Author Topic: Trailer Wiring  (Read 517 times)

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Offline Sport Rider

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Trailer Wiring
« on: August 27, 2017, 11:21:27 pm »
I need some electrical help from someone that has installed a light harness for a trailer...including hook up of turn signals.

ok...so I looked at the wiring diagram.  I thought I had it all right, but I've got no right turn signal.  I don't have turn signal on the sidecar either, so I think it's the same problem.

the harness for the trailer connector is the typical flat 4.  white is ground.  Brown for taillights.  yellow for left turn and stop.  Green for right turn and stop.

I used the red wire on the bike to brown.  The sidecar running light used this one too.  this works on the trailer.
I used the green from the bike to the yellow wire for the left turn signal.  this works.
I used the gray from the bike to the green for the right turn signal.  The sidecar uses this one too.

problem:  neither the sidecar nor the trailer has a right turn signal.

Have I used the wrong wire????
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Offline Ranger Jim

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Re: Trailer Wiring
« Reply #1 on: August 27, 2017, 11:38:19 pm »
Check the ground on the right turn signal.
JIM CULP
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Offline Sport Rider

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Re: Trailer Wiring
« Reply #2 on: August 27, 2017, 11:42:53 pm »
Check the ground on the right turn signal.

that would mean the ground on both the sidecar and the trailer were bad.  whatcha think?
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Offline works4me

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Re: Trailer Wiring
« Reply #3 on: August 28, 2017, 12:10:38 am »
Sport, I went out to the garage so I could check
my wiring.
I found it to be the same as yours.
Have you checked voltage at the converter
to be sure it's working properly?

Offline Sport Rider

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Re: Trailer Wiring
« Reply #4 on: August 28, 2017, 12:49:19 am »
Sport, I went out to the garage so I could check
my wiring.
I found it to be the same as yours.
Have you checked voltage at the converter
to be sure it's working properly?

the turn signal on the bike is working fine both front and rear.  it just seems to be the wiring going to the sidecar and trailer that isn't.  Very puzzling.  I suppose it might be possible that both bulbs are out.  I'll have to double check them.
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Offline dboogie2288

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Re: Trailer Wiring
« Reply #5 on: August 28, 2017, 02:16:49 am »
Are you using a isolator/converter device?
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Offline Sport Rider

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Re: Trailer Wiring
« Reply #6 on: August 28, 2017, 10:26:10 am »
Are you using a isolator/converter device?

I isolated the wire and converted it two a second one for the trailer.  does that count?   :))

no devices of any type......
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Re: Trailer Wiring
« Reply #7 on: August 28, 2017, 10:43:22 am »
The turn and the brake are two separate wires on the bike they aren't on the same line
I had to run a seperate wire for each
IIRC
White ground
Brown Right turn
Yellow Brake
Green Running
I maybe off on the colors but other than the white being the ground This works with my rig
If your wiring up the trailer to run stop and turn off the same bulb you will need a converter to go from separate turn/brake to combination turn brake Check the local auto parts place they may have one of these
I have no idea about anything.
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Offline Sport Rider

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Re: Trailer Wiring
« Reply #9 on: August 28, 2017, 11:29:07 am »
thanks for the link.

Packet with the plug says:
White - Ground
Brown - tail lights
Yellow - left turn and stop
Green - Right turn and stop
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Offline Ranger Jim

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Re: Trailer Wiring
« Reply #10 on: August 28, 2017, 11:48:17 am »
You  wired the trailer and the sidecar, right? Try running a separate ground just to check. Most of my wireing problems always track back to a bad ground or a bulb.
JIM CULP
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Offline dboogie2288

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Re: Trailer Wiring
« Reply #11 on: August 28, 2017, 01:03:23 pm »
Unless I'm missing something, you're missing a part - the convertor as posted earlier.

You have basically a flat 5 system if you were to just tap into the wiring as it sits on the bike. You have to have something that converts the turn signals down into sharing a wire with the brake.....thus eliminating one wire and giving you flat 4.

I have flat 4 on the bikes. I had to rewire my timeout camper for it, but that was no big deal. I prefer having the same standard on all the machines and trailers so anything can go anywhere on any bike.
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Offline Sport Rider

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Re: Trailer Wiring
« Reply #12 on: August 28, 2017, 02:04:56 pm »
You  wired the trailer and the sidecar, right? Try running a separate ground just to check. Most of my wireing problems always track back to a bad ground or a bulb.

I didn't wire the trailer.  sidecar installer did.  however, the turn signal on the sidecar has never worked although the brake and running light does.
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Re: Trailer Wiring
« Reply #13 on: August 28, 2017, 04:44:33 pm »
Question On the sidecar is the turn signal separate from the brake/running lights
I have no idea about anything.
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Offline Sport Rider

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Re: Trailer Wiring
« Reply #14 on: August 30, 2017, 11:55:09 am »
Question On the sidecar is the turn signal separate from the brake/running lights

yes.  separate amber light.  or at least the plate covering it.  I think you can see it on this one.
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Offline dboogie2288

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Re: Trailer Wiring
« Reply #15 on: August 30, 2017, 12:27:26 pm »
So it sounds like you should have a tap for hot and ground from the right hand turn signal to the amber. Then you also need run/brake/ground going to the red. Since the wiring coming out of the converter will only account for RED lenses....it wouldnt tap it from there. I'd check the wiring. Did the side car EVER work properly? 12V wiring is incredibly simply...especially since you basically just need to tap into the right things. I would check your source wiring first, it may just need to be re-tapped into the right circuit.
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Re: Trailer Wiring
« Reply #16 on: August 30, 2017, 02:18:40 pm »
This is how I would wire all this


Bike                   Sidecar             into converter   from converter           Trailer
Ground-----------Ground----------Ground*             Ground----------------ground
Running----------Running---------Running              Running---------------Running
Brake-------------Brake-----------Brake                  Rt turn/Brake---------Rt turn/brake
Rt turn------------Rt turn---------Rt turn                Lt Turn Brake----------Lt turn/brake
Lt turn-----------------------------Lt turn
*Converter may or may not have a ground wire going thru it
I have no idea about anything.
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Offline dboogie2288

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Re: Trailer Wiring
« Reply #17 on: August 30, 2017, 04:59:02 pm »
This is how I would wire all this


Bike                   Sidecar             into converter   from converter           Trailer
Ground-----------Ground----------Ground*             Ground----------------ground
Running----------Running---------Running              Running---------------Running
Brake-------------Brake-----------Brake                  Rt turn/Brake---------Rt turn/brake
Rt turn------------Rt turn---------Rt turn                Lt Turn Brake----------Lt turn/brake
Lt turn-----------------------------Lt turn
*Converter may or may not have a ground wire going thru it

^^^ Yep this looks good. Converter WILL have ground.
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Offline Sport Rider

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Re: Trailer Wiring
« Reply #18 on: August 31, 2017, 02:10:03 pm »
This is how I would wire all this


Bike                   Sidecar             into converter   from converter           Trailer
Ground-----------Ground----------Ground*             Ground----------------ground
Running----------Running---------Running              Running---------------Running
Brake-------------Brake-----------Brake                  Rt turn/Brake---------Rt turn/brake
Rt turn------------Rt turn---------Rt turn                Lt Turn Brake----------Lt turn/brake
Lt turn-----------------------------Lt turn
*Converter may or may not have a ground wire going thru it

^^^ Yep this looks good. Converter WILL have ground.

best I can tell from wiring diagram is that he gray is the right turn signal.  that does not seem to be working at the sidecar with my current wiring setup.  This was done at the shop.  I will double check the wiring diagram for the sidecar though.  perhaps it's connected to the wrong sidecar wire.  however, the right turn does not work on the trailer and the left one does.
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Offline dboogie2288

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Re: Trailer Wiring
« Reply #19 on: August 31, 2017, 04:10:51 pm »
Being that we aren't there, it's hard to diagnose.....I would suggest stripping down ALL wiring, and start fresh with that info above.
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