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Snowman9000's avatar
Snowman9000
Explorer
Jun 08, 2013

Adding IGN hot feed to Kwikee steps

Present generation Kwikee steps have an ignition sensing wire. ***IF*** there is power to the Kwikee steps coming in on the red wire, and if the yellow ignition sense wire is connected to an IGN source, the steps will retract when the ignition key is turned to IGN.

***HOWEVER***, if there is no regular power going to the steps because (in my case) the house battery disconnect switch is OFF, the steps will stay out when the ignition is turned on. The Kwikee yellow ignition sense wire (unfortunately!) does not provide power to move the steps. It only signals the controller to move the steps if power is present via the normal source. I would like to add power to the red wire when the IGN is energized, so that the unit can retract the steps even if the house battery switch is off.

Obviously, one way would be to power the Kwikee controller at all times. I tested it and it draws 9 mA in the condition of powered, but controller switch off. If possible, I'd rather not add a draw to either battery.

Following is the Kwikee wiring diagram. Now, on my mini MH, when the engine is running, a solenoid connects my chassis and house batteries, to charge the house battery. Notice I said running, not simply IGN energized. Given that, would I be creating any problem by adding an appropriately sized and fused wire as shown by the dashed line in the diagram? I can't think of any issue other than it will, when the IGN is on and the battery switch is on, tie the two batteries together. But once the engine is running, they are already tied together by the solenoid as described above. So am I okay to do this?

16 Replies

  • Snowman9000 wrote:
    Chris Bryant wrote:
    Steps should always be powered by the chassis battery, never the house battery.


    But their wiring diagram shows a battery disconnect switch, which to me suggests the house battery.

    Is 9 mA much of a parasitic draw?

    Does your unit have a chassis battery disconnect? Most Class As do, and that's what the diagram is trying to show.

    Your step should be, and probably is, wired to the chassis battery.

    9ma is insignificant, but there should be a switch that ensures the step stays out while you are camped. This should eliminate the draw. If NOT, then add a switch.

    The draw you were measuring may have been the step light. It should go out soon after step operation or door closing.
  • How about putting in a 12 volt delay off timer of say 30 seconds? When it chops power "off" is "off".
  • Here's how my rig is wired from the factory: The Kwikee red wire is connected to the chassis battery through a 20 amp fuse and a relay. The relay is energized if either the ignition or house battery is turned on. The OR function is simply a wire-OR diode circuit. Besides powering the step controller, the same switched circuit powers the CO detector and slideout controller. The downside of this approach is that when boondocking the relay coil is always pulling out of the house battery.
  • Chris Bryant wrote:
    Steps should always be powered by the chassis battery, never the house battery.


    But their wiring diagram shows a battery disconnect switch, which to me suggests the house battery.

    Is 9 mA much of a parasitic draw?
  • Steps should always be powered by the chassis battery, never the house battery.
  • Good question - I too would like to know the answer
    I moved my K step power connection from the engine battery to the house battery bank several months ago. Had a few issues with other equipment after that connected to both the house system and the engine battery. Not sure why Itasca / Winny connectes the steps to the starting battery as compared to the house battery bank.

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