LED Taillight

[92HD]

Installed a led taillight on my motorcycle,When i use the turn signals i get a voltage drop of about 2 volts at the taillight and brake light if brakes are on.With the regular bulb tailight i never noticed the taillight dimming.Looks like a voltage drop through the wiring.Any suggestions on some kind of voltage regulator for my led light?
I was thinking about using 2 relays,going from a fuse on the battery through the contact to the led,but have limited space.

 

[gerty]

Are you using a load resistor to make the turn signal flash. Leds draw soo little current that you need to install a load resistor to make the flasher work. That load may be more than the original bulb, causing the drop.The led tail light should only draw about 150ma , as opposed to the incandescant at 3a..If the problem was in the wiring it would show up more with the incandescant than with the led..Was it a direct replacement bulb ,same number of pins on the socket etc..

 

[92HD]

gert

Installed a badlands turn signal load equalizer a couple of years ago to make the non stock turnsignals flash,not sure what the resistance is.The new led taillight is a lot brighter than the old taillight,it has a board with a bunch of led's on it.

Ed

 

[gerty]

Here's some of the possibilities that I can think of:
If you are checking with motor off ,you might have a weak battery.

There might be a bad(loose) connection in wiring or bad(high resistance)contacts on switch.

The tail light is wired backwards, bright for tail light and dim for brake..wouldn't account for voltage though...

With lights on:
I would check voltage at battery.
voltage going into headlight switch.
voltage leaving switch.
voltage at tail light, in that order. As soon as you see a drop it should let you know what to look for. A bad ground will give you a dim light, but again it doesn't account for the 2 volt drop..
Let us know what you find ,and what the voltage readings are.