09 f 150 headed seats w/python 5702p

Im having a customer tomorrow for a Alarm/Remote start on his 2009 Ford F-150. First time doing headed seats to work with remote start. The remote start is a python 5702P. What is the process of finding or wiring the headed seats to work with the remote start, so it would function when the remote start (starts).

Thanks in advance Cesar..

If you have the heated seats turned on, then turn the key off and then back on, are the seats on or off?

How can i find the heated seats wire? for the 09 ford f150

Yes i have a volt meter.Will the wire in back of the ac/heater control work? Since the heated seats button is atached to the control. Iknow i have to use a switch so he can switch it off in the summer. Im also going to use a relay and the (-)GWR wire from remote start..

How can i test the wire? Could it be a + ,or -.

The wire could be a positive or a ground.  i have no idea,  I would feel safer using the switch itself.  If you use the wire on the back of the switch, we can just mock what the switch does, and not have to worry about taking out an espensive contol module.  If you get it at the AC control unit, there is a chance we could burn up a module. 

To find the wire, attach your black meter lead to a known good ground, place the meter on the DC volts selection.  Red lead on a wire on back of the switch.  Press the switch and look for a change in voltage on the meter.  Repeat for each wire.  You are looking for voltage only when you are pressing the switch.  If you find a wire that changes when you press the switch, yet it remains hot after releasing the switch, that is probably the Indicator light to tell you the switch is on.  Check every wire on back of the switch.  If no luck you will need to attach the red meter lead to a known good 12 volt source;  Then place the black lead on one of the wires.  Press the switch, and look for a different reading only while pushing the switch.  Repeat for the rest of the wires.  Let me know what you find out.