[s-cars] 94 S4 infra-red key replacement options

[Theodore Chen]

chris, i put a prestige APS-25CH into my '92 a long time ago, and can lock/unlock my car from 50 feet away.  i could have gotten a more expensive alarm system, but all i wanted was the RF remotes.  i'm not wild about the somewhat cheap remotes, but they have worked well for several years and the system was less than $40.  most alarm systems will probably work, as long as they ground their outputs to activate, and double pulse to unlock.

referring to the audiworld diagram, the relays are unnecessary extra wiring (besides drawing more power and decreasing reliability due to their mechanical nature).  i wired diodes in-line and had no problems at all.  let me know if you need help wiring.

http://www.audifans.com/pipermail/s-car-list/2006-January/047628.html




----- Original Message ----
From: Christopher Leal <chris_leal at sbcglobal.net>
To: s-car-list at audifans.com
Sent: Tuesday, March 10, 2009 8:19:23 PM
Subject: [s-cars] 94 S4  infra-red key replacement options

S-heads,

Finally tired of replacing batteries and the crappy range I have with the infra-red key locking/unlocking. On a jeep I had I wired up a cheap aftermarket fob that gave me extended range. I noticed on Audiworld someone did this on their A4: http://www.audiworld.com/tech/elec52.shtml  Has anyone found better options for replacing the existing system? Maybe an upgrade to later Audi components with the RF capability?

Any guidance is appreciated.

Cheers,
Christopher
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