Nasty noise problem

SADLY WE HAVE NO TRACTORS OF THAT MAKE HERE

The volume control in this unit is most likely an Encoder and these have a nasty habit of getting dirty inside and false reading back to the computer that runs the receiver. In the past , I've had good results opening up the units and spraying what's called De-Oxit D5 into that volume control and rotating the thing a couple dozen times. . De-Oxit can be found on Amazon or Radio Shack

This sounds like one of this nasty problems with the solder points. One of them might be faulty so sometimes there is a contact sometimes not. You could try to locate it by knocking gently with the plastic end of a screwdriver on the pcb. If vibrations cause the noise you could check all solder points optical or just resolder them. There are not too many. Also check all potentiometers! As they are mechanical parts vibration caused issues can be found here very often especially on their solder points.

Well depending on the noise. If it makes a squeel, chatter, or grind thats the brakes. If it makes a nasty THUNK if you stop or accel hard or sometimes while your turning then I would say the ball joints. Changing them on a f150 is a pretty easy task either way.

depending on which doors are 'making the nasty noise'... what you are hearing is/are the door 'LOCK/UNLOCK' actuators. They are AGING and if you choose, replace them.

My Sony a200 camera also makes a nasty noise when switched on, and also when I switch it off.

With the nasty noises and no oil pressure I think the engine may have trashed the crankshaft bearings and probably the connecting rod. If this has been going on for very long, the crankshaft may be trashed also. Take it to a dealer and let them listen to it for confirmation.

Switch to Meeting mode and then adjust volume etc - the keypad nasty noise is switched off in this mode