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Service Info shows the following.
1989 Pontiac Grand Prix Page 8A-132-4 1990 Pontiac Grand Prix Page 8A-132-7
Please update your copies of the Service Manuals.
TROUBLESHOOTING HINTS
Try the following checke before doing the System Diagnosis.
1. Check LUGGAGE COMPARTMENT Fuse.
2. Always check terminal contact before replacing any component.
3. If door locks operate from the transmitter, but not form the door lock switches, check continuity of door lock switches and associated wiring for an open or a short. Repair/replace as necessary.
4. If a second transmitter is available, try it. If it works, change the batteries in the first transmitter and try it again, If it still doesn't work, it is defective.
5. Check portable transmitter battery terminals. They should be clean and make good contact with the battery.
6. If in doubt as to the condition of the transmitter batteries, replace them with new ones. Measuring battery voltage with a DVOM may give misleading results.
KEYLESS ENTRY MODULE PROGRAMMING PROCEDURE
Do the following procedure whenever the Dats Encoder connector is grounded, the Keyless Entry Module is replaced, the portable transmitter is replaced or a second transmitter is added.
1. Jumper the Data Encoder connector to ground. (all power door locks will lock and unlock)
2. Operate transmitter by pressing a single button once. (all power door locks will lock and unlock)
3. To program for a second portable transmitter, operate second transmitter by pressing a single button once. (all power door locks will lock and unlock)
4. Disconnect Data Encoder Jumper Connector.
5. Verify that the portable transmitter(s) operate door locks and luggage conpartment release.
TROUBLESHOOTING HINTS
Try the following checks before doing the System Diagnosis.
1. Check LUGGAGE COMPARTMENT Fuse.
2. Always check terminal contact before replacing any component.
3. If door locks operate from the transmitter, but not form the door lock switches, check continuity of door lock switches and associated wiring for an open or a short. Repair/replace as necessary.
4. If a second transmitter is available, try it. If it works, change the batteries in the first transmitter and try it again, If it still doesn't work, it is defective.
5. Check portable transmitter battery terminals. They should be clean and make good contact with the battery.
6. If in doubt as to the condition of the transmitter batteries, replace them with new ones. Measuring battery voltage with a DVOM may give misleading results.
KEYLESS ENTRY MODULE PROGRAMMING PROCEDURE
Do the following procedure whenever the Date Encoder connector is grounded, the Keyless Entry Module is replaced, the portable transmitter is replaced or a second transmitter is added.
1. Jumper the Data Encoder connector to ground. (all power door locks will lock and unlock)
2. Operate transmitter by pressing a single button once. (all power door locks will lock and unlock)
3. To program for a second portable transmitter, operate second transmitter by pressing a single button once. (all power door locks will lock and unlock)
4. Disconnect Data Encoder Jumper Connector.
5. Verify that the portable transmitter(s) operate door locks and luggage conpartment release.
Originally Posted by Sven The Sexman
