Add Dual Filament Lighting To Rear Of Bike

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Add Dual Filament Lighting To Rear Of Bike

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Harley Davidson >> Do It Yourself Help Forum >> Electrical and Lighting >> Add Dual Filament Lighting To Rear Of Bike

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Add Dual Filament Lighting To Rear Of Bike - 3/19/2006 7:33:53 PM

HDF Tech

Posts: 14559
Joined: 5/14/2005
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Add dual filament lighting to the rear of the bike.

Yes I know there are modules out there that do this for you. Look at the bulb chart and compare the amps that the bulb uses. The filament that is the turn signal uses 2 amps! While the filament that is the running light on the front of the bike uses HALF an amp (0.5). I have no idea how many amps the module itself uses, it has to use some. I just don't believe in loading the electrical system with unnecessary "Black Boxes" when a simple wiring change will do it.

Order two of the front turn signal light housing (dual filament) and replace the rear turn signal housings with them. You will have to run an extra wire from the running light (inside the rear light assembly) to each new turn signal light. Dual filaments mean that the bulb actually has two filaments inside it. The filament is what lights up. Doing this mod also means you only have to carry one type of bulb as a spare instead of a spare bulb for the front turn signals and a different spare bulb for the rear (oh by the way, the plastic film can that 35mm film comes in is a great way to carry a spare 1157 or better yet a 3496K bulb)Take a look at the bulb chart and compare the bulbs.
When you get the dual filament housings, apply 12vdc to each wire and ground the case of the light. This will let you see which wire lights the turn signal filament (brighest) and which lights the running light (dimmest). One word of advice, we all know Harleys vibrate so solder the splices! Check with your local state authorities to see if you can keep the amber lenses as rear running lights or if you need to order new ones in red. Some states are picky that way.

Also take a look here... http://www.hdforums.com/m_141309/tm.htm

< Message edited by TCSTD -- 3/20/2006 10:42:19 AM >