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Old 03-24-2010, 01:10 PM   #1
adonets
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Question Rear braking lights problem

I have a Sachs MadAss and the rear brake light only turns on while braking. It should be on at least at a percentage of its capacity to identify me on the road at night. How can I fix this? It seems like it's not a problem in the wiring because the brake light works fine when the rear or front brakes are applied.

Any help/ suggestions would be appreciated.

- I cannot take it to a Sachs dealer -- there are none in Canada.
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Old 03-24-2010, 01:12 PM   #2
longride
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It's a dual filament bulb in there. The running light one is probably burnt, but the brake light one is fine. Replace the bulb and all will be well. If it is an LED in there, never mind.
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Old 03-24-2010, 01:31 PM   #3
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Quote:
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If it is an LED in there, never mind.
I am not 100% on whether the braking light is LED, but the turn signals are.

Will update when I check.
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Old 03-24-2010, 02:51 PM   #4
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Question

I took off the plastic cover and there was just one lightbulb in there. It is not LED and it works just fine when I brake. Does this mean the bike was not designed to even display the license plate at night? Would the bikes that do display it always have 2 separate lightbulbs? Is my wiring possibly screwed?

Edit: Sorry, error on my ignorant behalf. I thought you meant there are two separate lightbulbs but as I found out dual filament means there are two wires inside of it operating at different brightnesses.

How would I go about to finding out whether mine is broken?

Last edited by adonets : 03-24-2010 at 02:55 PM. Reason: lightbulbs
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Old 03-24-2010, 02:57 PM   #5
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Quote:
Originally Posted by adonets View Post
I took off the plastic cover and there was just one lightbulb in there. It is not LED and it works just fine when I brake. Does this mean the bike was not designed to even display the license plate at night? Would the bikes that do display it always have 2 separate lightbulbs? Is my wiring possibly screwed?

Edit: Sorry, error on my ignorant behalf. I thought you meant there are two separate lightbulbs but as I found out dual filament means there are two wires inside of it operating at different brightnesses.

How would I go about to finding out whether mine is broken?
No, the one filiment is burned-out. Sort of press-in and give a third-to-half turn counter-clockwise to remove it. Re-install is reverse. The bulb is probably an 1157. Look for an "LL" suffix bulb to replace it with a slightly-better bulb (i.e. 1157 LL for Long Life) The tail-light filiment is the usual one to burn out, I've taken to carrying spares with me.
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Old 03-24-2010, 02:59 PM   #6
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Those bulbs are really cheap at any auto parts store. Just replace the current one. Really simple.
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Old 03-24-2010, 04:23 PM   #7
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Quote:
Originally Posted by The_AirHawk View Post
No, the one filiment is burned-out. Sort of press-in and give a third-to-half turn counter-clockwise to remove it. Re-install is reverse. The bulb is probably an 1157. Look for an "LL" suffix bulb to replace it with a slightly-better bulb (i.e. 1157 LL for Long Life) The tail-light filiment is the usual one to burn out, I've taken to carrying spares with me.
I ended up getting a NH1157 nighthawk bulb (2). It is brighter and my rear light is semi-on when I don't brake, which is what I was going for.

Thanks so much!
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Old 03-25-2010, 05:34 AM   #8
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Congratulations! You have just affected your first motorcycle repair.
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Old 03-25-2010, 07:04 AM   #9
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How many posts does it take to change a lightbulb?

So these three Irish guys decide to go to the Atlanta Olympics. They get there and find out the tickets have been long since sold out. They decide to try to get in by pretending to be atheletes.

The first guy grabs a manhole cover and walks to the gate. "Maloney, Discus." The guard lets him in.

The second guy grabs a big section of pipe and walks to the gate. "O'Rielly, pole vaulting." The guard lets him in.

The third guy grabs a big bundle of barbed wire and walks to the gate.
"Hanaran, fencing."
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