99 grand am

It is a white wire at a black plug in the kickpanel. Lock requires a negative trigger, and unlock requires a negative trigger through a 1,500 ohm resistor. Must use relays. Must close doors to lock with a single pulse.

Have you used SPDT relays before?

If so (or if not), obtain TWO (2) SPDT 12volt 30 amp automotive relays, and wire accordingly:

UNLOCK;

85: 12 volts fused (5 amp fuse)

86: Unlock wire from r/s brain

87: to Grand am unlock wire (white wire at black plug in kickpanel -- use voltmeter to test this wire before making any connections to the relay!)

30: chassis ground --> but install a 1500 ohm (1.5kOhm) resistor between pin 30 and chassis ground

pin 30>>=========-------(((1500ohm resistor)))-------==========[chassis ground]                 ... like so.

LOCK:

85: 12 volts fused + (5 amp fuse)

86: Lock wire from r/s brain

87: to lock wire of grand am (same as UNLOCK wire above)

30: chassis ground (no resistor needed)

Lemme know if this makes sense, good luck.