I'm a firm believer in the "Daniel Stern" fix recommended by DSDP Don. Many coach builders use "off the shelf" chassis and the wiring is inadequate. On my previous coach, a '97 HR endeavor, there were at least a couple of extra feet of wiring for the headlights to allow the coach builder some flexibility in the headlight placement. This extra wiring and its small gage caused the voltage at the headlights to be at least a volt below the battery voltage, causing the lights to be dim. You have to measure the headlight voltage at the connector at the back of the light with the headlight connected and on. You may have to insert a small wire into the connector to be able to contact it with a voltmeter. As I remember, you can get a kit from Stern, or, if you are handy, you can buy the parts at your local auto parts store.