Positive Ground with Negative Ground Lights (2017)

swooshdave · Apr 28, 2021

marshg246 said:
And of course, the two at the battery Red becomes - and Brown/Blue becomes +.

Thank you for the clarification. Some folks may have the rec/reg going to the battery directly so of course it depends.

texasSlick · Apr 28, 2021

I bought an 1157 type LED that was supposed to work with either polarity. Tail or running light worked as expected, but when brake applied, the brake light did not get any brighter. Solution was to insert a 27 Ohm, half Watt resistor in series in the running light circuit, then all was well.

Slick

Tornado · Apr 28, 2021

I'm running an LED lightboard array in my Lucas housing on my +ve earth 850 Commando....from these guys:

Classic Car and Motorcycle dynamo rebuilding and Electronic Dynamo Regulators

Dynamo rebuilding and conversion. Two brush conversion. Electronic regulators.LED light bulbs and light boards for classic and vintage cars and motorcycles

www.dynamoregulatorconversions.com

Desmond Tui · May 13, 2022

swooshdave said:
Is it possible to just swap the wires on the tail light so you can use a negative ground LED bulb on a positive ground bike?

Logic says the electrons won't know the difference. Experiences says to ask people smarter than me.

#askingforafriend

Yes I am planning to do just that! the trick is to buy the Led that you can resolder the wires and terminals.

kommando · May 13, 2022

Or feed the LED through a bridge rectifier

Random one off ebay, you need to check it can handle 12V and the LED ampage.

311229025416: Search Result | eBay

Find great deals on eBay for 311229025416. Shop with confidence.

www.ebay.co.uk

Bike gets connect to the + and - terminals, LED to the AC any way round you like.

Tornado · May 13, 2022

Or just buy an led which is not polarity dependant. Fairly common these days.

Positive Ground with Negative Ground Lights (2017)

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