[ian1959]

Interesting. Now to find where the common module is. Pretty sure I'm 12V across the board, so shouldn't have that complication. Thanks for your input.

Hi there,
coach #1218 here in the UK, the control modules are in the electrical city bay on my coach, take off the panel which houses the fuses/switch overides and this will reveal the control modules, normally a wiggle around with the respective board fixes my issues, they are in banks of 4 which all slot into what looks like a large PC mother board, if this does not work I have swapped the module from another position, ( be sure you set the dip switches correctly) if they are not in the same possition.

Regards

Ian