Its not working and when you press the trigger there is a smell of burn

Seems battery go out make it sure bettety outp volt it must be 11-12 v if not then battery need to replace

look at the windings in the housing and if they are black not bright brown they will be burnt out Also smell the motor and you will tell if it is burnt as it will smell burnt.

You may have damaged the brush holder, broken some tabs off that hold the field in place or knocked the armature out of alignment. All of these parts work under very close tolerances and if out of alignment will lock the motor up. If you pull the trigger the light will be able to work but since the armature can't turn, heat will build up in the motor very fast and you'll get the burning smell. You may get away with replacing the brush holder or housing but if the burning smell is actually coming from the armature, you'll have to replace that.

The motor has jammed and burned out. It is probably not worth trying to repair.
If it is still within the warranty period take it back for replacement under guarantee

check wire connections

It's probably the switch; mine judders and works kind of. Slight burning smell coming from it, dismantled it to discover that the switch has started to burn out, so far no luck finding a replacement.........

JCB are totally useless, no help from their support phone number!

18v is one of the newer models, correct? And the drill is new? If so there will be some smell as the motor breaks in. The srmsture is varnished as well as the windind for the commutator. The first few times it get s warm/warm from a heavy load, You will smell it. I would say there is nothing wrong at this point.Do not overload the motor and avoid drilling at low speeds. Use the variable trigger at low speed only for starting a hole. If you are driving screws start the screw,then full trigger driving it in. Good Luck, Ned

Open the dryer door (right after the breaker trips) and check for a burned smell. If it smells in the dryer, you probably have a direct short in the dryer wiring. Check for a burn smell at the wall socket. There may be a short in the socket itself, but not likely unless a mouse is lying across the contacts in the wall.
If everything checks ok replace the circuit breaker if this is an older home. Circuit breakers weaken after years of use. A 30 amp circuit breaker will trip at a much lower amperage after a period of years especially if it has tripped often.

Re: Burned trigger switch: call the number on the drill (800.590.3723) and tell them what happened. They will offer to send you a new switch or have you send the drill in for replacement of the switch--although the person I talked with said they would probably just replace the whole drill.