Thule 12v Step "Chattering" (6 Viewers)

[Smallfluffydog]

Hi, I'm new to this forum so apologies if this has been posted before.

We have 2014 Auto Sleeper Stanton

(Nuevo on a Mercedes Sprinter) fitted with a Thule 12v step, operated by a push button. It auto retracts when you start the engine, and there is an alarm that sounds when this happens, which suggests it has the relay fitted for this purpose.

Recently it has developed a "chatter" at the end of each stroke (see video) but otherwise seems to work ok.

The other day when I started the engine with the step retracted, and the van in every other sense ready for the road, the step started chattering and the alarm sounded, suggesting the step was extended when it definitely wasn't. I silenced the alarm but had to turn the engine off and restart it to clear the fault.

Any ideas anyone? I feel it could be the relay as everything else looks fine, but where have Auto-Sleeper fitted the relay? That is one of life's mysteries I need to solve

 

[GeoffnDee]

If your Autosleeper has a Sargent habitation PSU system there could be a Sargent separate EM50 interface fuse/relay box fitted which controls the step operation (along with other items) and it could be the cause of your problem , if the step linkages etc are ok .