Remote Keyless Entry/Theft Deterrent System Will Not Disarm
WARNING: This page is about a different car, the 1994 Cadillac Fleetwood. However, it is still accessible from the selected car via links, so may be relevant.
With Door Key
1) Backprobe with test light between Remote Control Door Lock Receiver/Theft Deterrent Module (RCDLR/TDM) connector terminal C13 and voltage. Turn outside left door lock cylinder with key to unlock while observing test light. If test light does not light, check for open circuit in Light Green or Black wires to left door lock switch.
2) If test light lights, turn outside right door lock cylinder with key to unlock while observing test light. If test light does not light, check for open circuit in Light Green or Black wires to right door lock switch. If test light lights, replace RCDLR/TDM.