The Park/Neutral switch: it takes a voltage, probably 12v, from the ECM (pin B10) to the P/N switch (orange/black wire). When the transmission is in Park or Neutral, it connects the B10 line to ground (black/white wire) and the ECM sees the circuit closed (and applies IAC, which isn't important for this thread).
Presumably, this only happens when the car is on. I want to use the P/N switch, but I need it to work in a car-off condition as well. In other words, car on or off, keys in or out, I want to be able to determine if the transmission is in P/N.
In a car off condition, I would need to splice in a 12v source to the B10 line - I think that's pretty straightforward. But when the car is on, wouldn't that spliced in 12v keep the circuit closed, thereby fooling the computer to think the transmission was *always* in P/N? Obviously not a desirable condition. Can someone think of an elegant solution to this? I'm clearly not an electrician, don't be too hard on me
Or maybe there is an alternative to using the B10 line? The functionality will be tripping a relay that I only want active in P/N.
Presumably, this only happens when the car is on. I want to use the P/N switch, but I need it to work in a car-off condition as well. In other words, car on or off, keys in or out, I want to be able to determine if the transmission is in P/N.
In a car off condition, I would need to splice in a 12v source to the B10 line - I think that's pretty straightforward. But when the car is on, wouldn't that spliced in 12v keep the circuit closed, thereby fooling the computer to think the transmission was *always* in P/N? Obviously not a desirable condition. Can someone think of an elegant solution to this? I'm clearly not an electrician, don't be too hard on me
Or maybe there is an alternative to using the B10 line? The functionality will be tripping a relay that I only want active in P/N.
