Originally Posted by yvonjovi
This is our second class B and brand new but we're having trouble with electrical dash lighting and chasis battery. It's been like this from the time we drove it off the lot. We've asked the dealership who said the problem was with the conversion and the conversion said it was a dealership warranty issue. We don't care we just want this fixed!
We've had an electrical diagnostic done from an independent shop and have narrowed down the problem to wiring and were advised to try a Mercedes shop.
The first problem: Starting the ignition causes the dash lights to go out when the headlights are turned on. With the engine off, the dash lights come on as long as the headlights are turned on.
The second problem: Another electrical issue is with the conversion installed sony cd/dvd/radio/stereo system which drains our chasis battery even though we have switched over to the coach battery.
Although we'd like to think these are related, our regular mechanic says not. He thinks it's an isolation block issue and not related to the headlight/dash issue.
Please help as we would like to drive a night without a flashlight!
Your van is a Mercedes Benz Sprinter but in the United States, whether it is badged Dodge or Freightliner, it is serviced by Five Star Dodge dealers equipped to handle Sprinters. A Mercedes Benz auto dealer will not touch it.
Your first problem about the headlights might just be an understanding issue because I doubt LTV changed anything to their function. The Sprinter headlights are on all the time and driving into the night you can forget that it is only in running light mode until you notice you have no dash lights. To get dash lights to come on you have to switch over to night headlights. That's a counter clockwise twist of the stem. In running light mode the stem lines up. In running light mode, the lights go off when you turn the ignition off. In headlight mode you have to manually turn your lights off as they do not go off with the ignition. All that should be in your Sprinter manual not LTV's manual.
Your second problem. The radio/CD in your dash runs off the chassis battery. If LTV installed a cd/dvd/radio in the back of your coach it will run off your coach battery. I'm not sure how it would drain your chassis battery. It could be something else doing that.
Regardless, it sounds like you have two separate issues. If there is truly something amiss about your headlights that would be a Dodge dealer problem. The coach dvd/cd/radio installed by LTV would be an RV dealer problem to solve but if it is not related to draining your chassis battery draining then it is back to the Dodge dealer.