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Old 06-09-2016, 12:02 PM   #1
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Wiring for Toad Lights from Motorhome messed up ?

On my M/H there is a trailer wiring plug that I presume came from the factory, it goes directly into the wiring harness. It has 4 wires
White- ground,
Green-park lights,
Red-left blinker,
Brown-right blinker.
all of these work individually but when you put on the brake, power only shows up on the left (red) blinker, the right (brown)side shows no power and therefore no right brake light.
I have tried tracing to the front and checking fuses but cannot find any fuses bad.
Does this make any sense, I am just scratching my head ??
How do I get the right brake light to work ?
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Old 06-09-2016, 12:35 PM   #2
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I will bet that you have separate brake and turn signal bulbs on the Coach.
This is the same as cars that have amber turn signals, and red brake lights.
The turn and braek circuits are separate.

In this case, you need a converter module. It connects to the RV Left/Right/Brake lights, and then combines them properly at the tow connector.

Trace the wiring from your 4pin plug, it should go to a small module before connecting to the coach.

Regards,

Dan
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Old 06-09-2016, 01:45 PM   #3
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I tried to Trace and they just disappear inside a large bundle of wires up along the frame and go all the way to the front. thanks.
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Old 06-09-2016, 05:54 PM   #4
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Strange, standard trailer wiring would be white = ground, green = right turn & brake, brown = running lights, red = left turn & brake. (Typically yellow is used for left side turn & brake lights).
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Old 06-09-2016, 08:52 PM   #5
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I realize this, and that is why I have been scratching my head so much. This is a 2002 Georgie Boy and I don't know if others have had this same issue or not. I guess I will have to buy a Converter and hardwire into the harness. thanks for your help.
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Old 06-09-2016, 09:27 PM   #6
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Quote:
Originally Posted by kiscart View Post
I realize this, and that is why I have been scratching my head so much. This is a 2002 Georgie Boy and I don't know if others have had this same issue or not. I guess I will have to buy a Converter and hardwire into the harness. thanks for your help.
You did not confirm if you have separate brake and turn bulbs.

Certainly sounds like it if only the turn signals work on the toad.

Dan
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Old 06-09-2016, 10:51 PM   #7
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I would disassemble that wiring a little farther back to see if it's been spliced a few times.
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Old 06-10-2016, 12:09 AM   #8
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Watch the lights on the motorhome. if the turn and brake use the same bulb, you have standard lights and no converter is required. Is the right brake light working on the motorhome?
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Old 06-10-2016, 05:04 AM   #9
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kiscart-

By your iRV2 profile I'll assume your 3302DS is built on a Ford F53 chassis.

Two caveats on the following advice:

1) A coach manufacturer can alter wiring as he pleases, and
2) I only have Ford documentation on CD for 2006 and 2007

On that last point, the Ford Body Builders Layout Books are online, and here is a link to the electrical information from the BBLB for the 2002 model year F53. It looks enough like what I have for 2006-2007 that I'm fairly confident in my information and advice given below.

Ford provides two connectors inside the left rear frame of the coach, in your case about six to eight feet from the end of the coach. Those connectors contain these signals:

Ford connector C405:
PIN FUNCTION
1 -
2 TRAILER LEFT TURN W/ BRAKE SIGNAL
3 BACKUP LAMP
4 TRAILER GROUND
5 TRAILER RIGHT TURN W/ BRAKE SIGNAL
6 INTERIOR LAMP FEED
7 TRAILER BACKUP LAMP
8 BRAKE LAMP FEEDS
9 -
10 PARK LAMPS, REAR
11 RIGHT TURN SIGNAL (ONLY), REAR
12 ELECTRIC BRAKE POWER

Ford connector C406
PIN FUNCTION
1 TRAILER RUNNING LAMPS
2 LEFT TURN SIGNAL (ONLY), REAR
3 LEFT TURN W/ BRAKE SIGNAL
4 RIGHT TURN W/ BRAKE SIGNAL

Everything is there to run both the coach and trailer lights. Although a converter may be present, I don't believe one is needed.

If it was I, I'd do what "Dutch Star Don" suggests and trace the wires from the two connectors to the rear, so I'd understand what's connected to what. That by itself should reveal the cause of your current problem. Then I'd replace the fragile-looking 4-wire connector with an RV-style 7-pin connector bolted to the hitch/bumper, using the correct wires from the Ford connectors. This will give you additional signal pins, including the 12V charge line and the "blue" trailer electric brake wire.

Finally, as an observation, when odd crossover effects occur it's often because of missing or poor grounds. Check to see if both the coach and towed vehicle/trailer wiring grounds are solid.

I'm willing to troubleshoot this with you over e-mail or telephone. If you're interested, send me a private message with your contact information.
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Old 06-10-2016, 06:48 AM   #10
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Sorry, here is a picture of the back, yes 2 different lights. I will crawl under again and see if there is some connections 7-8 feet from rear, Thanks for the help . I am converting over to tow a Equinox toad. That is what started this, and you know how it goes when you start one Job..it leads to more jobs. ken
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Old 06-10-2016, 08:48 AM   #11
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The previous owner probably did the wiring.

With what Mark posted you can get what you need out of C406 and chassis ground, no need for a converter.

Dan
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Old 06-10-2016, 09:33 PM   #12
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Thanks for all your help, this forum rocks..I found a loose wire in the fuse panel under the drivers side dash ( I suppose it got kicked or something ) Thanks to a senior member l1v3fr33ord1 who led me in the proper direction of tracing out the source. Thanks again all for your help.
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