does it have two yellow lines surrounding it? kinda circling it? if so that's your tire pressure light
it means that the handbrake is on
Is inside the distributor
It means there is a problem with your transmission.
Its the parking brake light.
it is inside the distributor
The heater core is under the passenger side of the dashboard inside of the housing that holds and covers most of the A/C an Heating system components. IT is NOT easy to change.
by opening the inside the door
Hazard lights (flashers)
Most voltage regulators are inside the alternator.
The oil pump for a Nissan Altima is located inside the oil pan and it is attached to the oil pickup tube. The oil pump is responsible for circulating the oil in the car.
Bolted to the engine inside the oil pan
The fuse box diagram for the 1994 Nissan Altima is often located on the inside cover of the fuse box. You can also find this diagram online at places like Nissan Forums and Nissan Help where people upload the diagrams.