406 Coupe - won't switch off
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Thread: 406 Coupe - won't switch off

  1. #1
    Fellow Frogger! aquinian's Avatar
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    Default 406 Coupe - won't switch off

    Hello all,

    Series of events:

    Key stuck in "on" position and would not turn at all. Removed battery cable to kill it. After much effort we managed to remove the barrel and switch. Picked up a replacement today from a wreck (key, barrel, and switch). Fitted them temporarily (plugged the wires in) and started the car. All good, except that turning the key to the "off" position doesn't stop the car, she keeps running (as she did with the broken barrel/key).

    So I'm wondering if this is a coincidence, or if there's a known issue, or what? In any case, we need to fix it!

    Any advice warmly welcome!

    Regards,
    John.

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  2. #2
    1000+ Posts Peter Chisholm's Avatar
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    Having had the "pleasure" of dismantling and reassembling a 406 ignition lock, are you sure you've reassembled it correctly - ie the switch part?

  3. #3
    Fellow Frogger! aquinian's Avatar
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    We didn't dismantle the switch, Peter, we just transplanted it.
    Current: 406 Coupe, 504 Sedan

    Previous: 306XSi, 205GTi, 206Gti, 505 V6, 505 Wagon, 504 Sedan, 504 Wagon, 306Gti6, 306XT, 205Si, Citroen XM, Citroen Xantia

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    1000+ Posts Peter Chisholm's Avatar
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    Maybe the switch in the replacement is faulty. The switch in mine was faulty (the engine wouldn't switch off) and after disassembling, cleaning and lubricating the actual switch, all was well. Seeing as your original fault sounds like the barrel rather than the switch, why don't you try swapping over the switch to the replacement barrel? It's a bit fiddly though.

  5. #5
    Fellow Frogger! aquinian's Avatar
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    Got it working, Peter, however now it cranks and won't start, which I think is the laserline alarm/immobilizer...
    Current: 406 Coupe, 504 Sedan

    Previous: 306XSi, 205GTi, 206Gti, 505 V6, 505 Wagon, 504 Sedan, 504 Wagon, 306Gti6, 306XT, 205Si, Citroen XM, Citroen Xantia

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    1000+ Posts Peter Chisholm's Avatar
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    It's a voyage of discovery!
    Tom_95 likes this.

  7. #7
    Fellow Frogger! aquinian's Avatar
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    Aftermarket stuff!
    Current: 406 Coupe, 504 Sedan

    Previous: 306XSi, 205GTi, 206Gti, 505 V6, 505 Wagon, 504 Sedan, 504 Wagon, 306Gti6, 306XT, 205Si, Citroen XM, Citroen Xantia

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    1000+ Posts Beano's Avatar
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    Don't 406s have a red coloured reset button in the engine bay, rear passenger side ? When should it be used, and what exactly does it do ?

  9. #9
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    My 306 has it as well, lots of cars do. Under that soft button are two electrical contacts, a metal ball and a magnet. The magnet holds the ball against the contacts, completing a circuit to the fuel system. The idea is that in the event of an accident, that metal ball will pop out of place and cut the flow of petrol. Basically a mechanical failsafe.
    2000 306 GTi6 'Josie'

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