J-43241 Remote Keyless Entry Transmitter Tester This affordable, quick and easy to use Keyless Remote Tester works on Saab and most aftermarket remote transmitters. This tester performs a simple pass/fail test by simply placing the transmitter on a test pad on the unit. If the keyless transmitter is functioning properly, a green light flashes and a beep is heard. This indicates that the transmitter is sending pulsed data, and any faults are therefore elsewhere in the system.
If the keyless remote transmitter is not functioning properly, the green light will not illuminate, indicating that the transmitter may need to be replaced.