407 wiring what the!
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  1. #1
    Fellow Frogger! gromzx's Avatar
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    Default 407 wiring what the!

    Hi all.
    I was servicing my parents 407 hdi when I came across this:
    407 wiring what the!-20140913_165402.jpg
    The wires seem to be the right length and match in size and color to the ones in this plug.
    407 wiring what the!-20140913_165521.jpg407 wiring what the!-20140913_165457.jpg
    Can anyone tell me what these wires are for and why they might be cut like this.

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    While we're on the topic. The power steering oil is frothing up in the reservoir along with vibrations when steering.
    Is this a common problem and does it indicate a failed pump.

  2. #2
    Contented Peugeot Driver addo's Avatar
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    I think they're accessory wires for hardwired accessories. What are the codes on them?

  3. #3
    Fellow Frogger! gromzx's Avatar
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    I'll have to have a look tomorrow in the light.
    If I remember right, only 2 of the codes where readable anyway.

  4. #4
    Fellow Frogger! gromzx's Avatar
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    Sorry about slow reply. I could get access to the car till today.

    The large blue wire has 5544514DS on it.
    The yellow one has 579408DS on it.
    The other wires weren't readable.

  5. #5
    1000+ Posts driven's Avatar
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    Probably have an air leak, check all connections especially on return side

    Mixed fluid types can also cause this

    Or.. old power steering fluid, anti foaming additives are depleted

    Noise is probably pump bearings on way out

  6. #6
    Fellow Frogger! gromzx's Avatar
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    Quote Originally Posted by driven View Post
    Probably have an air leak, check all connections especially on return side
    At first glance this is what I assumed, but because of the location of the return hose I can clearly see clean oil not frothy returning to the tank. The froth appears to come from within the tank somewhere. That's what really has me puzzled.

    I will try changing the oil next time I do some work on the car, but not all seems right to me.

    There are no undue noises from the pump however. Just a bad vibration through the steering column, and so I've been told, it will occasionally refuse to work.
    Last edited by gromzx; 16th September 2014 at 06:22 PM.

  7. #7
    1000+ Posts Shobbz's Avatar
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    I overfill my fluid by about 3/4 of an inch. Stops the frothing. There was an issue with the pumps/ a return hose. There is info on Google and the UK Peugeot forums.

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  8. #8
    Fellow Frogger! gromzx's Avatar
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    Quote Originally Posted by Shobbz View Post
    I overfill my fluid by about 3/4 of an inch. Stops the frothing. There was an issue with the pumps/ a return hose. There is info on Google and the UK Peugeot forums.
    We took your advice and over filled the power steering and shore enough it fixed the problem.

    I did some research and found that it is a known issue.
    I find it strange that Peugeot would choose to ignore such a prevalent and noticeable problem. Its definitely not a good look for what's supposed to be a prestige luxury car.

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