The four button remote with keyless entry and remote start on my 2001 buick lesabre has stoped working. The keyless and trunk and horn functions all still work fine just the remote start has quit working. I suspect it is a programming problem but am not sure. The four button remote is produced by audio-vox

No Vince

The most likely is that someone tried to break into it and it is the alarm. Horn pads don't self activate. I guess it might be a faulty relay?

https://www.google.com/search?q=2000+Buick+Century+Custom+horn+went+off+on+its+own

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Reportedly, no.

https://northcoastkeyless.com/2001-buick-lesabre-keyless-entry-remote-fob-programming-instructions

If it has the electric trunk release, the button could be in the glove box.
Otherwise you may have to remove the back seat to gain entry to the trunk.

Have you had it checked to see if DTC'S - diagnostic trouble codes stored in the BCM - body control module ? That's the first thing you should have done . Dealer or other independent reair shop that has a factory or professional type scan tool . Auto part stores can't pull these codes .
The keyless entry system has the following main components:
• The transmitters
• The body control module (BCM)
• The remote control door lock receiver (RCDLR)--When you press a button on the transmitter, the transmitter sends a signal to the RCDLR. The RCDLR receives the signal and sends a serial data message requesting the appropriate function from the BCM.
• Keyless Entry Antenna which is a coaxial cable that runs from the RCDLR to the back glass. It attaches with a 9 volt battery style connection to a grid on the back glass, this style antenna is used to increase range and performance for Keyless Entry and Remote Vehicle Start systems .

Trunk reless relay ! Which year is right ? at the top is shows 1992 Buick . An it also has 2005 ? Which is it ?

i honestly am guessing,can you turn key to the left from vertical or right from vertical,if so one (left or right)is to lock trunk so you can give your keys to valet parkers....

The keyless entry matches to the module for it that is mounted under the dash. It may have gone bad since your remote will not function. Of course it could be your remote as well that went bad

stand at the vehicle and push and hold the lock and unlock buttons till the horn chirps to resync the key fob

SECTION 501-14B: Keyless Entry/Computer Operated Locks 1999 Town Car Workshop Manual GENERAL PROCEDURES Programming —Keyless Entry Keypad Code

1. Enter the permanent factory keyless entry keypad code.

1. Press the 1/2 button within five seconds to activate the programming mode. Holding the 1/2 button for more than two seconds will erase all stored customer codes. The existing codes do not need to be erased to program new codes.

1. Enter the new five-digit keyless entry keypad code.

1. To associate the new code with personality positions 1, 2 or 3, press the 1/2 button within 5 seconds of entering the 5th digit of the new code for position 1 or 3/4 button for position 2 or 5/6 for position 3. The door locks will lock and unlock confirming the new code is programmed.

1. If another code is to be programmed, begin entering the code within 5 seconds of the last button pressed.

1. After all new keyless entry codes are programmed:
   • Press keyless entry keypad buttons 7/8 and 9/0 at the same time to exit the program mode.
   • Wait for 5 seconds; the driver door module (DDM) will exit the program mode automatically.
   • -------------------------------------------------------------

Programming —Transmitter

1. Cycle the ignition from OFF to RUN four times within three seconds. The locks will then lock and unlock, confirming program mode has been entered.

1. NOTE: When the first keyless entry remote transmitter is programmed, all other keyless entry remote transmitters are erased.
   Press any button on the transmitter to be programmed.

1. If additional keyless entry remote transmitters are to be programmed, repeat step 2 within 7.5 seconds.

1. To exit program mode, turn the ignition to START or wait 7.5 seconds.

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Programming —Remote Memory Activation NOTE: This procedure must be completed within 5 seconds.

1. Press the SET button on the driver door panel.

1. Press any button on the keyless entry remote transmitter to be associated with a memory setting.

1. Press the 1 or 2 memory button on the driver door panel.

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Programming —Autolock and Horn Chirp

1. NOTE: This procedure must be completed within 30 seconds.
   Turn the ignition switch to RUN.

1. Press the UNLOCK button three times.

1. Turn the ignition switch to OFF.

1. Press the UNLOCK button three times.

1. Turn the ignition switch to RUN. The doors will lock and unlock to confirm entry into program mode.

1. Press the UNLOCK button once to toggle the Autolock feature on or off, or twice to toggle the Horn Chirp function on or off. The horn will chirp to confirm toggling of the Autolock feature.

1. Exit program mode by turning the ignition to OFF, START, or wait 7.5 seconds.

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does trunk button work? panic button?
here's 2003 info:

• The doors do not lock/unlock using the remote transmitter

• Remote transmitter.
• Driver door module (DDM).

• Go To Pinpoint Test G .

SECTION 501-14: Handles, Locks, Latches and Entry Systems 2003 Town Car Workshop Manual
GENERAL PROCEDURES Remote Transmitter Programming

1. Cycle the ignition from OFF to RUN four times within three seconds. The locks will then lock and unlock, confirming that the program mode has been entered.

1. NOTE: When the first keyless entry remote transmitter is programmed, all other keyless entry remote transmitters are erased.
   Press any button on the transmitter to be programmed.

1. If additional keyless entry remote transmitters are to be programmed, repeat Step 2 within 7.5 seconds.

1. To exit program mode, turn the ignition to START or wait 7.5 seconds.

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