weird brake light problem

bonehead · Scooby Slapper Joined: 16 Nov 2004 Karma :

Put a new bulb in the rear of the bandit, but it doesnt get brighter when i brake? I thought the switch was trashed, but it does come on when the lights are off and I apply the brake Confused

geordiecbrblo... · Trackday Trickster Joined: 17 Jul 2005 Karma :

At the risk of asking the obvious Wink

you did put a dual filament bulb in there i.e. usually 21W / 5W ?

bonehead · Scooby Slapper Joined: 16 Nov 2004 Karma :

Finglonga · World Chat Champion Joined: 27 Jul 2004 Karma :

Or you have the right bulb but its in upside down. It shouldn't fit that way but its possible to get it wrong.
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Andy Sez....
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Phil_P · Trackday Trickster Joined: 10 Nov 2007 Karma :

Could be that old standby, a dodgy earth.
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Moto Guzzi 1100 Sport Injection '96

Old Time Biker · Two Stroke Sniffer Joined: 15 Jul 2007 Karma :

when I put some new LED rear lights on a 98 bandit the bulbs went in upside down. Side lights were brake lights and vice-versa,proper pain in the arse,ended up going back to standard bulbs-didnt fancy re-wiring bulb holders.
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IT WENT WHOOOOSH.........AND WAS GONE!!

Pete. · Super Spammer Joined: 22 Aug 2006 Karma :

To check if the bulb is in upside-down first pull the front brake to put the "brake" light on. Now, still holding the brake, turn on the lights - if it gets brighter the bulb is in wrong.

TBH the problem sounds like a bad earth, or as said above a single-filament bulb.
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a.k.a 'Geri'

132.9mph off and walked away. Gear is good, gear is good, gear is very very good Very Happy