How to power your C4 UrS central locking system when your battery is dead

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  • UrS4boy
    S2Forum Obsessed
    • Feb 2006
    • 11859
    • Country: Canada

    #1

    How to power your C4 UrS central locking system when your battery is dead

    and your front door locks are mechanically disabled (how you got into this situation, we won't go it into)

    Situation: Your two front doors have mechanical lock issues (won't open with the key turning in the lock). Furthermore, your battery is dead so the central locking (and unlocking) system pump won't work.As a result, you can't get into your car to open the hood (bonnet) or access the back seat to put a battery charger on the battery (and get the central locking system to work). Not a good situation.

    One thing you can try is to open the hood (bonnet) from underneath the car using information from this Hood (Bonnet) Release How it works and how to fix it post. If you do get the hood (bonnet) open, then you can charge the battery from the + post on the firewall. If you can't get the hood open, then all is not lost.

    While there might be a mysterious electrical connection box under the car (items 8 and 9 in the diagram below)(reward offered if anyone finds this), one potential solution is to hook the battery charger positive cable to the thick cable at the starter, as shown in the diagram below (negative cable to the chassis somewhere handy):

    Last edited by UrS4boy; 13 July 2011, 20:08.
    RS2'd 93 UrS4 5 spd sedan
    94 UrS4 V8 6 spd manual avant
  • andy10v
    S2Forum Zealot
    • Mar 2009
    • 5996
    • Country: Scotland

    #2
    Would the cable on the alternator work as well?
    Current-2004 Impreza PPP wagon

    Sold-92 3B coupe-RS2+, 996s, konis, rear torsen, forged rods........
    Sold ABY-stock

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    • UrS4boy
      S2Forum Obsessed
      • Feb 2006
      • 11859
      • Country: Canada

      #3
      Originally posted by andy10v
      Would the cable on the alternator work as well?
      Probably, if you can access it without having the bonnet (hood) open. Starter is nice and low and not covered by the belly pan, etc.
      RS2'd 93 UrS4 5 spd sedan
      94 UrS4 V8 6 spd manual avant

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