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Tail lights and backup lights will not work. May have a fuse…

Customer Question
Tail lights and backup...

Tail lights and backup lights will not work. May have blown a fuse or some other component by plugging into a trailer with damaged wiring.

Mechanic's Assistant: Have you checked the bulbs? Have you checked the connection?

All bulbs went out at same time - caused by plugging trailer into 7-pin factory trailer harness.

Mechanic's Assistant: What is the model/year of your Mercedes?

2014 Sprinter 3500. It is a Coachmen Prism Class C motorhome. Coachmen says they have no fuses in the running lights or backup lights circuits.

Mechanic's Assistant: Are you fixing your Sprinter yourself? What have you tried so far?

Yes I'm 100 miles from service, and I've just tried inspecting fuses under left from and left driver's seat. All appear OK.

Submitted: 8 months ago.Category: Mercedes
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Answered in 16 hours by:
9/27/2017
Mercedes Mechanic: Lou P. master tech, Mercedes Technician replied 8 months ago
Lou P. master tech
Lou P. master tech, Mercedes Technician
Category: Mercedes
Satisfied Customers: 5,893
Experience: 20 years Master Certified excellent fix rate and have access to factory wiring, and instructions.
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Hello, my name is***** and i will do my best to assist you.I am going over your story now and will reply back soon with some info,thanks!

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Mercedes Mechanic: Lou P. master tech, Mercedes Technician replied 8 months ago

Hello Rick , may I have your vin and build date on the drivers door sticker?

I will need those to pull up the proper wiring diagram to help you.

Thanks, Lou

on a side not you have fuses under the drivers side seat and also under the dash that will have the lighting fuses in them,

Lou

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Customer reply replied 8 months ago
Cancel my inquiry. I solved the problem. The blown fuses were, as I suspected, in a satellite compartment at the rear of the vehicle - four screws removed a cover plate over fuses and wiring bundle plug-ins for all rear lights. As far as I can tell this fuse block is a Sprinter chassis standard, but placed by Coachmen RV as they built the coach. Neither MB Sprinter nor Coachmen RV knew this compartment existed. I found it myself by tracing wires, and found two blown fuses.
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