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Old 09-12-2018, 11:14 AM   #1
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Headlights (only) quit working

I have a 2004 Winnebago Ultimate Advantage 40KD and suddenly all 4 headlights quit working, both high and low beams. All other exterior lights are operating properly and I'm having no other electrical issues. Can anyone tell me where the fuse or breaker (or whatever) is located? I've checked the manual(s) and have not found the location of these parts. Any help is appreciated.
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Old 09-12-2018, 01:44 PM   #2
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What chassis is the RV on? Headlights should have fuses in the chassis fuse panel. It's not usual for all 4 lights to be on one fuse, so I'd suspect either the light switch on the dash or a relay that handles the large amp load of the headlights. Again, chassis information is needed to be more specific.
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Old 09-12-2018, 05:56 PM   #3
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Spartan

It is on a Spartan chassis. I suspect the light switch on the dash is the problem but for future reference wanted to know where the other possibilities were on the chassis.
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Old 09-12-2018, 06:29 PM   #4
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Most every Spartan bus or RV I've seen has an electronics compartment in front of the front right tire. Look in there for circuit breakers or fuses that control all chassis/driving functions.
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Old 09-12-2018, 08:17 PM   #5
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There is an electric compartment inside the door just forward of the driver's side front tire. The labeling in there leaves a lot to be desired. Inside there is a
metal panel blocking my view of the fuses that is not shown in the owner's manual. There are lots of fuses and plug-ins so I am reluctant to start pulling fuses to see what shuts down.
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Old 09-12-2018, 08:30 PM   #6
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There is an electric compartment inside the door just forward of the driver's side front tire. The labeling in there leaves a lot to be desired. Inside there is a
metal panel blocking my view of the fuses that is not shown in the owner's manual. There are lots of fuses and plug-ins so I am reluctant to start pulling fuses to see what shuts down.
As long as you pull one fuse, check what's out, then re-install the fuse, I don't see a problem. I've done it on every RV, boat, and home I've ever owned to map out the circuits. Better when I want to learn and document than in the middle of the night.
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Old 09-12-2018, 09:42 PM   #7
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Check your smart wheel contoller.

Had a similar problem so a call to spartan helped me find the smartwheel ( in the fuse compartment in front of wheel under drivers seat )component and they gave me the sequence to unplug and reconnect the plugs. I think it was large black, medium black, small black, large white, medium white and small white. Wait a moment and re plug the wires in the reverse order.
Check with spartan to make sure. This worked for meon two occasions, good luck
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Old 09-12-2018, 09:52 PM   #8
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I don't know about the spartan, But most headlights are powered through a separate wire from the battery, and a circuit breaker inside the headlight switch. It used to be a federal law, that they had to be separate, and through a self resetting circuit breaker.All the rest of the lights, should go through the fuse block, and have a separate route for power from the battery.
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Old 09-13-2018, 05:28 AM   #9
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If they are automotive fuses they can be checked without removing them if you are reluctant to do so.
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Old 09-13-2018, 09:23 AM   #10
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If they are automotive fuses they can be checked without removing them if you are reluctant to do so.
You are right, but that doesn't reveal what the fuse protects and also doesn't cause the contacts to rub against the holder to 'clean' them a bit. I prefer to pull them, check for dirty contacts, and clean them if needed.
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Old 09-13-2018, 12:59 PM   #11
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Thanks everyone for the leads, I'll let you know how it all works out.
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Old 09-14-2018, 02:23 PM   #12
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The cause of our headlight failure turned out to be a "Thermal Event" of the SmartWheel.
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Old 09-14-2018, 04:20 PM   #13
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Thats scary.
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