I have a 2016 Mercedes Sprinter
with a chassis mount camper. I recently towed a trailer which apparently had fault faulty running lights and now I have no tail, clearance, or license plate lights. The hazard, turn signal, and brake lights are working. I checked every fuse on the two fuse panels but all checked out as OK. After checking blogs online, I suspect the problem may be with the front (?) SAM. I'm pretty much old school on auto wiring and I know absolutely noting about them, how they work, if they can be reset, or even where to find them on the Sprinter.
JA: Have you checked the brake fluid? How's the level and when was it last changed?
Customer: The brake fluid canister if full with clean fluid. It is the original mfg fluid, which is about one year old.
JA: Are you fixing your Sprinter yourself? What have you tried so far?
Customer: I have only checked all of the fuses, which are OK. The lights were ALL working prior to connecting the bumper pull trailer with faulty circuitry.
JA: Anything else you want the mechanic to know before I connect you?
Customer: That is about it. Tomorrow I will disconnect the battery
to see if that will get something to reset.