Hi, Renee before diagnosing any brake light issue always check the bulb and fuse first for integrity a brake light staying on is usually caused by the front brake light switch, which is mechanical, not disengaging. On early models moving the throttle control housing closer to the front brake master cylinder is the main fix. On late models, the switch gets tweaked and needs to be realigned. A brake light that does not come on when the brake lever is applied can be caused by a faulty switch or no continuity in the wiring at the switch. The rear brake light switch is hydraulic and it is extremely rare to malfunction in a closed circuit condition causing the brake light to stay on. Usually, rear brake light switch issues are caused by no brake pedal free play or a sticky rear master cylinder piston. A brake light that does not come on when the rear brake pedal is depressed can be caused by a faulty switch, air contamination in the brake line, or no continuity in the wiring at the switch. Finally, most tail light wiring harnesses run under the rear fender held in place by spot-welded clips. Worn out rear shocks or lowered suspension can bottom out causing the rear tire to come in contact with the wiring harness, rubbing the insulation off, exposing the bare metal inner core, allowing it to break or short out.
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SOURCE: brake light
front brake lever not depressing brake light button. inside throttle housing or I had a guy the other day thought brake light was stuck on (found burnt fillament brake light)
SOURCE: oil drain plug 2004 harley dyna wide glide
your oil drain is on the right side pipe side of your bike look under near the rear back part of your frame you will see a plug with a one quarter allen key threaded plug style bolt kinda hidden in bridge plate of frame it is flat in conjuction with line on bike it is in area right behind where your back pipe expands to baffle of pipe where its skinny and then gets bigger its the one closest to you
SOURCE: cant find my fuse box for my 2000 harley davidson wide glide
You'll have to remove the large cover plate (pulls right off) direct opposite side of your battery cover plate to access the fuses, look to the rear of the bracket.
SOURCE: how to remove a ignition switch on a 2005 harley
You must have a special tool to maintain the alignment of the switch when you remove it. If not, you can't get it back on. I would suggest you take that to a shop.
Steve
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