I was troubleshooting some stalling issues and jumped out the fuel pump relay, and accidentally left it jumped out when I started and ran the truck. Afterwards I had the ignition off, and when i pulled out the jumper wire, I heard this buzzing sound from inside the cab, driver side, near the gas pedal area, towards the firewall.

i copied an image of the circuit below. It seems that whenever the circuit is open, I get the buzzing. So for example when I turn the key from off to on, it goes away for a moment when the relay closes (I put the relay block back in at this point).

Does anyone have experience with what the buzzing might be?

 

Above the gas pedal is Relay Box 1, or AUX Relay box
It has a cover over it and faces Parking brake pedal, several relays inside

None are involved with Fuel system directly so not sure why it would be buzzing
The Battery Saver relay is in there, controlled by GEM

Example of relay layout in Relay Box 1: https://fuseandrelay.com/wp-content/.../Relay-box.jpg

But it changes based on options in your Ranger

Take the cover off and see if you can feel which relay is buzzing

 

Thanks! It was the blue relay for the turn signals. You wouldn't have a wiring diagram that shows the relays in that box would you?

 

Only one I have I posted