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Old 05-04-2016, 08:36 PM   #1
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Seneca tail light fuse location

I lost all the left side tail lights - turn, brake, and light. I've found 3 fuse boxes under the hood but none of these are for tail lights. The Freightliner M2 106 manual says the tail light fuses are usually mounted in a box aft of the cab on the left rail. Crawled underneath front to back and found nothing. Anyone know they are located?

Thanks in advance.
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Old 05-04-2016, 09:14 PM   #2
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Mine are right behind the driver's seat inside the cab under a Jayco-added carpet cover. Motor the driver's seat all the way forward. One screw removes the carpet cover and then things are exposed. You will find fuses and relays that feed the rear lights.

Be careful poking around, there are exposed 12-volt hot connections. Short something out and could be disastrous!
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Old 05-04-2016, 10:43 PM   #3
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Rob, thanks. I found them and all the fuses are OK. Everything is out on the left side only - brake light, turn signal, driving light. Only things left are relays and wiring. Note that all left lights on Jeep don't work when hooked up either...work OK otherwise.

Will make some help calls in AM and then call a pro.

Thanks again.
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Old 05-04-2016, 10:55 PM   #4
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Sounds to me like you lost the ground wire connection to that lamp assembly.
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Old 05-05-2016, 06:12 AM   #5
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Quote:
Originally Posted by WaltW View Post
Rob, thanks. I found them and all the fuses are OK. Everything is out on the left side only - brake light, turn signal, driving light. Only things left are relays and wiring. Note that all left lights on Jeep don't work when hooked up either...work OK otherwise.

Will make some help calls in AM and then call a pro.

Thanks again.
If various relays there have same part # perhaps try switching them around and see if problem "moves".
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Old 05-05-2016, 09:31 AM   #6
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Bill/Rob, I called Jayco and they were going to send out 2 light assemblies as a solution. Since I am electrically challenged I called a local shop in Silver City for help to test to see if there is power and if the ground is OK. I've crawled under the chassis to see if there was any obvious chaffing but none visible.
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Old 05-05-2016, 10:11 AM   #7
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It was a fuse. Guy from the garage pulled each fuse in box, I only pulled the ones labeled left. It appears the fuse list is upside down. Close enough 9n RV manufacturing. Lesson learned...check each fuse no matter how its labeled.
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Old 05-05-2016, 12:54 PM   #8
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Fuse in box behind/under driver's seat?

Now the question is "why did it blow"? Usually something precipitates a circuit oveloading, although "weak" fuses are not unheard of. Now that you know where it is I would recommend keeping a spare. If the same one goes again further troubleshooting is indicated.
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Old 05-05-2016, 10:28 PM   #9
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Rob, a bit of back story and resolution. The trouble started when the plug on the baseplate pulled loose. As it turned out, that event damaged the 6-pin connector on the cord. A small screw had dislodged internally and shorted the lights out. Bad installation by an authorized Blue Ox installer, Discount Hitch in Arlington TX...don't go there. I had the connector on the Jeep fixed, then discovered that the Seneca lights didn't work. Mislabeled fuse box fooled me but not the techs. With both ends fixed I decided to attach the cable to make sure everything worked. That's when they found that the cable had been damaged. Everything back in working order for a while.
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Old 05-06-2016, 06:21 AM   #10
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Makes total sense now. Glad you found an identifiable cause that was able to be resolved without too much fuss!
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