Join Date: Sep 2016
Location: Costa Blanca Spain
My Motorhome: I drive... Hymer B550 Skyline
Thanked 36 Times in 36 Posts
No reply so far. I'm wondering whether your steps are the ubiquitous Thule variety, in which case a circuit diag can be found on the Thule website for double steps.. Ignore the foreign language and proceed to the very end.
In a nutshell.... 12v from the ignition switch to lamp and/or buzzer on one side, then other side to earth line towards microswitch above the steps. No fuse, no relays unless its the automatic variety.
Steps up: microswitch operated, earth line broken, lamp out.
Steps not fully up: microswitch released, earth line made, lamp lights.
With ignition /motor running, and steps down, you should find chassis earth on the line going to the microswitch. from the dashboard.
This line should go to 12V when the steps are fully raised and the lamp should go out, with 12V each side of it so nothing to drive it.
I hope that makes some sort of sense !