SOURCE: No rear brakes, pedal goes all the way down and
You need to check you rear brake master cylinder. Something is wrong with this as your rear brake is not working. The brake light for the rear brake is activated by a pressure switch whereas your front brake light is activated by an normal push/release switch. Fix your rear brake problem and the brake light problem will be repaired as well.
It may be time to rebuild your rear brake master cylinder.
SOURCE: when I use the front brake the brake light
remove switch cover on front brake master cylinder.support assembly. check connections at brake cyl.switch,check wires were not 'pinched' by cover against handle bar
SOURCE: My rear tail light does not work when the front
You should have two filaments in the reat taillight lamp, one for tail light and one for brake light. You are not confusing these filaments/functions are you?
What you seem to be saying to me is that you have a lamp that had no tail light filament (burned out) but does have a brake light filament still intact.
Remove the light and check it visually and/or with a contunity tester.
I hope this helps you ...
If I misunderstood your question, please ask me again
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SOURCE: have tail light working but brake light does not
Starting at the rear brake master cylinder, follow the metal line back towards the rear caliper. you will find a brake pressure switch in the line somewhere. Make sure all connections to this switch are secure.
If so, check the rear bulb for a blown filament. It has two filaments, one for the tail light and one for the brake light.
SOURCE: harley 1998 ultra wiring schematic
Sorry but I don't have a wiring diagram that I can send you but I may can offer a bit of help.
Your passing lamps are simply wired into a hot circuit somewhere. A lot of schematics don't show them because they are considered "add ons". They also may have a fuse inline with the "hot" wire. They have only one wire that connects them to the bike with the rest being inside the "light bar" itself. Find the wire coming out of the center of the "light bar" and trace it back to where it hooks up. Sorry but that's the best I can do on this one.
On your front brake light, there is a switch located inside your right hand switch housing where your throttle is located. It is a plunger type switch that is activated when you pull the front brake lever. A simple test of the switch is to loosen the bolts of the master cylinder and slide it towards the center of the handlebars. If the switch is good, the brake light will come on. If the switch is bad, it will not.
To get to the switch, you'll have to take the right hand switch housing apart. First, loosen the throttle cables at the adjusters and then remove the two bolts that hold the switch housing halves together. Carefully open up the switch housing. You will see the small switch in the front of the housing. You'll have to desolder the wires, replace the switch with a new one, and resolder the wires to the new switch.
Reassembly is the reverse of the disassembly. Make sure you slide the master cylinder all the way back against the switch housing or the brake light will stay on constantly. Readjust the throttle cables and check for proper operation. You don't want your throttle sticking.
Good Luck
Steve
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