Hi, Can someone help me ? I have a 40 ford coupe with led tail lights. There is something making them light very dim. they work ok when you pull the switch. But when there off they glow. what do i need to look for ?
Well, lights only glow when they have some current going to them. Somehow a little current is still being fed to them when the switch is off. Start with the switch, it could be still allowing a small amount of current to flow in the off position. Simply go to the switch and disconnect the tail light wire and see what that does. Don
Sounds like maybe the switch is going bad and is bleeding a little current when it's supposed to be off. I run LED panels in my 55 (got tired of almost getting rear ended), and sometimes they catch the light enough to fool you into thinking they're on. Are you positive they're actually lit?
That is a good point. I p***ed a car in a parking lot the other day and thought his tail lights were on, but it was just the sun illuminating his led's. Have you seen this dim glow in the dark ? Don
Start with a couple of simple checks. Unhook one of the wires from the brake light switch and see if the lights go out. Yes: check the switch with an ohm meter to see if it is letting current flow when it is supposed to be off. No: go to the head light switch and unplug the tail light wire. Somewhere you are getting feed back or power is leaking either through the switch or through a wire connecting the tail light circuit or brake light circuit. It could as minimal as a stray strand of wire from another circuit feeding power to the tail lights when they are off.
check the wiring at the headlight switch.. I had a similar problem where I had mis wired the headlight switch to the front parking lights.. in my situation I noticed that one terminal to the parking lights had 3v's showing on the multimeter.. wasn't enough to actually light the bulb but was enough of a drain to cause me grief.. given that an led only takes 1.5 v to light.. its poss that this could be the issue.
LEDs might be magic. After I turn off my flashlight, the LEDs will come on faintly every time I wave my hand near them. After a few minutes they wont do it
It maybe the grease inside the headlight switch conducting a little voltage to the park terminal. I'm having the same reaction with the highbeam indicator being backfed from the headlamp highbeam filament when the highbeams are off. it may take a new switch or a relay.
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