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Does battery change on keyless remote result in reprogramming?

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  • Does battery change on keyless remote result in reprogramming?

    Here's a stupid question - if you change the battery on your keyless entry fob, do you have go thru the reprogramming rigamarole again? I have an aftermarket Remocon RMC-105 fob that I bought a couple of years ago after losing an OEM keyfob for my '96 Mystique. I need to change the A23 battery in it, and can't find any info on whether it will need to be reprogrammed (you know, the paperclip jumper behind the glove box).
    1996 Mercury Mystique 2.5L Duratec
    Bone stock commuter w/ auto tranny slushbox

  • #2
    not usually.
    I strongly abide by the motto, "Safety third."

    I thought what I'd do was, I'd pretend I was one of those deaf-mutes.

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    • #3
      never had to reprogram any remotes when changing the batteries.
      - 12 Focus SE
      - 95 Mystique LS <-sold
      - 99 Contour SE Sport <- traded in 2/13
      - 99 Contour SeVT <- 3L/NPG Turbo
      - 2k Contour SVT - #2137

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      • #4
        Works fine now. The old A23 battery was down to 11.7 volts; the new one hits 12.6 V. I've had 12V batteries in garage door openers that still worked at as low as 7 volts, but I guess this system is just twichy-er.
        1996 Mercury Mystique 2.5L Duratec
        Bone stock commuter w/ auto tranny slushbox

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        • #5
          I believe the car is programmed to the remote, not the remote to the car. So the code for the key fob is actually stored in the car.
          1999 Silver Frost SVT - #2603/2760 Aug. 10, 1999.
          1998 Black SVT - #3035 Re-born 3/12/09

          1996 Mercury Mystique LS V6 MTX - retired @ 323,151km.
          1995 Ford Contour V6 MTX-sold @ 214,000km

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          • #6
            Originally posted by KyleH View Post
            I believe the car is programmed to the remote, not the remote to the car. So the code for the key fob is actually stored in the car.
            Yup. There is no actual programming in the remote. You can program the same remote to multiple cars if you wanted to.
            1998 SVT Contour 3L (B/MNB) #542 (His)
            2000 SVT Contour (SF/MNB) #1533 (Hers)
            2003 BMW 540i M-Sport (6 spd)
            2002 Cougar XR - XR Racing Red
            2002 Lexus IS300 SOLD!!

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