I was just looking to replace the bulbs. I'll bust out a volt meter and check what is available at the plug connected to the lights. Taking my first "trip" with the RV tomorrow, mother-in-law's 88th birthday, 120 miles there, 120 miles back. Probably stay overnight but not sure the RV will fit in her driveway or if I can park it on the street there. I have a friend fabricating a mount to clamp on the frame cross member, didn't want to drill anything, mount is for air horns. I didn't want to mount on the roof, the opening on the passenger side of the batteries is exactly right for the Hadley air horns. I don't want to tap off the existing air system the suspension and brakes use, adding a compressor and take dedicated to the horns.