Quote:
Originally Posted by DeliriousClam
... Now I just want to make sure it rests at ~12 volts and drops to 0 when the hatch release is pressed. If that's the case, it seriously might just need one wire spliced into that gray wire and the other wire attached to ground. ...
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You may need a current limiting resistor. FSM will have wiring diagram; you should be able to determine if resistor is necessary there.
See also:
https://duckduckgo.com/?q=sinking+input