kaiserserser

Hey guys, thanks for all of the quick help and suggestions! I actually lucked into finding the issue. I saw online sometimes relays will rattle like that if they're getting a little power but not enough to lock in place. I started checking all of the connections from the battery toward the fuse box and found one spot that looks like it got a little frayed/pinched at some point, fixed that and the buzz went away and power came back to all systems! Thanks again!

Hi Steve, I unplugged the relay/buzzer and still seem to be getting no power to anything. I'm curious with it being right by the fuse box if it's some sort of master relay or something (I'm a complete electrical novice) However, if the buzzing and lack of power aren't related I'll be curious what the separate issues are, definitely weird that this random unmarked buzzing box with no part number seems to get power no matter the key position but nothing else gets any power ever. Really appreciate any help/advice you have to offer, definitely frustrating hunting down electrical gremlins!

Thanks Steve! It's a 1973 240. It's odd if it's ignition related that it buzzes regardless of key position.

Here are a few pics, it was attached just behind and to the left of the fuse box. One of the pics shows what it looks like inside the brass casing (After taking the pic I closed it back up and plugged in and still makes the buzz). Two black wires and a green wire going in.

Hi Guys, I had pulled my engine to do some work on it and when I put it back in and attached the battery leads, I started getting this buzzing noise coming from the console area and nothing else seemed to be getting any power. I figured out the buzzing noise was coming from a little brass box in the console area to the left of the fuse panel. From what I can tell it seems like a relay of some sort with three prongs and a fitted plug with 3 wires connected to it, but no part numbers on it. A few specifics: The buzzing is 100% is coming from inside that little box that seems to be a relay. If I unplug that box/relay, the sound immediately stops, but I still have no power to lights/ignition etc If left plugged in, the buzzing noise persists regardless of key position. . Three wires plug into this box/relay but I can't tell where they come from. If anyone knows what might be causing this weird scenario I would really appreciate your help! Thanks, Jon