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Old 12-22-2014, 02:02 PM   #1
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Marker Lights Out

I have a 2009 Winnebago Access and all the marker lights are out. Headlights, brake lights, 4-way hazards, and turn signals are OK. There are chassis fuses on the cab floor above the brake pedal, some reset buttons on one of the storage compartments, and fuses at the power center in the coach. I can't tell from labels if any of these are for the marker lights and tail lights. Anyone know what to try?

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Old 12-22-2014, 06:34 PM   #2
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All I can offer is; over 90% of all 12VDC electrical problems are related to poor grounding.

2000 Winnebago Ultimate Freedom USQ40JD, ISC 8.3 Cummins 350, Spartan MM Chassis. USA 1SG, retired;PPA,Good Sam Life member."We the people are the rightful masters of both the Congress and the Courts - not to overthrow the Constitution but to overthrow men who pervert theConstitution. "Abraham Lincoln"
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Old 12-23-2014, 06:54 AM   #3
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Lots of chassis manufacturers tie the chassis marker light circuit and trailer marker light circuit together.

It's a good idea, one less circuit and the added convenience / safety factor of knowing when your trailer markers are out because you can see the chassis lights are out in the rear view mirror.

Often that circuit is in a different fuse box, under the hood in the case of a Ford chassis.
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Old 12-23-2014, 01:38 PM   #4
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Check the obvious first. If no light on either side trace line to jut before the branch and test for continuity. Then go back half way until u find the short. Mine did same thing found a broken wire by front drivers side door in 30 minutes. Stripped it out it back and put shrink tubing on it works fine now
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Old 12-24-2014, 06:24 AM   #5
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Did you actually check the fuses using a test light? Turn the key on (engine off), turn on headlight/running light switches and then with a grounded (ensure a good ground) test light, probe each and every fuse. At the shop I work at, this is always the first step we do with any lighting problem and it usually solves a lot of lighting problems.
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