Cruzer

I believe that the Discovery is on a Freightliner chassis. Our '04 Allegro Bus was on a Freightliner chassis and we had issues with our parking/marker lights as controlled through the SmartWheel. The lights being simply controlled through a headlamps switch was not the case. It was a series of staged components. The headlamp switch connected to the SmartWheel's controller module. The Smartwheel's headlamps output then fed a plug-in relay in the fuse block that was located on the floor of the center console (on Tiffin's anyway). It was determined that the SmartWheel controller module failed so FL replaced it under warranty. In order to complete my trip I pulled the relay that fed the marker and tail lights and installed a jumper wire (it was a night driving trip) so that they would stay on and removed it during the day so that they would stay off. So, it could just be a faulty relay, rather than the switch. There are a number of identical relays in that fuse block. For testing purposes you can just swap a few around to see if the problem goes away (well, actually it'll migrate to some other circuit, like the fog lights ). If it does, then all you have to do is replace that relay. If not, then I'd look at the lighting switch. One other possibility. If you have a SmartWheel it could be the controller. If you don't have a SmartWheel you may have an ICC switch. The ICC switch is used to flash your clearance lights as a thank you when overtaking. It's possible that this switch could be shorting out within itself.

I installed a KVH L3 in-motion dome on my 2003 Suncruiser. It was indeed a 12 volt power supply, unlike my present KingDome which uses a 120 VAC to 12 VDC adaptor. So, the inverter shouldn't affect the operation of the dome. However, it may (and probably does) affect the operation of your satellite receiver, especially if it's a DVR which has a hard drive in it. I had no problems with my KVH L3 or my DVR however I ran it via a Xantrex Prosine 2500 inverter, which was true sine wave. I also had no issues with my alarm clock but then it was a 12 VDC model.