output which may be used if desired to control fans on a supplementary condenser system.Intermotive A-CVC501/502