LED side marker lamps

What is the amps draw of the lamps? What is the amps rating of the flasher?

You must put a power resistor (maybe 10Watt) in shunt with the new bulb so the resistor + LEDs takes the same power as the old bulb. If you think you've problems then talk to the poor 'ole truck manufacturers who use computer controlled CAN bus polling systems programmed only to detect incandescent bulb failures. john

I've heard of a "Heavy Duty" flasher that doesn't depend on the load current to give it its flash rate. This is the kind that will still flash if you lose one of the bulbs (i.e., front or rear), albeit probably slower, so you'll know you have a bulb out.

Good Luck! Rich

The phrase I remember from an owner's manual is "variable-load flasher." They were originally designed for vehicles with trailers.

I know the local auto parts dealer has a "Heavy Duty Electronic Flasher" that uses a timer and a relay to set the flash rate, not a bimetallic strip.

Jim

The primitive, electromechanical, bimettalic strip flashers are dead simple, cost nothing, last for ever and have built in bulb failure indication. Difficult to emulate using modern technology. The number of homebrew transistorised versions I've seen is legion. In not one of them, have the authors figured a way to provide useful bulb fail alarm. (or even recognised it came as a standard feature of the mechanical versions). john