There is a switch built into the key door lock. When it is unlocked, it grounds the TDM at pin H. Only turning the key does this, sliding the lock lever or using the power door lock switch won't.
I don't know if your year has the same Theft Deterent Module that the 85 has but it might be similar. What I did was connect a diode (1N4001) to the unlock trigger on the keyless entry and to the disarm input on th TDM (lt green wire - 'H' on connector) A shop manual would help you find the...
I have six brand new 2 wire retainers #12043158. I decided to route my wires differently so I never used them. If you would like to buy them, send an email to wn@csi.com.
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