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MB Paul
MB Paul, Mercedes Technician
Category: Mercedes
Satisfied Customers: 3567
Experience:  Qualified Mercedes Benz Diagnostic Technician - 20+ years experience - Workshop Foreman for Mercedes
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My new boat trailer lights won't work when plugged into my

Customer Question

My new boat trailer lights won't work when plugged into my '09 ML350, but they do work when plugged into my friend's Chevy truck. Does my vehicle have a fuse that could knock out the power through the receptacle?
JA: Just to clarify, what are the exact lights you're talking about?
Customer: All of them (running lights & tail lights) on a (small boat) trailer.
JA: Are you fixing your ML350 yourself? What have you tried so far?
Customer: Nothing other than trying to see if the rig works plugged into another vehicle.
JA: Anything else you want the mechanic to know before I connect you?
Customer: Just if there is a fuse that could be the problem. Or a ground issue.
Submitted: 1 month ago.
Category: Mercedes
Expert:  Mechanic01 replied 1 month ago.

Hello my name is ***** ***** welcome to just answers! I will be assisting you with all of your vehicle questions today. Give me one moment while I review your question and come back with a answer. Please be aware I do not know your skill level or abilities so I will be asking a lot of questions and in a lot of cases we will respond to each other quite a lot before we find a solution. As far as phone calls are concerned that is the system prompting you, not me, and they do cost more money, I prefer text but in some cases a phone call is required. If I don’t answer right away or quickly in conversation I am helping another customer or have stepped out for a moment and will respond as soon as I can. Ok lets get started!

Expert:  Mechanic01 replied 1 month ago.

ok so do you have a volt meter to check the system with?