I have a similar issue. I already changed the starter and starter relay, to a new one. I checked the battery it's 12.14v output. All lights works, radio works. When I try to start it, you hear one click, NO crank ( at all), NO multiple clicking sound like battery is dying but you hear humming when holding the ignition to start. I tried moving the vehicle and tried to start it again ( nada). I tried starting I on neutral, nothing. The 4runner was just working 4 hours ago, I came home Parked it and it won't start anymore. Any thoughts? Thank you for your expert assistance or knowledge to share 🙂 at this point I hit rock bottom coz I have no idea what else to check 🤷