THEFT DETERRENT ALARMS INTERMITT./DISCHARGED BATTERY

VEHICLES AFFECTED: 1989 CADILLAC C

Some 1989 Sedan DeVilles and four-door Fleetwoods may exhibit a condition of false theft alarm or discharged battery. The condition may appear worse in humid weather and may begin to occur after door adjustments have been performed.

This condition may be caused by a misadjusted door jamb switch. If misadjusted, the jamb switch theft contacts can short together in high humidity or as the body settles. (The theft contacts can short without turning on the interior lamp because the interior lamp contacts require a fully-closed switch.) If the theft system is armed when the contacts short, the result will be a false theft alarm. If the theft system is not armed, the security telltale, could flash causing a discharged battery.

To diagnose the condition, try closing each of the four doors several times while watching the security indicator. If the security indicator continues to flash with a closed door, the jamb switch on that door is misadjusted.

To repair the condition, remove the switch and install one washer, P/N 22521054, between each jamb switch and the door jamb surface on all four doors. The washer is a 3mm thick flat spacer washer with a corrosion resistant coating. Four-door vehicles built after VIN 219497 have a washer installed on each switch.

General Motors bulletins are intended for use by professional technicians, not a "do-it-yourselfer". They are written to inform those technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions and know-how to do a job properly and safely. If a condition is described, do not assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See a General Motors dealer servicing your brand of General Motors vehicle for information on whether your vehicle may benefit from the information.