Self Retracting Step

Discussion in 'Tech/Mech General' started by OldAgeTravellers, Oct 11, 2016.

  1. OldAgeTravellers

    OldAgeTravellers Funster Life Member

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    Hi,
    My Hymer has a button to retract the step which is ok but, my previous van retracted the step as soon as I started the van. Has anybody done it? Presumably a relay activated by the +D terminal but it should only activate for a second I presume.
    I am sure somebody has done it but I can't bring anything up with a search.
    It is a Project 2000 step.
    Steve
     
  2. Lenny HB

    Lenny HB Funster

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    Should be easy you will need a timer relay I.e. one that the contacts close for a few seconds then open., plenty on ebay. You only have to connect the normally open contacts axross the step switch contacts. D+ terminal will be available on the Elektroblock.
     
  3. Fletton

    Fletton Funster

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    My project 2000 does retract when engine is started... There is a "relay" I assume... Under the seat near the door... I know this because I started the engine with step out... And could hear a clicking sound... So I investigated.... And alas found the unit... Only to realise that I'd left something on the step that was preventing it from retracting... Duh!

    I could take a pic if you wish... But not this eve... :)
     
  4. xsparks

    xsparks Funster

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    Recently this subject with wiring diagrams was covered in M.M.M. not sure which month.
     
  5. andy63

    andy63 Funster

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    The last step I wired to close on the engine run used a switch on the step which activated a buzzer when the step was out with ignition on..
    It's just a circuit to ground when the step is open and when the step closes it opens the circuit. ..
    The relay coil is supplied with the run signal.... which closes the step.. when the step shuts it opens the relay coil circuit. .
    You can wire a small suitable capacitor across the coil which makes sure the step pulls ridht up.. ie supplies the coil momentarily after the switch opens the circuit. ..
    Hope that makes sense. .
    Andy. .
     
  6. DavidG58

    DavidG58 Funster

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    I sort of get the logic of why you would want it to close on engine start but I can think of 2 reasons not to and there must be more

    we run our engine before pulling off, only a couple of minutes, but we need it running before we can raise our hydraulic levellers, but when started how would you then get out?

    Also and a much bigger fear having nearly broken Bev's leg, she was getting in our old MH which had auto retract I started the engine luckily just as she put her foot on the step rather than her full weight so no real harm done when the step vanished from under her, but it scared the life out of her at the time

    now we just hear the buzzer and press the button, it seems easy enough :)
     
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  7. andy63

    andy63 Funster

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    Not if your deaf like me:LOL:
    We've been here a few times with the various pros and cons ..
    I have to say I feel more comfortable with it closing.. driven off with it out loads in present van after been used with my camper self closing..
    Andy
     
  8. Lenny HB

    Lenny HB Funster

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    By pressing the switch.:D
    If you use a timer relay as I suggested the function will only operatrate for the first few seconds after starting the engine.
     
  9. OldAgeTravellers

    OldAgeTravellers Funster Life Member

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    Hi Lenny HB,
    Is this http://tinyurl.com/zcbnw6l what you were thinking of. It would certainly work but of course the +D feed would be supplying power all the time so the unit would be powered up all the time.
    The capacitor on a relay sounds good that @andy63 suggested as I have quite a few 12volt relays any ideas of capacitor size Andy?
    @DavidG58 I understand your fears but I don't think that is an issue for us. Automatic retraction is far more important as I often mistake my reversing bleeper for the step out warning.
    I will have a play when I get a minute, just thought somebody would have done it, hence the question.
    Steve
     
  10. G T and Dottie

    G T and Dottie Funster

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    I did post a while back as to whether the auto retract system could be switched through the handbrake rather than start.
    This would cover both bases both @DavidG58 and those that prefer to close on start up.
    I'm in the David g58 camp, I start mine up while I finish buggering about outside for a couple of minutes, but have to remember to stop a certain passenger from trying to get out!
     
  11. andy63

    andy63 Funster

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    Hi.. a photo of the relevant section of the omni step instructions..
     
  12. andy63

    andy63 Funster

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    20161012_152533.jpg

    Sorry for the mess I've made in posting... on my phone and it's playing up..:)..
    The relay coil will have a voltage across it all the time the engine is running but there will be no current flow once the step retracts and opens the switch... the omni step had a switch built in but if it didn't it would be possible to fit a switch... it's just a path to earth which as I said opens when step retracts and the capacitor just makes sure it pulls up fully..
    Andy
     
  13. Lenny HB

    Lenny HB Funster

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    The description on those ones is very confusing, this one will do the job.
    The reason you use a time delay relay is because the D+ connection is on all the time the engine is running. The relay contacts will make for the set time only after that the relay contacts will remain open until the engine is turned off and will work again next time the engine is started.[/QUOTE]
     
    Last edited: Oct 12, 2016
  14. dave newell lvs

    dave newell lvs Trader-Vehicle Services

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    Hymer generally use acstep control module from Schaudt, this includes a trigger that can either be D+ (engine running) or more commonly through a manual switch by the drivers position, often on the knee trim. Personally I think auto retract is very dangerous, I know of atvleast one occasion when a lady suffered a very bad compound fracture of her ankle because of it. A warning buzzer and manual retraction is by far the better option in my opinion.

    D.
     
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  15. tonyidle

    tonyidle Funster

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    It is worth giving some thought as to whether the auto option is the best. A friend of mine has a van with an auto-retract step and whilst he and his wife were on holiday he was doing something (testing something or simply fiddling :)) that caused him to turn on the ignition. His wife, unaware of what had happened, stepped out of the van. She fell and was shocked but unhurt. I've been known to turn on the ignition when parked on site and I asume others have to. It's a long drop if the van has double step.

    Edit: just noticed Daves post saying much the same.
     
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  16. OldAgeTravellers

    OldAgeTravellers Funster Life Member

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    Thanks Dave, would that module be within the EBL101 or elsewhere. So I may already have what I want anyway.
    I understand the fears but we have had a self retracting step for 10 years without a problem although I must say it would not retract if the door was open so a switch on the door in series with the +D feed for the step to inhibit retraction may be the safest answer to overcome the accidents already described.
    @Lenny HB thanks for the link that looks like the job if I can't find or don't have the module Dave has mentioned.
    Steve
     
  17. Speve

    Speve Funster

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    I realise that you have problem hearing buzzer but have you considered fitting a warning light at higher level that would remind you to retract step might be a little easier?
     
  18. gus-lopez

    gus-lopez Funster

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    Ask @ianthebuilder :D
     
  19. Lenny HB

    Lenny HB Funster

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    Module with either be under one of the cab seats or under a draw near the door, normally there are two modules.
     
  20. dave newell lvs

    dave newell lvs Trader-Vehicle Services

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    What you want is easy to achieve, take an engine running signal to the switch/button by the driver and connect it to the output of that switch, job done!

    D.
     
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