406 indocators and alarm problem

Discussion in 'Peugeot 406' started by PH13, Jan 15, 2006.

  1. PH13

    PH13 Guest

    Had this very intermittent problem for a while (over 6 months since last
    time). When it happens the indicators flash when you press the lock button,
    but not when you press the deadlock button, but you can hear the locks
    working. Then when you unlock, you can hear the relays operate, but the
    indiactors don't flash. Also, when you operate the turn signals, all
    indicators flash regardless of which way you indicate. Often normal service
    can be resumed by disconnecting and reconnecting the battery a few times.
    Has anyone come across this?

    PH13, Jan 15, 2006

  2. I don't know if this information will help. My 406 does not have an alarm
    fitted and the locking has always worked exactly as you describe. The only
    time the indicators flash is when you press to lock. They never flash on
    deadlock or unlock. Probably no help but it may give you a clue.
    Keith Willcocks, Jan 15, 2006
  3. All the indicators flashing regardless of direction can be a sign of a bad
    earth on one of the corners.

    Ron Robinson
    R.N. Robinson, Jan 15, 2006
  4. PH13

    PH13 Guest

    Thanks Keith, but I don't think so. I'm looking for some pointer as to where
    the alarm circuit, indicators and possible hazard warning lights come
    together such that maybe a stuck contact on a relay could cause the left and
    right indicator circuits to be permanently connected, The change in behaviur
    of the lights when setting and unsetting the alarm isn't a problem, just a
    symptom. normal behaviour is all indicators flash when lockiing the car and
    they flash again if you set the alarm. Then when you unset it from the
    alarmed state only, all indiactors flash rapidly about 4 times. This isn't
    happening, but you can hear relays operating so I wonder if there is a feed
    missing again beacuse of a stuck contact.

    PH13, Jan 15, 2006
  5. PH13

    PH13 Guest

    But wouldn't that be at reduced brightness and altered flash rate? Also this
    goes hand in hand with the loss of flash on alarm set and unset.

    PH13, Jan 15, 2006
  6. Not neccesarily

    Puzzling, I admit. Sounds as though you are expecting a combination of
    circuits with a bad earth somewhere to behave logically. Actually it does,
    but it makes up its own logic...

    Ron Robinson
    R.N. Robinson, Jan 16, 2006
  7. PH13

    PH13 Guest

    Hi Ron,

    Having trouble actually finding the earthing points to check...any
    suggestions there? In the meantime have removed bulbs in turn, thus taking
    that earth point out of the circuit, ending up with both rears out then put
    those back and took both fronts out. Behaviour still the same; both sides
    flashing regardless of which way the flasher switch is set.

    Any other suggestions?

    PH13, Jan 17, 2006
  8. Sorry, I was replying theoretically (and from past experience on other
    cars) rather than practically as I don't have a 406 myself. You could
    perhaps try bridging from the earth part of the bulbholder to a known good
    earth in each corner in turn to see if that makes any difference.

    Ron Robinson
    R.N. Robinson, Jan 18, 2006
  9. PH13

    PH13 Guest

    Got in the car this morning to find that, although my efforts made no
    difference last night, the indicators are now working correctly, but the
    flash on setting and unsetting the alarm are still missing (that's the first
    time that's happened). I need to look at a proper circuit diagram, but so
    many things show up as black boxes these days. I found some diagrams at
    http://peugeot.mainspot.net/wiring406/index.shtml, but they don't show turn
    signals or alarm.
    I imagine that there are relay contacts in the alarm ECU that supply 12v
    directly to the lamp circuits down stream of the turn signal switch. I've
    had one side or the other stay lit occasionally (i've seen posts where
    changing the relays is mentioned) , so guess the relays sometimes stick on
    and perhaps 2 stuck relays with no 12v applied could account for the all
    lights flashing symptom, but I'm having difficulty imagining what
    combination of relays could account for the flash when the locking, but not
    when deadlocking
    PH13, Jan 18, 2006
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