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02-27-2012, 04:00 PM
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#1
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Junior Member
Join Date: May 2011
Location: TX
Posts: 15
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Tow Veh. Lights
OK, I've tried now I need help!
How do I wire up the tail, brake and turn signals on my towed vehicle to work off the plug on my motor home?
I wired a trailer wiring harness into toad and ran to the front so I could plug it into the motor home. If I test the plug harness with a test light it is wired right but nothing works when I plug it into the motor home.
Will it not feed that direction?
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02-27-2012, 04:06 PM
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#2
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Senior Member
National RV Owners Club
Join Date: Jun 2010
Posts: 4,581
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Did you use a wiring kit with diodes? What year & model of you towed vehicle? Maybe someone who has the same towed vehicle can help you.
Safe Travels
Bob
__________________
 Bob & Sandi, dogs Tasha a Frenchie and Tiki a Skipperkey
SW OREGON 2005 34 foot DolphinLX
If towing: a bright red 2016 Mini Cooper on a tow dolly.
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02-27-2012, 04:15 PM
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#3
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Senior Member
Join Date: Jul 2011
Posts: 379
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You'll need a wiring/conversion kit for your car. Although it seems like it should be pretty simple, it is not. It took my Rv dealer about 3 hours to wire my GMC Terrain WITH the proper kit. I think they even had to contact the GMC dealer to get a few questions answered. Not sure it wouldn't be best to involve an experienced RV shop to do this for you. Good luck with whatever you decide to do!
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02-27-2012, 04:53 PM
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#4
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Junior Member
Join Date: May 2011
Location: TX
Posts: 15
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Veh Lights
Motor Home - Newmar
Toad Vehicle - Jeep YJ
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02-27-2012, 05:01 PM
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#5
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Senior Member
Tiffin Owners Club Freightliner Owners Club
Join Date: Feb 2008
Location: Pensacola, Florida
Posts: 5,173
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Hi Jhutch4044, welcome to the forum. I have the professional who puts on my tow brackets do the wiring. It's simpler that way and he has years of experience that I don't have.
__________________
Travel well, travel safe,
Jim
2006 Tiffin Phaeton - 2011 Cadillac SRX
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02-27-2012, 06:21 PM
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#6
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Senior Member
Ford Super Duty Owner
Join Date: Aug 2006
Location: Sahuarita, AZ
Posts: 255
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add seperate bulbs inside the lens, no diodes, no risk to toad.
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02-27-2012, 06:30 PM
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#7
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Senior Member
Newmar Owners Club
Join Date: Nov 2011
Location: Chattanooga, TN
Posts: 1,796
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Quote:
Originally Posted by Bagger97
add seperate bulbs inside the lens, no diodes, no risk to toad.
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That is what the dealer I talked to today to get pricing on setting my F150 up, add separate bulbs. No recourse from manufacturer in case of electrical problems with towed. 
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02-27-2012, 06:39 PM
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#8
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Senior Member
Appalachian Campers
Join Date: Sep 2002
Location: Dixie !! (north Georgia) USA
Posts: 4,114
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Motor Home - Newmar
Toad Vehicle - Jeep YJ
Magnetic lights
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02-27-2012, 06:45 PM
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#9
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Senior Member
Tiffin Owners Club
Join Date: Apr 2009
Location: Home in warm Sou Calif for the winter.
Posts: 1,401
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Quote:
Originally Posted by RSchleder
You'll need a wiring/conversion kit for your car. Although it seems like it should be pretty simple, it is not. It took my Rv dealer about 3 hours to wire my GMC Terrain WITH the proper kit. I think they even had to contact the GMC dealer to get a few questions answered. Not sure it wouldn't be best to involve an experienced RV shop to do this for you. Good luck with whatever you decide to do!
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You gotta be kidding me. It took me all of 1/2 hour to do my Terrain...very simple with diodes. I can't imagine taking 3 hours...
To the OP... have you checked your mh's electrical plug to insure that it is working and wired correctly? Do you have diodes install at the toad's tail lights? Are you sure you are connected to the proper wires on the tail lights?
If the signal is at the MH plug and you're wired correctly and if you have diodes to prevent back feeding into the toad's electrical system, it should work.
Ron
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02-28-2012, 05:30 AM
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#10
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Junior Member
Join Date: May 2011
Location: TX
Posts: 15
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No, I don't have diodes.
Where do they go?
Where do I get they?
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02-28-2012, 09:55 AM
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#11
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Senior Member
Tiffin Owners Club
Join Date: Apr 2009
Location: Home in warm Sou Calif for the winter.
Posts: 1,401
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If you don't want to buy the complete kit, you can get the diodes at Radio Shack. They are about 1" square and about 1/4" thick with two inputs and one output. Don't know how much they cost, but couldn't be much. You'll need four of them.
Hope this helps
Ron
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02-29-2012, 08:19 PM
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#12
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Senior Member
Gulf Streamers Club
Join Date: Mar 2011
Location: Central Texas
Posts: 3,797
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You can check in at ETrailer and they have both kits for wiring a toad. The one with diodes and the one with the extra bulbs that you fit into the rear brake light housing. I used their extra bulb set-up on my CRV toad.
ronspradley
__________________
'95 Monaco Windsor DP 32' Cummins 5.9
Toads '96 Tracker 4x4, '06 Honda CRV AWD
Life's too short to drink diet soda. 
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03-06-2012, 05:23 PM
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#13
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Senior Member
Join Date: May 2010
Posts: 1,061
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JHUTCH4044,
So, you are using stand alone magnetic lights. Then it should be easy enough to trouble shoot. Turn on the parking lights and check for voltage on the RV between the running lights pin and the ground pin on the same connector. Check for resistance on the magnetic lights between the ground and running light pins on the connector that mates up with the RV connector. One of these measurements should fail. Once you know which one failed, you know where to look for the problem.
__________________
Gil
03 Prevost H3-45
Hoffman Conversion
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03-06-2012, 05:33 PM
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#14
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Senior Member
Country Coach Owners Club Solo Rvers Club iRV2 No Limits Club
Join Date: May 2011
Location: Vancouver, WA
Posts: 37,725
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As ImagineIF says, it should be easy to troubleshoot in your case. I've done it many times. In one case I went to pick up our new TT and the salesman went to get a tech to do the wiring, by the time he got back I was wrapping everything up. He offered me a job on the spot. Don't think he was serious though.
__________________
2009 45' Magna 630 w/Cummins ISX 650 HP/1950 Lbs Ft, HWH Active Air
Charter Good Sam Lifetime Member, FMCA,
RV'ing since 1957, NRA Benefactor Life, towing '21 Jeep JLU Rubicon Ecodiesel
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