I have a few trouble shooting things you can do. These should be taken only if your keyless entry remote was working at some point and then stopped working.
1) Wipe the board
The board inside your remote can get a lot more filthy than you think! When the board is dirty it can prohibit the contact to the circuit board when you push down on the button. Simply wiping the circuit board off can make your key fob like new again!
2) The old car battery reset trick
I know this sounds absurd, but it works sometimes and is worth trying. If you exhausted all of the options above, disconnect bot terminals on your car battery for 10 minutes. Then reconnect them and try your key fob. This has worked for many people and I have no idea why. If you do, please comment below to explain.
3) New fob!
It might be time for a new key fob! No need to dread over the expensive costs of a new key fob, at Keyless Entry Remote Fob Inc., you can get a refurbished one for a very affordable price! You won't even be able to tell the difference. Just search your vehicle make, model, and year to find your key fob or give us a call at 402-671-5100.
SOURCE: nissan murano 2005 sl keyless entry remote programing
Close all vehicle doors, LOCK doors using drivers side switch.
Insert key all the way into the ignition, (do not turn) remove key.
Repeat this step 5 times. (6 total)
Hazards should flash to indicate program mode.
Press any button on transmitter to be programmed, hazards should flash to indicate successfull program.
*For additional remotes, cycle drivers door lock UNLOCK, LOCK, press
any button on remote, hazards should flash. Repeat step as necessary.
Ignition ON, (engine off) ignition OFF, UNLOCK using drivers side switch, test remotes.
Source
SOURCE: Reprogram a keyless entry remote
Hello
this is how to program the remotes/keyless entry
How
NOTE
The 5 digit permanent code is located in one of the following places
I hope this help
Regards Paul
www.limotec.co.uk
SOURCE: Both of my keyless entry remotes just stopped working any ideas
sometimes you have to hold the lock and unlock at the same time and stand close to your jeep until the locks unlock and lock agian if that works then they are reset if not than try to change the batterys in one remote and retry
SOURCE: programming a keyless entry remote
Key Fob Auto Learn
This procedure will first erase all known key fobs. The procedure will then program a single or multiple key fobs. Method 3 is a series of three 10-minute key cycles, for a total of 30 minutes. This procedure requires that you have a replacement key fob and the vehicle mechanical key.
Important: All previously programmed key fobs will be erased upon completion of the 30-minute programming procedure. The order in which the key fobs are programmed will determine its numbering position within the RCDLR memory. The first key fob programmed will be key fob #1, and the second key fob programmed will be key fob #2. The number stamped on the key fob case is for reference only: #2 can be programmed as #1.
Do not place any known good key fobs in the vicinity of the vehicle when programming.
The vehicle must be OFF.
Place the replacement key fob in the console pocket with the buttons facing forward.
Insert the vehicle key in the driver door lock cylinder located in the driver door handle and cycle the key 5 times within 5 seconds.
The DIC will display a message: OFF/ACC TO LEARN.
Press the OFF/ACC portion of the ignition button.
The DIC will display a message: WAIT 10 MINUTES, then it will count down from 10 to 0, one minute at a time.
When the counter reaches 0, DIC will display OFF/ACC TO LEARN.
Repeat steps 5-7 two more times, for a total of 30 minutes.
The DIC will display a message: OFF/ACC TO LEARN.
Press the OFF/ACC portion of the ignition button.
A beep will occur and the DIC will display: READY FOR FOB 1. At this time all previously known key fobs have been erased. When fob 1 is programmed a beep will be heard and the DIC will display a message: READY FOR FOB 2.
Additional key fobs can be programmed by taking fob 1 out of the pocket and inserting fob 2. If desired, up to 4 fobs can be programmed. Once 4 fobs have been learned, the DIC will display a message: MAX FOBS LEARNED, and automatically exit the program mode.
If learning less than 4 key fobs, press the OFF/ACC portion of the ignition button to exit the program mode.
Operate the active portion of each key fob in order to finalize the programming sequence and verify correct system operation.
Good luck and hope this help's keep me posted, there are 3 other methods and the 5th method is a tech 2 scan tool that the dealer uses but this should work on your year of cadillac.
SOURCE: I can't find the keyless entry code for my 2004 ford freestar
The code is on the fuse box under the dash near the hood release. On my van there are two bar codes on a sticker attached to the fuse box. Under the first bar code, on the right side is the 5 digit code (bring your glasses the numbers are really small). After you get this code, just search the internet and there are plenty of forums on programing the keyless remote and also adding your own unique number to the key pad entry.
Good Luck
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