Packing up for a holiday trip to California today but I took a short break from packing to try to figure out how my locker switch works so I could remove it and integrate it with my power distribution module, if possible.
Here is what I came up with:
Pin 1: Hot
Pin 2: Hot when in low range
Pin 3: Ground
Pin 4: 7v when no locks requested, .5v when any locks are requested
Pin 5: Jumpered to Pin 1, Hot
Pin 6: Ground
Pin 7: Unused
Pin 8: 7v when no locks engaged, .5v when any locks engaged
Pin 9: Hot when center lock requested
Pin 10: Hot when rear lock requested
Pin 11: Hot when front lock requested
Pin 12: Hot when center lock disengaged, .5v when engaged
Pin 13: Hot when rear lock disengaged, .5v when engaged
Pin 14: Hot when front lock disengaged, .5v when engaged
So overall this should be easy to emulate with my pdm, the one bit I am missing right now is something that can output .5v or 7v to signal if the lockers are engaged or requested. Not sure how to do that at the moment. If it was just 7v I could do a 12v to 7v step down converter, but the fact that I need to switch between two voltages makes it a little trickier. I'm sure there is a component out there that does what I need, just don't know what it is called at the moment to search for it.
The voltages when the lockers are engaged vs disengaged is a bit surprising to me as well, I didn't expect the 12v to .5v high/low type signaling but then again I have zero electrical background so I may be misunderstanding the system.