GM keyless entry

My GM keyless entry pad is intermittant. Cleaning dosen't seem to help. Anyone seen a schematic for these things?

Thanks, Chuck

Reply to
Chuck Norisez
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Have you changed the battery in any recent time?

I worked on one for a late model Chevy Malibu recently and found bad solder on all of the battery connections. Resoldering the contacts (some of which were easier than others) restored perfect operation.

I would not call it really easy, as the through-hole pins of the battery holder were only barely long enough to be seen on the other side of the hole in the circuit board.


Reply to
William R. Walsh

The problem could be either the keypad, battery holder, cracked PCB, or the car receiver.

If you have a reasonably fast 'scope you might be able to see the signal given off by the transmitter - take a short hunk of wire, wrap it around the transmitter, then hook one end to the probe and the other to the probe ground wire. Press the button and see if the scope shows something with the voltage set to the lowest position and the horizontal set to just about the fastest (except for a VERY fast scope of course!). I use this setup for testing 21mHz controllers used in old Wall games (coin-operated arcade games).

Can't you order a replacement module from GM?

If not haunt second hand shops looking for similar units for parts....

John :-#)#

    (Please post followups or tech inquiries to the newsgroup)
  John's Jukes Ltd. 2343 Main St., Vancouver, BC, Canada V5T 3C9
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Reply to
John Robertson

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