I decided to replace the 2 reverse bulbs on my 2008 Outback with LEDs. The original incandescent bulbs are type 921 and I got an LED "equivalent". Swapped the bulbs and then switched the ignition switch to " ON", but didn't start the engine - then moved (auto) transmission into "R" position. I hear a buzzing noise from under the hood. I think: "Great, these LEDs aren't drop in replacements". Turn key to OFF and put original incandescent bulbs back in, repeat the key/transmission and STILL get the buzzing noise. Then I put the LED bulbs back in started the engine and shifted into " R" with the brake applied - the noise is there, but barely percievable over the sound of the engine.
So it doesn't seem related to the bulb and may have been there before as I usually start the engine before shifting into Reverse and usually have the radio on and likely would never notice it. Any ideas what might be the cause? I didn't open the fuse & relay compartment under the hood but it sounds like it's emanating from under the engine.
So it doesn't seem related to the bulb and may have been there before as I usually start the engine before shifting into Reverse and usually have the radio on and likely would never notice it. Any ideas what might be the cause? I didn't open the fuse & relay compartment under the hood but it sounds like it's emanating from under the engine.
