Can anyone identify this BX gizmo?
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Thread: Can anyone identify this BX gizmo?

  1. #1
    Member Motorgnome's Avatar
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    Default Can anyone identify this BX gizmo?

    G'day everyone.
    I'm wading through the dash wiring harness on the BX & am wondering what this "relay box" is for. It lives on the passenger side of the heater box & when I removed the crash pad, found it "floating" on its wires. It has had some wires spliced onto it at some stage, but they were just cut off.

    Any ideas?

    Cheers, Jason.




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  2. #2
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    Dunno. Is it in the BX parts manual I linked once before? Plugs etc are there.

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    Hi
    Who knows but it may be an aftermarket central locking controller perhaps
    jaahn
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    1000+ Posts robmac's Avatar
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    It's clearly "a jesus box" because whenever anyone finds it under the dash "they exclaim jesus what is this?"

    This name was coined by a fellow technician at Village Theaters, when I first started working for them in the early 1970s.

    In those times Cinema Sound was all valve, with the equipment distributed throughout the projection room in many small boxes. And there were plenty to open up and " exclaim jesus what is this?"
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  5. #5
    UFO
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    Quote Originally Posted by jaahn View Post
    Hi
    Who knows but it may be an aftermarket central locking controller perhaps
    jaahn
    Fitment of aftermarket alarm/disabling systems was popular around the time of the BX and probably all Aus delivered ones have some form. Little UFO's first BX had a small red button in the glovebox that had to be pushed for the first start after a flat battery or battery change. It reset the system or some such nonsense.

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    Fellow Frogger! flipperman's Avatar
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    I'd second an alarm, do you have a siren under your bonnet?
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  7. #7
    Fellow Frogger! dimistyle's Avatar
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    I thought the green and grey wires we're for the stereo but still not sure what this box would be doing. Not enough wires for an alarm. Im also thinking central locking if not used for the stereo?

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    1000+ Posts Ken W's Avatar
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    My guess is that it is a central locking controller that the original mongoose alarm system connected to so it had radio remote central locking rather than just the key activated system.

    Cheers, Ken

  9. #9
    Fellow Frogger
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    Factory issue central locking control I'd expect as Ken suggests.

    See what is printed on the other side and search for info via Google. Probably Bitron or Cartier followed by some numbers.

    I remember being told the Mongoose remote and alarm was locally fitted to the 16 Valve cars. Maybe, also for some of the other models? It might have become unreliable and been removed. Random no starts (bad relay) or alarm tripping become very annoying.

    Another possibility is an interior lamp dimmer/timer module if the BX has this function. Aftermarket alarms sometimes used the dome light as a trigger and also an auto arming timer, which might explain the old soldered joints. Refer the wiring diagrams for connectors with the number of pins and rows of pins present and connected wires. If it's a 7 pin, the diagram usually shows something like 7V Mr = 7 way Brown.
    Last edited by David S; 23rd July 2017 at 12:35 PM.

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    Member Motorgnome's Avatar
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    Hmmm. It's not Mongoose, though it might have interacted with the alarm at some stage, hence the spliced wires. It plugs in to the factory harness & is made in France..so it is original equipment.. I'll do some more research. The central locking module is under the rear of the Centre console...
    I'll see what the Pom's know hey!
    Cheers, Jason

  11. #11
    Member Motorgnome's Avatar
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    Great advice David !..A bit of googling & translating revealed it's an interior light timer relay, that was also used in the 405.

    Thanks for that.
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  12. #12
    Real cars have hydraulics DoubleChevron's Avatar
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    I just unplug stuff and see what no longer works.... It gets confusing when you unplug a whole heap of stuff and everything continues to operate though
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    Too many posts! JohnW's Avatar
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    Quote Originally Posted by UFO View Post
    Fitment of aftermarket alarm/disabling systems was popular around the time of the BX and probably all Aus delivered ones have some form. Little UFO's first BX had a small red button in the glovebox that had to be pushed for the first start after a flat battery or battery change. It reset the system or some such nonsense.
    That button's the bypass for the immobilizer as you say. It was a locally "factory fitted" alarm/immobilizer - just like ours had. Took a while to find out that it even existed and then how to use it!

    Ours had the dimmer function too. I'm very glad I never had to chase things like that as it never went wrong electrically except an AC fan speed control.
    JohnW

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  14. #14
    Fellow Frogger! Greg's Avatar
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    Hi Guys,

    Yes, either interior light delay, or the fuel flow calculator is similar. I think the former. Parts cat shows both are a similar box.

    There was no factory alarm available on a BX, and the wires are all "Citroen", and there is a mount on the box so that it can clip onto a bracket, similar to the mount still used on currant cars.

    I don't remember Franzcar ever fitting alarms to BX's.

    Best regards,

    Greg
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