I've had some older Hondas, the flasher relay is usually the problem with blinkers.
It's the easiest and cheapest thing to check, go to the auto parts store and buy a 2 blade flasher relay and plug it in. If that's the problem it'll be solved .
Next, open up the headlight bucket , check all the green wires at and in the plug and on the headlight mount bolts. The directional lights also have a ground wire,and that should be checked. Take off a lense and remove light bulb check for rust. That takes care of the visual part.
Multimeter time.Now that everything is open and accessable .set it for ohmns, cross the red and black to make sure the meter is working, now you can check some wires find a lt. blue wire, for one side of directionals , find both ends of the same wire and check it, if it's good go to the next lt. blue until satisfied. Orange should be the other directionals,trace and check those.You are looking for broken wires that won't carry current from one end to the other end . Do the same with the ground wires (green).
You can do the same thing with the wires going through the bars without removing the wires, just open the pods and check both ends of the wires.
If you think there is a dead short in the bars , energize the system, use a test light, ground it, touch the bars with the probe end , if it lights up , it's a dead short and you may have to remove the wires from the bars,in which case,shoot some wd down the bar ,remove wire ends from bucket , push the ends into the hole then pull gently feed it ,pull it,feed it ,pull it. Fix the trouble and slide a single 12 or 14 guage wire up the center of the bar to the control pods hole , feed it through about 10 inches , straighten out your wire and tape them to the single wire, wd again and slide them down the hole and catch them on the other side. easy peasy. be sure all the wires in the bucket are plugged in securely and correctly, test unit, then button it up. cake!