Motorcycle Repair: Electrical issues with lights constantly on, filament bulbs, dual filament

Question
1982 Kz550-C LTD

I have a problem with the rear turn signals staying illuminated all the time (single filament bulb). I do not know where to go next on my search.

The horn also does not work, the turn signal indicators always stay dimly lit, and the highbeam indicator does not come on with highbeams switched on.

So far I have done the following:
Replace flasher relays (I tried both original and electronic flasher)
Replace the entire left hand control
Trace all wires to find no open or cut wires


The turn signals do in fact work but they act like dual filament running lights, when they are not designed to do such a thing.

Is it possible the the horn is creating some sort of open circuit to allow such a thing?

Do you have any insight on this?! because it is frustrating to have a bike and not be able to ride! THANK YOU VERY MUCH  

Answer
Tony, there is somewhat of a wiring diagram online at:
http://www.kzrider.com/archive/images/public/img-1126756980.jpg

Front turn signals generally are dual filament, as they serve as running lights when the bike is running and the headlights are on LOW BEAM. When HI BEAM is selected, the running lights go out to allow full power to the headlight. Front bulbs are usually a 1157 type automotive unit.
The rear units are single filament bulbs, again needing a good ground path.

Usually when there are electrical ghosts keeping light bulbs illuminated, it is due to a lack of proper grounding of the units or missing chassis/engine/harness ground at some point.

The horn should be powered up in and out of the horn assembly, then the handlebar switch puts the ground contact to activate the circuit. Because horns seldom see much action, the internal contacts can corrode and cause it to either short out or to create an open circuit between the contacts. Some horns can be disassembled and the contacts cleaned, otherwise, replace it with another 12v horn with similar mounting system.

Check the bulb for the hi-beam indicator and make sure that it is also getting a good ground, as well.

Bill Silver