Question about 1993 Harley Davidson FLSTF Fat boy

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Brake light switch

Replace rear brake light pressure switch

Posted by Anonymous on

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Hi Anonymous, remove the old one and install the new one putting slight pressure on brake pedal to purge air just before switch gets tight. Good luck

Posted on May 01, 2015

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Posted on Jan 02, 2017

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2008 fxstc harley brake light stays on. I changed the front brake light switch but still stays on. Any help?


Check the rear brake light pressure switch. Follow the metal tube that comes out of the rear brake master cylinder going back to the rear brake. You will find a pressure switch in the line. Disconnect the wires from it and check it with an ohm meter. You may have to open the brake bleeder valve on the rear caliper to bleed any residual pressure off the rear brake system. If the light goes out then, you may have a problem with the rear brake master cylinder or the brake hose not allowing all the pressure to bleed off the brake when released. I've seen a bad brake hose do this as well. This is usually the result of damage done while servicing the rear brake. The inside part of the flexible brake hose comes loose from the outer protective jacket. The inner part becomes restricted in such a manner that the high pressure fluid is forced past the restriction when the brake is applied but it will not allow the low pressure fluid to flow back due to the restriction. The result is a low pressure remains on the rear brake making the brake pads run hot and the rear brake light to stay on.

Good Luck
Steve

Aug 27, 2011 | Harley Davidson Boulevard C109RT...

1 Answer

Rear brake light will not work when brake pedal is applied, both front and rear brakes run through same sensor front brake applies rear light, but rear brake pedal doesnt. where is the problem?


It sounds like the rear brake pressure switch is bad. The wires for the front brake light switch are wired in parallel to the this switch. Replace the pressure switch in the metal brake line coming from the rear brake master cylinder going to the rear brake caliper.

Good Luck
Steve

Aug 21, 2011 | 2000 Harley Davidson FLHTCUI Electra Glide...

1 Answer

Signal lite not working on 1997 hd softtail springer and brake lite


Well, you could have one problem or more than one problem. First check the bulbs. If you have any bulbs that are not lighting up in the turn signals, this will stop them from blinking on that side. Once you're sure the bulbs are good, the best thing to do is to work with one problem at the time.

First the brake light. Take the bulb out of the socket, turn on the ignition switch and have someone step on the rear brake. Use a volt meter or test light inserted into the socket to check for voltage on both contacts in the socket since the brake light and the tail light should be on at this time. If there is no voltage on the contacts, check the rear brake light switch. There is a metal brake line that comes out of the rear master cylinder. Follow this line back towards the rear brake. Underneath the bike you'll find a pressure switch. With the ignition switch on, you should have voltage to one of the two connectors. In not, you have an electrical wiring problem. If you do and the light is not coming on when you press on the rear brake, replace the pressure switch. This should get the brake light working for the rear brake at least. If the front brake does not cause the brake light to come on, the front brake light switch is probably bad. It's located inside the right handlebar switch house along with the throttle grip. You have to take the switch housing apart to replace the switch.

For the turn signals, if you will contact me directly at wd4ity@bellsouth.net, I will send you four pages of troubleshooting for your turn signal system. Please remind me of what you need.

Good Luck
Steve

May 09, 2011 | Harley Davidson Stalker Motorcycles

1 Answer

Brake light does not work when brake is engauged


You have two brake light switches, one for the rear brake and one for the front brake. If neither switch turns the brake light on, the first thing to check is the bulb. If the bulb is good, check the socket and the wiring to it.

If all that is good, find the rear brake master cylinder. Follow the metal tube coming out of it going to the rear brake. Underneath the bike, there is a pressure switch that turns on the rear brake light. Check to make sure the wires are connected and that one set of wires is "hot" when the ignition switch is in the "ON" position. If so, the switch is probably bad. Replace the switch. I have seen them check good with a meter but still not turn on the brake light. Work with the rear brake light switch first as it's the easiest and least expensive to fix. When you get that working, repost and I'll take you through replacing the front brake light switch. It's quite a bit more difficult to replace than the rear switch. I'm sure that procedure is in the archives as well because I've posted it a number of times.

Good Luck
Steve.

Apr 30, 2011 | Harley Davidson XLH Sportster 883 Hugger...

1 Answer

My running lights work but by break light wont


Check the bulb first. There are two filaments in the bulb, one for the brake light and one for the tail light. If the bulb is good, there are two switches that turn the brake light on. One is on the front brake lever and the other is a pressure switch in the metal brake line from the rear master cylinder. Work with the rear brake light switch first.

Find and follow the metal brake line coming from the rear brake master cylinder running back towards the rear brake. Underneath the bike's transmission, you'll find a tee fitting with a pressure switch in it. With the ignition switch turned on, one of the wires that are plugged onto the switch should have battery voltage on it. When you depress the rear brake pedal, both wires should have voltage on them. If not, replace the switch.

Once you get the rear brake light switch working, if the front brake light switch does not work, it must be replaced. To replace that switch, remove the two bolts that hold the right handlebar switch housing halves together. Loosen the throttle cable and idle cable adjustments. Lift the top switch housing half and remove the throttle sleeve. The front brake light switch is the small switch right in the front of the housing half. You must desolder the wires, replace the switch with a new one, and resolder the original wires to the new switch. Reassemble the throttle sleeve and switch housing halves. Adjust the throttle cable and idle cable. Check throttle for proper operation.

Good Luck
Steve

Mar 24, 2011 | Harley Davidson FXDWG Dyna Wide Glide...

1 Answer

Brake light does not work when you press the brake padel


This sounds like something wrong with the rear brake light pressure switch. Find the rear master cylinder. There is a metal line coming out of the rear of the master cylinder. Follow this line towards the rear of the bike. You'll come upon a "tee" fitting with a pressure switch in it. Check the wires going to the switch and make sure they're plugged up. If so and you still don't have a brake light, replace the switch. Simply unplug the wires, screw the switch out and screw a new one back in. Do not depress the brake pedal while you have the switch out.

good Luck
Steve

Dec 24, 2010 | 2005 Harley Davidson FLSTC - FLSTCI...

1 Answer

My brake light is not working when i apply rear brake. works fine with front brake.


If your rear brake light is not working but the front is, this means the pressure switch for the rear brake light is bad. Find the rear brake master cylinder and follow the metal line out of the master cylinder as it goes back towards the rear wheel. In the line, you'll find a "tee" fitting with a pressure switch screwed into it. Make sure all the wires are on the switch. If so, the switch itself may be bad. Replace the switch.

Good Luck
Steve

Dec 21, 2010 | Harley Davidson XL 1200 C Sportster Custom...

1 Answer

Rear brake light not working


The brake light is turned on and off by either of two switches on your bike. The front brake lever has a switch located in the right handlebar switch housing. When you squeeze the lever, a pad on the lever moves forward allowing the switch button to move forward making contact which in turn switches the brake light on.

The rear brake lever operates a plunger inside the rear brake master cylinder that pressurizes the rear brake and rear brake hose and line. The rear brake line has a tee fitting in it along it's run with a pressure switch in the tee. Once the pressure on the line gets high enough, the switch turns on the brake light.

If your rear brake light switch is not working, check to make sure the wires are on the prongs of the switch. If they are, replace the switch. It simply screws out and a new one screws in. Most of the time you don't have to bleed the brakes as long as you don't move the rear brake pedal with the switch out. Check the rear brake for proper operation prior to riding the bike.

Good Luck
Steve

Jun 17, 2010 | 2008 Harley Davidson FLHRC Road King...

1 Answer

Rear brake light not workiing


There are two brake light switches. One is in the right handlebar switch housing. This is front brake light switch and is a simple push button type switch actuated by the front brake lever.

The other switch is a pressure switch and it is located in a Tee usually somewhere under the bike near the rear of the transmission. Follow the metal tube coming out of the rear of the master cylinder. It will go back towards the rear brake. Somewhere in that line there will be a tee with the pressure switch in it. If you jumper across this switch, the brake light should work. If it does work when you do this but not work when you depress the rear brake signal, replace the rear brake light switch.

Good luck
Steve

May 26, 2010 | 2000 Harley Davidson FLHRCI Road King...

1 Answer

No brake light at all, changed bulb still nothing, wiring is all good,running light works, all other lights work,just no brake light at all..


There are two switchs that operate the brake light. One is a mechanical switch at the handlebar brake lever and the other is a pressure operated switch somewhere along the metal rear brake line.

To test the brake light wiring, find the pressure switch on the rear brake line. It should have two electrical connections on it. With the ignition switch on, jumper across these two connections. The brake light should work. If not, there is something wrong with either the wiring, the socket, or the bulb. If it works, I'd replace the pressure switch. They aren't expensive.

If the front brake switch doesn't work, you can replace the switch in it but you'll have to remove the switch housing on that side of the handlebar, unplug the wires for the switch, swap out the switch with a new one, plug the wires to it, and replace the switch housing. Sounds simple and really it is but not as easy as it sounds. You'll have to deal with the throttle cables and mechanism as well. Good Luck.

Feb 22, 2010 | 1993 Harley Davidson XLH Sportster 883...

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