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Old 03-09-2015, 09:28 AM   #1
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Coach Step entry stairs

This is MichBill enjoying the sun in st. Augustine, FL. However, my stairs decided to stop working. We have a 2009 Monaco Dynasty Regal IV that we bought last July. I re leveled the coach yesterday and the stairs would not go back out. The OM said to check the fuses which I did and they are not blown. I'm not overly technical so I'm not sure where to go from here. I guess I should check if there is power to the motor but I'm not sure how. I can see the molex connector from the controller to the motor but not sure if that is were to check to see power there.
Also if I need to replace the motor I have seen that they are power window motors. How would I know what one to get? The motor number on the stairs is LCI PN 163669. The controler number is 164889.
Any guidance would be appreciated.
Thanks
Bill
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Old 03-09-2015, 09:46 AM   #2
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My stairs went dead so I replaced the motor, they died again in a few months. I read that the electrical plug between the motor and chassis wiring is the weak link, as recommended I unplugged the connection and slightly twisted the male ends (2) and reconnected. It's been over 2 years and no problems. I now have an extra motor.
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Old 03-09-2015, 10:24 AM   #3
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Do a search for step problems, there's been a lot of discussion about them. In fact, I just went thru the replacement 'exercise' and posted about it.

If you still have questions/issues, let us know.
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Old 03-15-2015, 01:45 PM   #4
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A good ground is very important in under coach environment. Lot of moisture and rust. The molex plug is another source of trouble. I doubt very much that the motor is bad. So, 1. Locate the ground wire, the wire that is screwed by itself onto a piece of the frame somewhere should be a green or possibly black wire. Remove it and sand or wire brush the frame area and the terminal. Reconnect and see if the step works. I bet it does. 2. If that didn't do it take the molex plug and twist it back and forth to scrub the terminals inside the plastic plug. Should be fixed now.


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Old 03-15-2015, 05:08 PM   #5
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'Stretch' has a good point about corrosion. Seems I rarely go poking around the coach wiring/connections these days without my trusty can of 'CorrosionX' handy.
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Old 03-15-2015, 06:54 PM   #6
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Bill I just replaced the step motor on our 99 Monaco Windsor the motor came from auto recycler and was off 2000 ford explorer all I had to do was install the spade plugs from the old motor there are posts here stating to use a window motor from a ford Taurus however it is different and requires a different style of electrical connection
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Old 03-16-2015, 07:40 AM   #7
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Thank you all for your information!
As I said in my post, I'm not real tech. So I contacted Lippert, the Coach Step people and their support people walked me through how to check if it is the motor or the controller. They had me disconnect the wire between the two and put 12 volt to the motor ( the only 12 volt source I had was the battery from my drill. It died quickly). In my case, the steps did go out. I will have to check with a better 12 volt source, so I can run them out and in a few times to make sure. They said because of that it is not the motor but most likely the controller. I have checked on-line and Lippert is actually the cheapest, $145 compared to 165 on eBay. I liked all the comments about the ground wire, twisting the wires and cleaning the contacts. I think I will do all of that before I order the new part.
Thanks to all. I will keep you posted.
Bill
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Old 03-17-2015, 08:17 AM   #8
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I thought I would update you all on the steps. I followed all the steps that Lippert, the Coach Step maker, said for troubleshooting (Their support people were great) , and it was not definitive. They suggested I get a new motor or controller.
I also followed all the great on this IRV2 Monaco forum. However, nothing was definitive.
While under there I noticed a wire that looked like it had come out of a butt connector. I figured I might as well fix it while I was there. It turned out that it was the wire for the magnetic door switch( I got a wire diagram from Monaco and traced it). I connected it and the steps now seem to work. I'll know for sure today when I re level, and the steps come in and then I put them back out ( this is what caused the problem in the first place). I ran them in and out yesterday with the step switch, opening and closing the door, and they worked. Keep your fingers crossed!
Thanks everyone for the great feed back!
Bill
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Old 07-04-2019, 05:39 PM   #9
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Congratulations on finding the issue and fixing it!
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Old 07-06-2019, 09:51 AM   #10
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Coach Step entry stairs

On our 3rd MH. I have always checked my steps. Lubricate, check el connections. During the 15 years (in three "A"s), have had problems with them all. Replaced wiring, controllers, magnets in door frame, wiring and motors. The last MH incountered the bulk the of problems. Tired of crawling into or out of the rig w/o any steps. Last mechanic replaced controller, then motor. Still not working.(he had ground and power) Told him to put back original parts, and put a rocker switch on he panel by the door. Now it is manual. Not the correct repair, but it works flawlessly. From the driver seat, I can see the red part of the switch, which tells me steps are out. If not red, steps are in. 4 years so far. I know that there will be comments about not correcting the problem correctly, and such. But that's my story and I'm stickin' to it!!!
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Old 03-24-2020, 04:25 PM   #11
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Quote:
Originally Posted by Long Island Mac View Post
On our 3rd MH. I have always checked my steps. Lubricate, check el connections. During the 15 years (in three "A"s), have had problems with them all. Replaced wiring, controllers, magnets in door frame, wiring and motors. The last MH incountered the bulk the of problems. Tired of crawling into or out of the rig w/o any steps. Last mechanic replaced controller, then motor. Still not working.(he had ground and power) Told him to put back original parts, and put a rocker switch on he panel by the door. Now it is manual. Not the correct repair, but it works flawlessly. From the driver seat, I can see the red part of the switch, which tells me steps are out. If not red, steps are in. 4 years so far. I know that there will be comments about not correcting the problem correctly, and such. But that's my story and I'm stickin' to it!!!
That’s a good idea.

My motor puked. I replaced it and all worked fine for several months, then it quit again. I put power direct to motor and it works. I had power to the module, but not to the motor. Replaced module but still not working. Checked the door switch and found I had power and continuity. So, it’s not the switch. I’m about to give up.
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Old 03-27-2020, 11:18 AM   #12
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Always fix the "Obvious" first. I used this term throughout my nearly 50 years of troubleshooting things. Something seemingly unrelated would be staring me in the face and I learned to go ahead and fix that instead of doing a lengthy troubleshooting chase.

It was amazing how many times something like that would solve the problems.

In the future as a suggestion use a jack to support the steps and remove the mounting bolts. Lower the assembly and take it out so you can safely use your own battery and are in a safe place to protect your fingers. While the steps are down inspect all of the bolts and brass bushings if it has them. Those things seem to disintegrate and I have seen bolts just shear off. Some fresh hardware, good clean grounds, perhaps a fresh paint job and the thing will be secure and safe again.
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Old 03-27-2020, 01:06 PM   #13
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I've had to replace the controller - in my case I had intermittent issues with the step not working after driving in wet conditions. I had taken it out, cleaned the connections, etc. to no avail.

Having said that, at one point it stopped working and I tested the magnetic switch for continuity, and it passed, but the problem is these new multi meters use such small current the test will pass a bad connection. The moment you put some actual current to it, the circuit that passed the multimeter test will suddenly balk.

Turned out that Monaco (in their infinite wisdom - can't say I'm surprised they went under) chose to put an unsealed butt connector in the wire about a foot from the switch, and since the switch is on the trailing edge of the door, it was hanging in the air in front of the front tire. All the muck and spray off the front tire hit the connector, and sure enough it was corroded to the point of failure.

New connector and a bit of heat shrink and it was good. Cost about fifty cents, but clearly that was too much for Monaco.
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