Join Date: Apr 2004
Location: Round Rock, TX, USA
Re: trailer light wiring question
No way to "safely" know what's wired to where.... without having the bike to work on.
The easiest way is to rig up a FUSED "12Volt trouble light" that you can hook up to the NEGATIVE post of the battery and then you can "probe" each connector on the bike side..(yes, you'll probably have to lengthen the wires)
Just connect the FUSED lamp to the Negative battery terminal and with the other lamp wire touch each connector on the bike..while you have a bike function turned on. CAREFULLY so you do not touch more than the connector contacts.
Turn on the bike, then touch the connectors...
1- when the lamp lights, you have probably located "running lights"....
2- Write Down which connector it is.
Repeat the steps above for RIGHT TURN, LEFT TURN, BRAKE.
Don't forget, ONE of the connectors is probably "ground" or NEGATIVE side of the battery... so the light will NOT light on that one... As for the "other 2" connectors, there is no telling what they are for... I suggest you trace them out. They could be "constant power" to the trailer to run a trailer convenience light or brakes or.. who knows what the PO did.... That should do it.
Now, for the "trailer" part... if you can't trace the wires, you COULD rig up an external 12V battery, FUSED... then figure out which terminal on the TRAILER is GROUND... that goes to NEGATIVE post of battery.... then, carefully connect the FUSED wire to the POSITIVE terminal of the battery and CAREFULLY touch the other 3 connectors individually and document which LAMP on the trailer turns on.
Match the wiring on the trailer to the bike and go ride...
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