CX Dash Electrical Connectors
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Thread: CX Dash Electrical Connectors

  1. #1
    Tadpole
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    Default CX Dash Electrical Connectors

    Afternoon all,

    Has anyone ever dismantled the dash completely in a S1 CX?

    I'm getting voltage drop from the battery to the back of the instrument cluster, which is causing things to fail as soon as there's any oxidization or dirt in the printed circuit board connections or bulbs.

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    As there's been a lot of fuzzy connections throughout the car, I think I need to clean out the ones behind the dash itself (they seem to plug into where the back of the cluster pod meets the dash pad, but don't seem to budge).
    Can I remove and clean these without taking the dash completely apart or will I lose the other half of the connector in behind the dash pad?

    Have been through the cluster itself and all the connections into the printed board, all the relevant senders, everything else is serviceable.

    Cheers,
    Mitch

  2. #2
    1000+ Posts gerrypro's Avatar
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    It is possible to remove the instrument cluster by
    A: removing the upper pad cover. (two screws in tubular recesses under the dash and six at the front upper of the instrument face)
    B: removing the switch pods.
    C: releasing the clips under the cluster.
    D: prising the cluster upwards to clear the plastic dial frame.
    E: removing the speedo cable connector at the rear of the cluster and releasing the plastic connector blocks from the rear of the cluster.
    F: the cluster should now lift out completely.
    Cheers Gerry

  3. #3
    Real cars have hydraulics DoubleChevron's Avatar
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    be really careful you don't break the circuit ribbon when you lift it out too Every gauge bouncing in unison with the indicators due to voltage drop is normal behaviour
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  4. #4
    1000+ Posts gerrypro's Avatar
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    I had to hard wire two of the printed circuit tracks. They are really delicate and easily damaged. Just expansion and contraction from heat through the windscreen is enough to provoke failure!
    Cheers Gerry

  5. #5
    Too many posts! JohnW's Avatar
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    Every now and again, my rev counter bounces around on idle. I'm leaving well alone until something actually fails. And yes, the flashers do affect things, a less than perfect earth somewhere I guess.
    JohnW

    Renault 4CV 1951
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  6. #6
    Tadpole
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    Thanks guys, I've had no dramas removing the cluster itself, have done that a few times now - it's just when you remove the cluster and look in the space where the cluster sits, there are three connectors that run into the bulkhead - these are the ones I'm curious about.

    The cluster itself is OK, have tested it and got everything to work after a good clean, so I know it's fine, but something else in the chain is letting it down

    Glad to hear some voltage drop is normal, I'm getting it so badly that lights cut out/highbeams/gauges fail as soon as anything else is disturbed even slightly. I can probably live with it but the RWC man won't be pleased

    Are there any key grounds for all the ancillary electrics I should look at?

  7. #7
    Too many posts! JohnW's Avatar
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    Hmm. Yours sounds like more than "some" voltage drop! My gauges don't change with the flashers but the lights in the speedo and rev counter dim a bit, that is all, apart from the occasional hiccup on the rev counter.

    I'll be interested to hear what the problem WAS, after you have found it. Good luck.
    JohnW

    Renault 4CV 1951
    Renault R8 1965
    Renault Scenic 2005 (wife's)
    Renault Scenic 2007 (mine)
    Renault Scenic 2006 (daughter's)
    CitroŽn CX Pallas 1980

    National Co-ordinator, Renault 4CV Register of Australia

  8. #8
    Fellow Frogger
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    You are much more likely to have a problem with the abomination of connectors near the battery and from memory, there are a couple of exposed loom sockets on the chassis under the spare wheel. Near the battery, there is plastic distribution block with large spade connectors for several +ve leads and that's well known for giving grief. Also clean every earth point you can find. I can recall having problems with the indicators and that came down to a simple earth lead for the rear lamp unit.
    JohnW likes this.

  9. #9
    Too many posts! JohnW's Avatar
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    That's the exclusively Citroen collective noun, "an abomination of connectors". Wish I'd thought of that myself....
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    JohnW

    Renault 4CV 1951
    Renault R8 1965
    Renault Scenic 2005 (wife's)
    Renault Scenic 2007 (mine)
    Renault Scenic 2006 (daughter's)
    CitroŽn CX Pallas 1980

    National Co-ordinator, Renault 4CV Register of Australia

  10. #10
    Tadpole
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    You'd think French cars would have a reputation for electrical fragility or something...
    I think I'll take the Easter break to start cleaning and inspecting at the front and work backwards then. 6 years outside in the damp has done it no favours, somewhere a connector has become a resistor

  11. #11
    1000+ Posts gerrypro's Avatar
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    I that case I would suggest that you undo and clean every connector you can see and then re-assemble them. That includes the blocks on each of the relays. Undo clean and re-tighten the earth junction point next to the battery Circuit board cleaner is very useful to improve the connections then a coating of WD40 or silicon spray or whatever water dispersant that takes your fancy.
    Cheers Gerry

  12. #12
    Too many posts! JohnW's Avatar
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    Quote Originally Posted by RHK401 View Post
    You'd think French cars would have a reputation for electrical fragility or something...
    I think I'll take the Easter break to start cleaning and inspecting at the front and work backwards then. 6 years outside in the damp has done it no favours, somewhere a connector has become a resistor
    Good opportunity to pull out the headlamp and the battery and get decent access to that abomination of connectors....
    JohnW

    Renault 4CV 1951
    Renault R8 1965
    Renault Scenic 2005 (wife's)
    Renault Scenic 2007 (mine)
    Renault Scenic 2006 (daughter's)
    CitroŽn CX Pallas 1980

    National Co-ordinator, Renault 4CV Register of Australia

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