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Replaced aftermarket under bumper incandescent reverse lights with LED units. Now backup sensor system activates whenever in reverse. Why?

1000 Views 6 Replies 3 Participants Last post by  Steve83
As title says, I had cheap incandescent lamps, mounted under the rear bumper, on my 2000 Excursion 4x4 limited 7.3, for approx. 18 years. I replaced them with these

LED lamps, mounted in the exact same location. The much brighter LED units activate the backup sensor audible tone, every time I go in reverse. Even when I aimed them at the road. I unplugged the lamps and the reverse system operates correctly. Any idea why ? I asked Amazon tech support about it and they know nothing. Thanks.
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They don't, unless the voltage regulator is built REALLY badly. Temporarily wrapping the lights in Aluminum foil that's grounded to the truck would shield them and prove if it's RFI. And LEDs are already diodes, so adding more diodes won't change anything. I'd try adding a noise filter capacitor across the power & ground wires to the lights.
Might you provide an Amazon link or item number, to an appropriate noise filter cap ?
Did you search Amazon for noise filter capacitors in the automotive department?
Steve, it was my understanding...they can also backfeed voltage into the lines...
No, only something that creates voltage higher than the vehicle's charging system can backfeed voltage into the truck: batteries, alternators, piezoelectric crystals, antennas...
LED’s are a form of a diode but not directional...
The definition of a diode is that it only allows current to flow in one direction. So yes, LEDs are directional.
am I mistaken?
...the affect they have on the turn signal indicator bulbs.
They have no effect on other bulbs. Their high resistance can make some modules behave as if the brake lights are always on, but that's really a limitation inside those modules.
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