Electric step failure

Discussion in 'Tech/Mech General' started by OldWomble, Aug 12, 2016.

  1. OldWomble

    OldWomble Funster

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    hi all
    We have a 2012 Hymer with a Project 2000 factory fitted electric step. The step will return with no problems on the switch but it won't extend out on it. I can pull the step out manually without any real effort so it's not jammed but it just will notnextend out on the switch. I have checked the wiring and all seems to be in order so any thoughts or ideas would be appreciated thanks.
     
  2. SandraL

    SandraL Funster

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    Is it a scissor type rather than slide out. If so mind your fingers! With scissor type there is a plunger switch on the step mechanism. It is likely it has failed as it collects muck n grime n water. If same as mine it is a car courtesy light switch. Intermotor 51840, google it or switch 51840 for pics to see it it is the same. It is simply a make/ break switch so can be tested with a multimeter. 2nd posting today re step switch. Above info gained fitting replacement switch to our 2013 hymer. Note rubber boot probably will not be included with replacement switch. Good luck.
     
  3. OldWomble

    OldWomble Funster

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    This switch seems to be working ok. I can't get in to test if the motor is getting power as its all sealed. Would anyone know if there is a relay or something to control the step and, if so, where Hymer might have hidden it?
     
  4. scotjimland

    scotjimland Funster Life Member

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    My Hymer step switch has two relays mounted on the back of the switch on a PCB . I had to replace mine for the same fault.. it's not cheap..

    have a look and see if yours is the same..


    https://caravan-parts.store.buegle....c-step-and-light-toggle-switch-/?k=:::6615098
     
  5. OldWomble

    OldWomble Funster

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    No. Mine is just a single toggle switch in the same housing as the interior and awning light switches. Got the switch out and just two wires to it. No relays that I can see
     
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  6. DavidG58

    DavidG58 Funster

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    Do you have a second switch on the dash, we do on our Hymer, does that one work?
     
  7. scotjimland

    scotjimland Funster Life Member

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    ok.. sorry can't help further then..
     
  8. BwB

    BwB Funster Life Member

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    Our Project 2000 step seemed to work just off microswitch changeovers but I guess there must have been a relay somewhere. However, I did have a problem similar to yours which turned out to be a broken split pin/roll pin in the connection from the motor spindle. I think it's probably meant as a shear pin. Anyway, it worked one way and not the other. Failing that, it could be one of your microswitches isn't being pushed enough to contact. However, the fact you can move the step by hand, I would guess the shear pin. I had to take the box cover off which hides the motor and the coupling was just on the motor spindle.
     
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  9. OldWomble

    OldWomble Funster

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    I would have thought I would hear the motor turning but there is nothing. I will try and get the cover off and have look but it's very difficult to get to.

    I still suspect a relay as I seem to be getting odd readings on the switch but the switch itself is ok
     
  10. BwB

    BwB Funster Life Member

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    Another thought, if the step appears to retract ok but not extend, maybe the "home" microswitch isn't connecting correctly to change over? This would mean any relay isn't being de/energised ready to work the step in the other direction. The microswitches on my step were on the sides of the frame and could be adjusted easily with the step extended (between the treads of the step) so may not be too much of a job to check.

    I would have thought that the torque/gearing on the step motor would prevent you moving it by hand but not impossible I guess. ( This is why I thought the shear pin might be damaged. )
     
  11. OldWomble

    OldWomble Funster

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    I can only find one micro switch, the one in the center under the step which closes when the step closes. I have had this one out and checked it and it seems ok.
     
  12. BwB

    BwB Funster Life Member

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    Is there one on the right hand side of the frame holding the steps (looking from outside the motorhome)? I think it was inbetween step 1 and 2 - presuming you have a two step model and it's the same as ours :)
     
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  13. OldWomble

    OldWomble Funster

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    No, it's the one step model
     
  14. BwB

    BwB Funster Life Member

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    Ahh, probably exhausted my uselessness now then :) Good luck with pin pointing the problem.
     
  15. OldWomble

    OldWomble Funster

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    I've just had another look and I can only see the one switch so I don't know how it knows when it's fully extended.
     
  16. OldWomble

    OldWomble Funster

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    But nevertheless, a big thanks for your help
     
  17. BwB

    BwB Funster Life Member

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    I should think there is another microswitch somewhere, possibly on a "flat" on one of the gears/cogs. Or behind the step assembly (which would require getting under the van to look at the back of the step). Anyway, best of luck with it. Maybe someone along this evening who has more experience on the subject.
     
  18. OldWomble

    OldWomble Funster

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    Now I'm totally confused - this afternoon it suddenly started working again yet I did nothing to it. Tried it just now and it won't extend again. Pull it out manually and press the switch and in it goes !!!
     
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