wireing color codes for 650 GT
- Thread starter David C
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TwoPort
Member
From Web Bike World:
BMW Wiring a BMW Scooter Top Case
(January 29, 2013): Here is a good tip from scooter owner "E.R." on wiring the BMW top case for extra tail lights:
"First of all I really appreciate your C650GT blog, particularly since there are no very active English-language forums on it; it's kind of a black sheep bike.
Anyway I bought one a couple of days ago and hooked up a top case with running/brake/turn lights, as well as satellite radio, so I have some input for anyone looking to hook into the bike's wiring. This is specific to the GT but the Sport is very likely similar.
Open the seat and pull off the foam; it's not attached to anything and can be simply pulled out. On the right side you'll see two Torx bolts and a black Phillips-head quick-release fastener. Remove these and the right rear fairing will easily pop out. This exposes the wiring that goes to the rear lights.
You'll see a plug, and behind it are five wires in regular insulation (and not the woven tape that is used in most places). This insulation is very easy to cut off to expose the wires.
You'll see five wires; the colors are as follows: brown = ground white = running (12V when the bike is on, 0V otherwise) red = brake (12V when either brake is applied) green = right signal (alternates between 12V and 0V as the signal blinks) yellow = left signal (likewise). So that's pretty much every wire you'd need for most things (still don't know how to access the headlight wires though).
BMW Wiring a BMW Scooter Top Case
(January 29, 2013): Here is a good tip from scooter owner "E.R." on wiring the BMW top case for extra tail lights:
"First of all I really appreciate your C650GT blog, particularly since there are no very active English-language forums on it; it's kind of a black sheep bike.
Anyway I bought one a couple of days ago and hooked up a top case with running/brake/turn lights, as well as satellite radio, so I have some input for anyone looking to hook into the bike's wiring. This is specific to the GT but the Sport is very likely similar.
Open the seat and pull off the foam; it's not attached to anything and can be simply pulled out. On the right side you'll see two Torx bolts and a black Phillips-head quick-release fastener. Remove these and the right rear fairing will easily pop out. This exposes the wiring that goes to the rear lights.
You'll see a plug, and behind it are five wires in regular insulation (and not the woven tape that is used in most places). This insulation is very easy to cut off to expose the wires.
You'll see five wires; the colors are as follows: brown = ground white = running (12V when the bike is on, 0V otherwise) red = brake (12V when either brake is applied) green = right signal (alternates between 12V and 0V as the signal blinks) yellow = left signal (likewise). So that's pretty much every wire you'd need for most things (still don't know how to access the headlight wires though).
I've gotten the right rear panel off, no problem. I don't see any plug as you mention. I see harness with a lot of wires in it, and took off some of the black sticky wrapping, and can't seem to find any white, green or yellow wires, for run and turn signals. There are, two brown, a grey w/yellow dashes about an inch apart, a green/purple, a grey and red w/ yellow dashes about an inch apart, and a dark blue w/ red stripe, and a dark blue w/ black stripe, both have light blue dashes about an inch apart. I don't see any plug as you describe. this is seven wires. I can't seem to find any way into the back of the actual tail light its self. wonder if there was a change back there from previous models. mines a 2016 GT. any chance you could send me a pic of where you're seeing these 5 wires? It's getting me really puzzled. Thanks, Dave C.
Last edited:
TwoPort
Member
If I remember right, more to the front it was a bigger bunch of wires - a connector that splits some of the wires; There are two "sections" of the cabling before and after the plug/harness. I tapped into the smaller section that branches off to the rear. Mine is a 2013 - I wonder if the colors changed. Wouldn't surprise me.
bicyclenut
Member
I wired in an Admore SMT lighbar using these notes for wiring colors that run under the right rear panel:
Running down right rear side of bike from a connector are 2 sections of wires:
Wrapped in fabric like electrical tape:
Red/white = always on 12v, direct to battery, for underseat optional power outlet.
Brown= ground for power outlet.
2 other wires, I didn't note colors, I assume powered on by key, 12v power and ground for license plate light.
2 more wires, color not notes but could look at back of connector for underseat light. Branches off midway back and to plug for underseat light. Not sure of power on source, maybe seat latch, seems like on shut off delay, assume 12v power and ground.
In plastic protective cover are 5 wires for tail lamps:
brown = ground
white = running (12V when the bike is on, 0V otherwise)
red = brake (12V when either brake is applied)
green = right signal (alternates between 12V and 0V as the signal blinks)
yellow = left signal (likewise).
Running down right rear side of bike from a connector are 2 sections of wires:
Wrapped in fabric like electrical tape:
Red/white = always on 12v, direct to battery, for underseat optional power outlet.
Brown= ground for power outlet.
2 other wires, I didn't note colors, I assume powered on by key, 12v power and ground for license plate light.
2 more wires, color not notes but could look at back of connector for underseat light. Branches off midway back and to plug for underseat light. Not sure of power on source, maybe seat latch, seems like on shut off delay, assume 12v power and ground.
In plastic protective cover are 5 wires for tail lamps:
brown = ground
white = running (12V when the bike is on, 0V otherwise)
red = brake (12V when either brake is applied)
green = right signal (alternates between 12V and 0V as the signal blinks)
yellow = left signal (likewise).
Found this on BMW Webblog:BMW Wiring a BMW Scooter Top Case
(January 29, 2013): Here is a good tip from scooter owner "E.R." on wiring the BMW top case for extra tail lights:
"First of all I really appreciate your C650GT blog, particularly since there are no very active English-language forums on it; it's kind of a black sheep bike.
Anyway I bought one a couple of days ago and hooked up a top case with running/brake/turn lights, as well as satellite radio, so I have some input for anyone looking to hook into the bike's wiring. This is specific to the GT but the Sport is very likely similar.
Open the seat and pull off the foam; it's not attached to anything and can be simply pulled out. On the right side you'll see two Torx bolts and a black Phillips-head quick-release fastener. Remove these and the right rear fairing will easily pop out. This exposes the wiring that goes to the rear lights.
You'll see a plug, and behind it are five wires in regular insulation (and not the woven tape that is used in most places). This insulation is very easy to cut off to expose the wires.
You'll see five wires; the colors are as follows: brown = ground white = running (12V when the bike is on, 0V otherwise) red = brake (12V when either brake is applied) green = right signal (alternates between 12V and 0V as the signal blinks) yellow = left signal (likewise). So that's pretty much every wire you'd need for most things (still don't know how to access the headlight wires though).
For my radio, I had a 12V->5V DC-DC converter and an AmpliRider amplifier that needed to be stowed somewhere, so I popped off the plastic panel at the center of the handlebars (just remove one Torx screw) and this exposed a large cavity in which I was easily able to place both things (with 3M Dual-Lock tape) as well as the excess wire lengths."
(January 29, 2013): Here is a good tip from scooter owner "E.R." on wiring the BMW top case for extra tail lights:
"First of all I really appreciate your C650GT blog, particularly since there are no very active English-language forums on it; it's kind of a black sheep bike.
Anyway I bought one a couple of days ago and hooked up a top case with running/brake/turn lights, as well as satellite radio, so I have some input for anyone looking to hook into the bike's wiring. This is specific to the GT but the Sport is very likely similar.
Open the seat and pull off the foam; it's not attached to anything and can be simply pulled out. On the right side you'll see two Torx bolts and a black Phillips-head quick-release fastener. Remove these and the right rear fairing will easily pop out. This exposes the wiring that goes to the rear lights.
You'll see a plug, and behind it are five wires in regular insulation (and not the woven tape that is used in most places). This insulation is very easy to cut off to expose the wires.
You'll see five wires; the colors are as follows: brown = ground white = running (12V when the bike is on, 0V otherwise) red = brake (12V when either brake is applied) green = right signal (alternates between 12V and 0V as the signal blinks) yellow = left signal (likewise). So that's pretty much every wire you'd need for most things (still don't know how to access the headlight wires though).
For my radio, I had a 12V->5V DC-DC converter and an AmpliRider amplifier that needed to be stowed somewhere, so I popped off the plastic panel at the center of the handlebars (just remove one Torx screw) and this exposed a large cavity in which I was easily able to place both things (with 3M Dual-Lock tape) as well as the excess wire lengths."