kst8engineer

iTrader: (6)

In my swap, I'm using the engine/harness/PCM from a '99 T/A. For a small amount of added security, I'd like to leave VATS in the PCM and run a VATS bypass box that could be removed for security.

To do this, will I need to isntall the body control module (BCM), or can it be done without that?

Thanks

69 Ghost

I don't think so. I was looking into the BCM also and the VATS system talks to the BCM. It also is the gateway to the passkey -the resistor in the key. You can bypass it and put in a kill switch though and the car will not even turn over.

kst8engineer

iTrader: (6)

So if VATS can be used without the BCM, what PCM terminal to I need to supply with a signal to make VATS happy? Does the VATS bypass box just need to feed into this PCM terminal and not even use the BCM?

69LT1Bird

iTrader: (1)

Do you have the steering column? An aftermarket security system may be less hassle.

ls1nova71

iTrader: (4)

You don't need the BCM. The VATS bypass box will have three wires, a ground, ignition on power, and the third wire goes to the PCM, (dark blue wire, #30 on the red PCM connector). I put a 3 terminal plug on mine so I could remove it too, been working for years.

kst8engineer

iTrader: (6)

Great, thanks for the detailed response!