Repairing Remote Radio Key Fobs.

[BobNandra]

Key fob light flashes but vehicle doors do not open or lock consistently?

 

You change the batteries and the Key Fob Seems to work OK for about a 2 days and then same symptoms again ?

 

The following is how I repaired my Key Fobs.

 

WARNING. When taking the Key Blade away from the Remote Key Fob, make sure you do not loose the small black block which is just held in place in the Key Blade section. Loosing this will result in your car NOT starting.  This is part of the immobiliser and is easily lost. 

 

This is what to try first to fix the simplest fault before going out and buying a new remote key fob.

 

When there is a loose fitting connection, such as where batteries have just a touching connection, or a flexible metal connector just touches the circuit board to make a full connection, oxides build up.  The second issue is what happened in my two key fobs. You need to simply remove the oxide and sometimes re-tension the metal clips with a nose plier or a thin blade screwdriver.

 

You will see on the circuit board, there are scratches from the flexible connector coming from the battery section. Using a thin blade screwdriver, or fine sandpaper, rough up the silver connection point on the circuit board.  Then using a thin blade screwdriver, or nose pliers, gently lift up the connector on the battery side.  You may need to do the same to the middle battery connector.

 

Reassemble key and test on your car....

 

(I am having issues uploading pictures but will load them asap.)

 

Bob.