99 m900

Started by zharber, January 24, 2016, 07:49:20 PM

Previous topic - Next topic

zharber

My 99 m900 recently the rear running light started to flash. The brake light works normal. Didn't ride it for like 2 weeks and the battery got real low. Put the battery tender on it and upon start up this happened. Any ideas on what happened? Maybe disconnect battery and reconnect? Was a solid normal rear running light before this. Also if anyone has a band that is riveted on ends of term I exhaust cans I need one

Howie

Most likely a bad contact in the bulb socket.  Could also be a loose connector .

clubhousemotorsports

+1
The vintage of the bike means it is just a dumb bulb and wiring back there (no led's correct?) so the most common cause is that the socket has worn or the power feed to the back side of the bulb could use a little (careful ) bending to make better contact. Since the brake light works I would guess it is the feed tab is just not touching the bulb contact well.

zharber

Its almost brand new led taillight. Worked fine before the battery was to weak to start the bike. Then after I put the battery tender on it and started it up again is when itstarted doing it.

clubhousemotorsports

Just swap back to the old lights for a test, I would guess something is failing in the led board.

Was it a bulb replacement LED or a complete taillight replacement unit?


zharber

Full replacement unit from monster tail chop. I'll text it with the stock one tomorrow. Need to finish putting my termis back together after the can chop

zharber

Tested the stock brake light and problem goes away. Plug back in the led unit and problem still exists. Sent monster tail chop an email. Hopefully they will know what the problem is

clubhousemotorsports

Remember LEDs are direction sensitive so make sure you are not reversing polarity. After that it is probably something failing on the board, this was a big problem with leds tail lights when they started making them for bikes as the failure rate was too high. Cheaply made units with poor components and haphazardly built fail often enough.

That said everyone makes mistakes so just because one has failed it does not mean they all are junk, may have had nothing to do with the builder but the supplier of his components. Also a power spike can certainly destroy parts, I remember being in electronics class and feeding power into a diode while it was on the oscilloscope until it went "POP".

99 regulators are usually very good so I would be surprised if the bike caused it.

zharber

My guess is something on the board. Battery tender shouldn't have caused a spike since its just a trickle charger. Battery wasn't all the way dead just need like 15 minutes to have enough juice to start the bike. Hope to hear back from monster tail chop today. Appreciate all the input guys. Don't post much on here unless I'm completely stumped, but when I do it's nice hearing all the ideas that I might not have thought of

zharber

Got a reply from monster tail chop. Apparently any time there is a drop is power and this happens. Remove the little black rubber plug on back of light and inside of hole there is a program button for l.p. light, stop alert, and sequential signals. If you press it 5x fast it will reset and problem solved!!!

clubhousemotorsports

Excellent news!

Now as long as the low voltage is not high enough that you have to do this often , life it good!

zharber

Yea was just busy for a couple weeks and didn't start it up or ride. And forgot to hook up to battery tender. Won't make that mistake again.

zharber

Just need to try and get a hold of baz now to see if he wants to sell me a strap of his damaged termi. Its like trying to find a unicorn to get one of these!