I replaced my turn signals in my 84 nighthawk w aftermarket one and chopped of my rear liscence plate mount and light now i cant get my new turn signals or front one to work at all. All that happens is the right turn signal indicator in the insterment pannel stays light. Whats up?

The aftermarket LED's will likely have a signal reducer in-line that will have to be removed before you put standard lights in. The reason it will have these, are because when you replace OEM lights with after market LED's they have a tendancy to HYPER-FLASH. Simply because they are computer controlled instead of flasher controlled.

The stock rear function ONLY as turn signals, while the fronts ALSO function as running lights (hence the extra wire).
On the aftermarkets, one wire will be the ground (usually BLACK).
The stock setup probably grounded through the metal casing.
The aftermarket housings MIGHT be plastic, so they need a separate ground wire.
Myself, I'd reverse them and wire the 3 wires to the rear, to have them act as extra brake lights also.

Here's a quick take from the official H-D release. The wide, angular air-box cover and chopped tail section look as solid and smooth as billet and give the new V-Rod Muscle lines that are clean and powerful. The size of the massive 240 mm rear tire is accentuated by the new broad, clipped and clean rear fender. The combination stop/tail/turn LED light is tucked under the edge of the rear fender, and the side-mount license plate leaves the fender surface smooth and uncluttered. Front-end styling balances the rear, with a trimmed fender that's blacked out behind satin-finished inverted forks and LED turn signals integrated into the mirror stems. The radiator shrouds are restyled and color-matched to the rest of the bodywork, while the new airbox side covers incorporate air scoop inlets covered with woven wire mesh. The silver five-spoke cast aluminum front and rear wheels are a new design for the V-Rod line.

do they blink as normal? if so this is all they should do the front lamps are continously lit as side lights but are not required on the back, check the wires going to them if they are flashers only their will be two wires, if theirs three they have side lights also, after this check the bulbs Regards Jim,,,

check the ground wire behind the dirveside back tire under the fender near the bumper it may be loose i had the same problem and had to reground it just with a nut and bolt to my frame

open trunk, remove the plastic panel around the latch plate, remove the plastic mounting bolts that hold the grey trunk liners in place, there are two 10mm nuts that hold in the light remove nuts pull out light twist the bulb retainer out and replace bulb.

Hi and welcome to FixYa,

Honda in general uses standardized wiring scheme:

• green - common ground;
  
• light blue - right turn signal;
  
• orange - left turn signal.
  

Good luck and thank you for asking FixYa.

at the back of the indicator stem is a 14mm nut undo this then disconect the wires assembley is the reverse of this. do all 4 in this way