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02-25-2020, 03:27 PM
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#1
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Junior Member
Join Date: Jun 2015
Posts: 7
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Stop/Turn trailer lights don't work
On my 2013 Coachmen Mirada, all lights work properly on the RV itself, but suddenly the stop and turn lights don't work on the trailer output. The running lights work properly. All fuses and relays on panel by driver's left foot check ok. The RV has separate stop and turn lights, while these are combined for trailer output. On my truck, I had to install a piece of electronics that combined the stop and turn and separated the running lights to the trailer connector. I haven't been able to figure out how this is done on the RV, but that seems to be the most likely place for the problem.
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02-25-2020, 03:50 PM
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#2
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Senior Member
Monaco Owners Club
Join Date: Oct 2014
Location: Idaho Falls, Idaho
Posts: 3,685
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Do you have stop and turn at the receptacle on the coach where you would plug in the cable going to the toad?
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Cheers,
TonyMac
2006 Monaco Safari Cheetah 40PMT
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02-25-2020, 05:42 PM
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#3
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Senior Member
Join Date: Jan 2020
Posts: 1,231
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Since it sounds like it has worked previously and now it doesnt, have you checked the ground wire for frame connection on both trailer and at coach plug? Bad grounds allow for funky operations. Test light or DVM used at coach plug at all 4 pins on the trailer plug?
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2017 Fleetwood Bounder 36Y
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02-25-2020, 10:15 PM
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#4
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Senior Member
Join Date: May 2009
Location: Mariposa, CA
Posts: 3,851
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Happened to me too. After spending time in the shop looking for that bad ground or whatever, I decided to give the Tekonsha Modulite ZCI (Zero Contact Interface) a try. It works by induction so you don't "cut" into any wiring.
Long story short . . . the ZCI system works like a charm.
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2003 - 2010: 2004 35' National RV Sea Breeze LX 8341
2010 - 2021: 2001 41' Newmar Mountain Aire 4095
2021 - ???? : 2001 31' National RV Sea View 8311
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02-26-2020, 09:52 AM
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#5
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Senior Member/RVM #90
Monaco Owners Club
Join Date: Nov 2002
Location: Columbus, MS
Posts: 52,437
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Hi ! Welcome to IRV2! We're sure glad you joined us! 
It sounds like the converter that combines the turn signal and brake lights may be bad. Mine is right behind the connector on the MH.
Good luck, happy trails, and God bless!  
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Joe & Annette
Sometimes I sits and thinks, sometimes I just sits.....
2002 Monaco Windsor 40PBT, 2013 Honda CRV AWD
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02-26-2020, 10:01 AM
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#6
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Junior Member
Join Date: Jun 2015
Posts: 7
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Quote:
Originally Posted by TonyMac
Do you have stop and turn at the receptacle on the coach where you would plug in the cable going to the toad?
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No, only the tail light connection at the RV 7 blade connector has power.
Quote:
Originally Posted by US1
Since it sounds like it has worked previously and now it doesn't, have you checked the ground wire for frame connection on both trailer and at coach plug? Bad grounds allow for funky operations. Test light or DVM used at coach plug at all 4 pins on the trailer plug?
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Yes, I checked the ground. Also, with the tail lights working, the common ground has to be good.
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02-26-2020, 10:11 AM
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#7
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Junior Member
Join Date: Jun 2015
Posts: 7
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Quote:
Originally Posted by MSHappyCampers
It sounds like the converter that combines the turn signal and brake lights may be bad. Mine is right behind the connector on the MH.
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That's what I suspect also, but don't know where to find it on my Mirada/F53. BTW, the factory is no help. They just keep referring me to the fuse box. 
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02-26-2020, 12:23 PM
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#8
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Senior Member/RVM #90
Monaco Owners Club
Join Date: Nov 2002
Location: Columbus, MS
Posts: 52,437
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Quote:
Originally Posted by ccondos
That's what I suspect also, but don't know where to find it on my Mirada/F53. BTW, the factory is no help. They just keep referring me to the fuse box. |
Did you look underneath behind the trailer connection?
__________________
Joe & Annette
Sometimes I sits and thinks, sometimes I just sits.....
2002 Monaco Windsor 40PBT, 2013 Honda CRV AWD
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02-26-2020, 01:05 PM
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#9
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"Formerly Diplomat Don"
Newmar Owners Club
Join Date: Apr 2005
Location: Moorpark, Ca.
Posts: 21,921
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Quote:
Originally Posted by ccondos
That's what I suspect also, but don't know where to find it on my Mirada/F53. BTW, the factory is no help. They just keep referring me to the fuse box. |
Often, it's just bundled in the taillight wiring loom behind the bumper/back edge of the RV. It may be at one end or the other. You need to follow the loom from the trailer plug to both RV taillights.
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Don & Mary
2019 Newmar Dutch Star 4018 (Freightliner)
2019 Ford Raptor
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02-28-2020, 10:27 AM
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#10
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Junior Member
Join Date: Jun 2015
Posts: 7
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Thanks everyone. The RV is in storage, and as soon as I can, I'll look again for the converter. Worse case, I'll tap into the RV lights and install an aftermarket converter. I'm also replacing the original lights with LEDs, so I'll be in there anyway.
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02-28-2020, 12:05 PM
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#11
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Senior Member/RVM #90
Monaco Owners Club
Join Date: Nov 2002
Location: Columbus, MS
Posts: 52,437
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Quote:
Originally Posted by ccondos
Thanks everyone. The RV is in storage, and as soon as I can, I'll look again for the converter. Worse case, I'll tap into the RV lights and install an aftermarket converter. I'm also replacing the original lights with LEDs, so I'll be in there anyway.
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I seem to remember reading somewhere that some of those converters won't work with LED bulbs! 
__________________
Joe & Annette
Sometimes I sits and thinks, sometimes I just sits.....
2002 Monaco Windsor 40PBT, 2013 Honda CRV AWD
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03-10-2020, 01:01 PM
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#12
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Junior Member
Join Date: Jun 2015
Posts: 7
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After looking all over for a box that converts separate stop/tail and turn lights into combined, I gave up and added an aftermarket converter, tapping into the RV's light leads. Seems to work fine. A problem came up with trying to remove the RV lights to get to the wires - the idiots who installed them made the holes a tiny bit too small, then forced the old lights in, which made it impossible to remove them without messing them up. Good excuse to switch to new LED lights. Still had to slightly enlarge the holes to fit them in.
Thanks for everyone's help.
__________________
2013 Coachmen Mirada 35DL
Chuck and Susan. RIP - Toby and Gracie, our great dogs
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