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GM keyless entry

Discussion in 'Electronic Repair' started by Chuck Norisez, Jun 30, 2010.

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

    Thanks, Chuck
  2. 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
    Call (604)872-5757 or Fax 872-2010 (Pinballs, Jukes, Video Games)
    "Old pinballers never die, they just flip out."
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