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2013 Mustang Auto - AC stops turning on sometimes?

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My AC does not turn on all the time. It will turn on once the key is in the ignition. Sometimes it turns on when remote started. I do make sure to leave the AC on before turning the vehicle off. Any ideas? Worked well in the past. Maybe the latest updates?
asked Oct 11, 2017 in Ford by Christopher VanHoose (180 points)
edited Oct 11, 2017 by Christopher VanHoose

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You mention it worked in the past, have you done any change to the installation ?

Is the vehicle blowing hot air or no air at all ?
answered Oct 11, 2017 by Mathieu Bertrand Collin (62,060 points)
selected Oct 12, 2017 by Christopher VanHoose
Only change has been updates to the evo over the past 3 years. Blows no air at all untill key is in.
commented Oct 11, 2017 by Christopher VanHoose (180 points)
EVOALL or EVOONE ? With or without t-harness ?
commented Oct 11, 2017 by Mathieu Bertrand Collin (62,060 points)
EVOALL with t harness.
commented Oct 11, 2017 by Christopher VanHoose (180 points)
Definitly sounds like the accessory is not being powered by the t-harness. The same wire powers both ignition and accessory so one can not work and not the other. Inspect the t-harness make sure no pins are crooked or damaged.

Meter the purple/green at the ignition harness and see if it has 12v when remote started.
commented Oct 11, 2017 by Mathieu Bertrand Collin (62,060 points)
confirmed 12v. after inspection of the harness, the ac is turning on with remote start. I must have a faulty connection.

I appreciate your help. Thank you.
commented Oct 12, 2017 by Christopher VanHoose (180 points)

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