How do I install my intergrated tail light with turn signals i got the tail light to work but the stock turn signals have about three wires each

obviously it may have to do with the installation of the new stereo, while installing some fuse may have blown or wires are cut or wires were not put back in order.

you could have blown some fuse while installing the stereo. check the fuses, wires that may have been cut or disconnected.

Change the bulbs only

Make sure the wireing is all connected properly, i do know that some of these units only use 1 earth wire for the whole light, where as you would have 5 wires for the earths originaly, 2 x indicators, 1 x stop and tail light, 1x number plate light, it may be that you have wired an earth into a live circuit on the new lamp, the coloure code does not always mach that of your bike, so you will have 2lives for the rear indicators, identify these by putting the wires directly to your battery one at a time, connect the indicators using the indicator live wires only to the new unit, the stop light using the live wire only, and the rear light using the original earth and rear light live

Jim as a mech at the HD place he cant modify it,but you can.Bench test the part then meter the circuit on the bike you will have it in no time.

One wire is for the brake/directional filament and the other wire is for the tail light. The fixture should be grounded when it is attached to the bracket. To test which is which (the brown wire is USUALLY the ail light) make sure the fixture is grounded and touch a hot wire to each of the wires coming from the fixture. Watch to see which wire lights up the brighter filament and this is the brake/directional light. The dimmer filament if the tail light. Brakes lights and directional lights are both the same filament. Wen the brakes are applied, both lights are activated. When a direction light is turned on, it simply flashes the brake light filament.

remove stock relay ,find out which is live in on the new ic relay and connect this to the blue wire,find the live output from the relay and connect this to the grey wire, the last wire may need to be connected to ground to provide an ground signal to make it flash.

I had the same problem with my 1997 marauder the only way i have found to make them work is to hook up the LED signal lights into the stock signal lights i know it sounds crazy but what i have figured out is that it uses the stock bulbs like a fuse. all you have to do is take the headlight out just like you did when you wired in the LED lights and wire in your stock bulbs along with the LED lights once you have done this put the stock bulbs in the headlight assembly and put the headlight back in this should fix your problem at least it worked for me let me know if it works for you as well good luck

make sure all green wires are earthed an check your main fuse

The best way to troubleshoot an electrical problem is to return the bike to it's original condition and get everything to work like that. Then (using the correct instructions) reinstall the accessories one at a time making sure each part works before going on to the next one.
The "extra" wires probably are not extra. They may be the ground wires, Honda dosen't ground anything through the frame. Be sure you (or the person installing accessories) knows how to work with electric components.