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Old 09-20-2020, 07:06 PM   #1
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Brand: Thor Motor Coach
State: Florida
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THOR #15030
Kwikee Steps extend when engine starts

Pulled the RV (2018 Four Winds 24FS Sprinter) out into the yard yesterday, washed it and went to put it back in the shed. The steps closed when I shut the coach door. Turned the ignition on and I heard the steps extend. Shut the engine off to investigate and steps retracted when the engine shut down.

Steps work as normal without engine on extend when door opens, retract when door closes, stay out when extended and switch is turned to off.

Checked all connections, no apparent loose ones, cleaned both chassis ground wires by the step motor. Door switch seems to be positioned correctly based on the description above. Used hand-held magnet and it does what it's supposed to.

Checked all of the fuses and breakers I could find (coach panel, left side of drivers compartment by hood lever, under drivers seat (nothing under passenger's seat)). Found two fuse bars and six micro breakers under drivers seat, none tripped. Looks like also some relays also under drivers seat, but have to remove seat to get to them.

This is a safety problem with the steps extended while driving. Has anyone else run into the problem and what was the solution? I temporally unplugged the step controller to back it back intro the shed.
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Old 09-20-2020, 07:17 PM   #2
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Brand: Still Looking
Model: Tiffin Wayfarer 24 BW
State: New York
Posts: 16,062
THOR #8860
I hate to ask this...
Are you sure that both doors were closed and latched?
Sorry...
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Old 09-20-2020, 07:21 PM   #3
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THOR #15030
Yes, all doors were completely closed.
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Old 09-20-2020, 07:24 PM   #4
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Model: Tiffin Wayfarer 24 BW
State: New York
Posts: 16,062
THOR #8860
Then it's got to be the switches.
Loose connections... Chafed wires... A buggered-up switch...
You're well beyond my "pay grade" with this: good luck!
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Old 09-20-2020, 08:12 PM   #5
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Brand: Thor Motor Coach
Model: Windsport 27B
State: Tennessee
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THOR #14933
Had a similar problem, if lci they have a nice electrical check manual online. From that you perform various voltage checks. My problem was similar to yours ended up being switch near motor. Also got good tech support from lippert.
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Old 09-21-2020, 02:02 AM   #6
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Brand: Thor Motor Coach
Model: Damon Daybreak
State: New Mexico
Posts: 107
THOR #19133
The step controller gets 12 VDC from the ignition switch, or a source that is only hot when key is on. If it worked before, and is malfunctioning now, the controller is likely bad. It's mounted to the underside of the step. You will need the step part number to get the correct controller.
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Old 09-22-2020, 07:13 PM   #7
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THOR #15030
Solution, hopefully

Trouble shot with Lippert support. Explained what the steps did and didn't do. Don the tech told me to check two voltages and in about 30 seconds told me it was the step controller. Ordered on today and will install it as soon as it arrives to confirm that he was correct.
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Old 09-22-2020, 08:53 PM   #8
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THOR #8860
The best of luck to you with this solution!
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Old 09-23-2020, 04:08 AM   #9
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Brand: Thor Motor Coach
Model: Miramar 37.1
State: Virginia
Posts: 35
THOR #12448
I second what Civrel said. Earlier this spring, we had it do the “steps go out when the ignition is on. Everything on ours operated fine otherwise. Wound up running the steps in and disconnecting the controller from the coach to get home. I did all the troubleshooting steps in the manual and everything checked out coming from the coach. Ordered a new controller and all has been well since it was installed.

Prior to that we also had a few times when the steps wouldn’t extend at all and it wasn’t until I had torn everything apart that it magically started working again. I’m still not sure whether that was the controller or maybe a dead spot on the motor. I’m hoping it was the controller and we’ve fixed both. Time will tell.
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Old 09-29-2020, 03:06 AM   #10
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THOR #19133
Make sure you lube the pivot points with lithium grease every 30 days of use.
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Old 09-29-2020, 01:46 PM   #11
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Model: Newmar Bay Star Sport 300
State: Alabama
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THOR #6826
Quote:
Originally Posted by HarryS View Post
Make sure you lube the pivot points with lithium grease every 30 days of use.


When I was fixing mine from underneath I discovered that there are WAY more pivot points under there than you notice from outside. I’d never lubed most of them and I do now.
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Old 10-03-2020, 10:29 PM   #12
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THOR #13629
I'm having problems where the steps were intermittent, and now don't work at all. Because they used to, I doubt its the wiring side. I plan on ordering a new controller and doing an r&r over the off season.
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Old 10-04-2020, 02:31 AM   #13
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Model: Damon Daybreak
State: New Mexico
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THOR #19133
First, make sure the door switch is making contact properly. Follow the Kwikee step troubleshooting to make sure what is wrong before throwing parts at it.
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