Question about 2003 Harley Davidson FXDWG Dyna Wide Glide

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I have a 03 FXDWG and the rear brake light stays on all the time. The front and back brakes are free and do not seem the be bound up. There is a sensor by the rear brake reservoir that has wires running to the rear of the bike. Could this be the problem and if so how do i check?

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Yep, the pressure sensing switch(sensor) is probably stuck. Pull one of the wires off, the light should go out. Remove the other wire and use a DVOM set to "continuity"or a self powered test light. Touch it across the 2 wire terminals on the switch and see if the meter shows continuity or the light come on. Step on the brake, it should change.I believe the switch is part of the brake line, so the whole thing has to be replaced. If you have air in the brake lines, I have seen engine heat expand the air enough to turn on the brake light, but not apply the brakes.

Posted on May 02, 2009

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2001 hd dyna wide glide brake light does not come on when brakes are applied , tail light works,bulb is ok , is it the brake sensor ,where is it located and what does it look like thanx


Your Wide Glide has two brake light switches. One is in the right handlebar switch housing and operated by a tang on the front brake lever. If it's not working you probably have a bad switch up there as well. The rear brake switch is underneath the bike. Find the metal line coming out of the rear brake master cylinder. Follow this line back towards the rear brake. You should find a "tee" fitting with a small switch screwed into it. It'll have two wire plugs with about four wires on it unless they've changed something. You'll know it when you see it. Replace this switch first. Since the front brake light works off this switch as well, it may fix the front brake light switch as well. If not, you'll have to take the right handlebar switch housing apart to get to the front switch.

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Aug 04, 2010 | 2002 Harley Davidson FXDWG Dyna Wide Glide

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When I use the back brake, the brake light won't come on. I have checked the switch and it appears/tests good. I have 12 volts going to the switch. The brake light works with the front brake


Replace the rear brake light switch. I've run into this before as well. When checking the switch with an ohm meter, it appears good but it will not light the rear bulb. The front brake light switch worked correctly as well. I can't explain it but replacing the switch, even though it checks good, solves the problem every time.

Mar 23, 2010 | 2002 Harley Davidson FXDWG Dyna Wide Glide

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02 harley fxdwg brake light stays on


Make sure your rear brake pedal has freeplay in it. when you slowly push the lever down by hand you should be able to feel some freeplay. if not the the reason it keeps staying on is because the vibration of the motor is actually pumping up your brake ( light too ) and not releasing it until it bleeds off the pressure.

Jun 23, 2009 | 2002 Harley Davidson FXDWG Dyna Wide Glide

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