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The key fob receiver is located round the ignition key barrel Take off the plastic cover round the steering wheel, it's the black round plastic piece with an electrical plug fitted.
CR2032
in the upper control module
Open the key fob and see what battery it contains.
pop it open, two batteries + side down
There is a little button battery inside the key fob that sends a signal to the receiver in the car. The battery is probably dead.
the key fob battery is the battey in a key fob torch
the fob may need recoding to the vehicle, if you still have the second fob then point and operate this fob at the receiver (by the interior mirror) and operate the faulty fob at the same time, this should bring the second fob back into sinc. robb
Changing the battery on a Viper alarms key fob is very easy to do. The back of the key ob. comes off and the battery is located inside. Simply change out the battery with a new one and replace the back of the key fob.
Either via Infra-Red or Radio Frequency key fob programmed with a receiver in your vehicle.
Ford Outcode/Incode Calculator +SW Dongle support older Jar but not newer
what is the reason for not fixing camera in key fob