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Old 08-18-2014, 11:31 AM   #1
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07 Endeavor Headlights Died

Last night we were coming home from a race in Seattle. Got dark about 45 miles from home an I noticed it wasn't very light in front of the motor home. We pulled off the freeway at the Clark County Wash. fairgrounds exit and sure enough, we had no headlights. High and low beams were both non functional. I know for a fact they were working on our way to the race a couple days before.

I spent 2-1/2 hours checking (and cussing) every circuit I could find that seemed to relate to the headlights. High and low beam fuses are good. Relays are good. The high beam indicator on the dash works. Best I can tell the headlight switch works right. The fog lights work, which they can't if the headlight switch isn't on.

I finally figured out I could jumper the fog light wires over to the low beam wires with a Scotch Lock connector, then unplug the fog lights so I had low beam headlights to get us home.

Anybody ever encounter this situation on a Monaco coach and if so what was the cause (and fix)?
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Old 08-18-2014, 03:07 PM   #2
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F21 in the small fuse panel below the driver, outside compartment.

I will attach a picture after resizing it.
Attached Files
File Type: pdf Front small fuse panel partial.pdf (943.7 KB, 132 views)
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Old 08-18-2014, 05:16 PM   #3
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Thanks Myron. In my "dilema" last night I didn't see that fuse.

That said, it didn't fix the problem. The fuse was good but we replaced it with two new ones today just to make sure.

I also checked the terminals for the F21 with my digital volt meter and there's definitely power going to it.

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Old 08-19-2014, 11:16 AM   #4
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I had my headlights go off intermittently and finally found a loose ground connection. There was a stud welded to the frame near a large bundle of wires and therefore mostly hidden, so it took a while to find it. The nut had come loose, and the wire made contact sometimes and not others. Carefully trace the ground wire from your headlights back to the chassis ground and see if that isn't the problem. Good luck. It's a very frustrating failure....
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Old 08-19-2014, 12:45 PM   #5
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Not likely a ground since you powered the lights via the fog lamp circuit. However it is always a good idea to measure the voltage on the lamps directly.

I am attaching two more schematics now that should further your search. Assuming you have the smart steering wheel it comes into play.
Attached Files
File Type: pdf Headlight schematic.pdf (49.9 KB, 102 views)
File Type: pdf Headlights etc.pdf (88.6 KB, 92 views)
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Old 08-19-2014, 12:56 PM   #6
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38061599 (DIAGRAM, SMART WHEEL).pdfSmart wheel schematic if you have this option.
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File Type: pdf SmartWheelTroubleshooting.pdf (331.0 KB, 61 views)
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Old 08-19-2014, 09:57 PM   #7
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Well, I've eliminated a few more possible problems but still no solution. Maybe tomorrow. Thanks YC1 for the wiring diagrams, big help.
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Old 08-20-2014, 04:44 AM   #8
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This may not be of much help, but here goes anyway:

We have an 07 Diplomat which is close to identical to your model. When ours was new we got stuck in traffic on the freeway and for the first time we had to put on the headlight. It turned out that headlights wasn't working and we got stuck in a truck stop.

We called the Monaco emergency number and "someone" took us through all the very obvious steps - did you turn on the lights? - did you check the fuse? - and so on. We ended up not solving the problem.

A few days later we arrived at Elkhart, IN where we was scheduled for "new RV repair", and we listed the missing headlights. We didn't see exactly what the tech did, but his explanation was something along the lines of: "Well - there are a small switch that you can flick in the large fusebox that is in the outside compartment under the drivers seat. That switch was flicked to the wrong side when the RV left the factory".

I am not able to verify his story because I didn't see him do it, and I also didn't see the location, but that was what we were told. I wish now that I had asked questions, but in 2007 we were close to being "RV virgins" and I was already confused about faults a lot simpler than this, so I didnt.

Good luck hunting.
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Old 08-20-2014, 03:14 PM   #9
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FOUND IT!!!!!!!!!!

Thanks Myron for the headlight wiring diagram.

There is an "inline" blade style fuse holder that supplies power to the 2 headlight relays. I would have NEVER found it without the wiring diagram. From the outside it just looks like a 2 prong Packard style connector and it's buried under a large wire loom.

With the wiring diagram I was able to determine it was actually the 12V feed to the headlight relays. Pulled it apart and Viola, there was the fuse.

Now I get to re-assemble everything I took apart the last 3 days.

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Old 08-20-2014, 10:37 PM   #10
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Glad you found it. Any chance you could post a picture of it so I can save for future reference. If not can you be more specific on the location please. I add notes to my schematics.
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Old 08-20-2014, 11:16 PM   #11
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Yep, I'll post a picture or 2 tomorrow.

As it says at the bottom of the wiring diagram, Monaco changed the wiring when they added the VIP 211 Smart Wheel unit. I think they used up all the left over fuse boxes and just Mickey Moused in the required headlight relays.

Anyone with an 06 or 07 Monaco coach should add this information to their owner's manual. Maybe they won't get stranded.

BTW, what with all the "fiddling" I did with the wiring and instrument cluster now my Aladdin reads all zeros. Can't win!!
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Old 08-21-2014, 04:37 PM   #12
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Here's a picture of the headlight relay fuse holder, which plugs into the receptacle (the little black plastic thingy held down by a hex head sheet metal screw) behind it. There are no markings on it and no mention on the back side of the cover or in the owners manual.

Monaco added this wiring and fuse holder to the Smart Wheel equipped coaches when the SM211 VIP Module was implemented in 2006.

Everyone that owns a 2006 or newer Monaco coach should print out the wiring diagram (thanks again Myron) and this picture and keep them available in the front run bay fuse box.

There is also a headlight fuse in the smaller box mounted below but that one was not blown.

The white wire (along with several others) goes through a hole in the upper left of the fuse box and supplies power to the high and low beam relays, which are mounted outside the box as an afterthought.

It appears that Monaco needed to use up remaining stock of circuit boards, which had no provision for the relays or fuse.



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Old 08-21-2014, 06:51 PM   #13
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Thanks for the picture. I suspect you are right about them using up the old boards. My 2008 has onboard relays. It appears the schematics are ok but component placement is in question. A simple label would have made things nice. These monsters are so complex I am amazed more folks don't get stranded. I have been studying the schematics since buying our 08. I'm an Electronic Tech and it has taken a lot of time for me to come to grips with the systems. Forty years in the business
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