Need a wiring diagram for a 04 1500 Vulcan Classic. from the handle bar switch to the solenoid

Yellow - Constant 12 Volt (battery)
Red - Accesory 12 volt (switched) only 12 volts when car in accesory or on position
Black - Ground (chasis)
White/white with black stripe - Front left speaker (black stripe is negative polarity)
Gray/Gray with black stripe - Front right speaker (stripe negative)
Green/green w/ black - rear left
purple/purple w/ black - rear right
solid blue - power anteanna (not all have this wire)
blue w white stripe - remote turn on (used to turn amplifier on or power anteanna)
yellow w/ black stripe - mute (for cellphone handsfree kit)

solenoid jammed on...

12V CONSTANT WIRE RED and PINK/BLACK Ignition harness
12V IGNITION WIRE DARK BLUE Ignition harness
12V ACCESSORY WIRE BLACK/ORANGE Ignition harness
STARTER WIRE YELLOW Ignition harness
PARKING LIGHTS (+) BLACK/YELLOW At Headlight switch
POWER DOOR LOCK (5-wire reverse polarity) ORANGE/PURPLE Harness Coming Into Vehicle From Driver's
Door
POWER DOOR UNLOCK (5-wire reverse
polarity)
PINK/PURPLE Harness Coming Into Vehicle From Driver's
Door
DOOR TRIGGER (-) YELLOW/BLACK At Headlight Switch
DOMELIGHT SUPERVISION (-) Use door trigger
TRUNK TRIGGER (-) GRAY/BLACK At Light In Trunk
TACHOMETER WIRE TAN/BLUE or BLACK/GRAY At Ignition Coil
BRAKE WIRE (+) WHITE/BROWN At Brake Pedal Switch
HORN TRIGGER (-) BLACK/RED Harness Coming From Steering Wheel At
Column
CAUTION! SRS airbag wires are not enclosed in protective loom at the steering column. They are a twisted pair of wires that run with rest of
ignition harness. Be careful not to cut or probe these wires.

Radio:

(Black plug)
Rear Right speaker -: Blue w/White stripe
Rear Left speaker -: Brown w/Yellow stripe
Front Right +: Purple
Front Left +: Dark Green
Rear Right speaker +: Blue w/Orange Stripe
Rear Left speaker +: Brown w/Blue Stripe
Power Antenna/Amp: White
(Gray Plug)
+12v battery wire: Pink or Pink w/White Stripe
+12v Ignition wire: Red w/ White Stripe
Front Right speaker -: Blue w/ Red Stripe
Front Left speaker -: Brown w/ Red Stripe

Bad switch,Bad relay,bad solenoid the solenoid may need cleaning.
For troubleshooting remove the positive wire from the starter.
That is the biggest one. on the starter.
Now place a load on the wire say a headlight or 12 volt fan

I think the wire colors changed sometime after 2000. If you still have the old controls, you may can make up your own wiring diagram. While you've got the switch housings open to put them on the handlebars, write down what color wires come off of what switch. Do the same with your old switches and your new switchs. If your horn button uses a red and a black wire on your old controls, and your new switch uses a red/white and black wire, then draw your diagram to match the red/white wire where the red wire went.

You're going to have to do a certain amount of this as you will not find a wiring diagram that shows an 89 model bike with 2004 handle bar wiring on it. Good Luck!

there should be a slot for each wire on back of ignition play with them till you get it right cant hurt anything

Try looking up Powersprtseast.com They have a parts fische you can use and though not in color itself may have colors labled on diagram for wiring harness.

1991 Ford Explorer XLT Radio and Speaker Wire Colors
Pulled out the stock radio and found two plugs on the back of it. One plug had 7 wires (Power, Dimmer, Amp etc.) and one had 8 (Speakers).
7 wire plug (I could see these wires immediately from the plug):
Car Radio Battery Constant 12v+ wire = Light Green w/ Yellow Stripe
Car Radio Ground Wire = Black
Car Radio Accessory Switched 12v+ wire = Yellow w/ Black Stripe
Car Radio Dimmer Wire = Light Blue w/ Red Stripe
Car Radio Illumination Wire = Orange w/ Black Stripe
?? Don't know ?? Red Wire (No power to wire Constant or Accessory)
Car Radio Amp Wire = Blue
8 Wire Plug (Wires were wrapped in a grey outer sleeve, had to cut sleeve to get to wires.):
Right Front:
White w/ Green Stripe (+)
Brown (no stripe) (-)
Right Rear:
Purple w/ White Stripe (+)
Light Blue (no stripe) (-)
Left Front:
Light Green (no stripe) (+)
White w/ Orange Stripe (-)
Left Rear:
Light Blue w/ Black Stripe (+)
Yellow (no stripe) (-)
Speaker Wires (found at the individual speakers in the doors)
Right Front:
White w/ Green Stripe (+)
Green w/ Orange Stripe (-)
Right Rear:
Orange w/ Red Stripe (+)
Black w/ White Stripe (-)
Left Front:
Orange w/ Green Stripe (+)
Blue w/ White Stripe (-)
Left Rear:
Red w/ Green Stripe (+)
Red w/ Blue Stripe (-)

If you are mounting the unit to the bars or fairing, I would recommend using a power lead which is available in the fairing, rather than the AUX accessory switch.  The AUX switch sends power to a connector under the seat, in front of the battery.  You would need to run new wires up under the fuel tank, along the neck and into the fairing to connector your Zumo to the AUX.  Instead, there is a 12+ V switched ignition power lead which is not used on U.S. touring bikes and would be perfect for connecting your Zumo.  Pull the fairing off the bike (7 screws, TORX T-27) and look at the headlight harness, which is 3 wires, black, white, yellow.  Attached to this harness will be 2 wires, a black and an orange w/ white stripe.  The orange will have a red silicone cap over it to prevent it from shorting out in the fairing.  Cut the zip-ties which connect these 2 wires to the headlight harness and then hook it up to your Zumo, black is negative, Orange positive.