If a customer purchases 2015-2017 Ford Expedition 4″ To 8″ Sync 3 Touchscreen Upgrade and they have no AC, no air movement after the install. This is due to the customer not tapping into the correct orange wire with white stripe. The install requires the new HVAC module to have its own harness which has a posi tap that needs to be made for an ignition wire. The ignition wire is below the steering wheel behind the knee bolster. If AC doesn't work once install is done then customer tapped into the wrong ignition wire.
Harness for the HVAC module.
Wire to posi tap into under the steering wheel behind the knee bolster.