Electrical System


The instruments usually include the speedometer, tachometer, fuel gauge, oil pressure gauge, coolant temperature gauge, and voltmeter or ammeter. Other instruments may also be included depending on options and the manufacturer. Some instruments work together with a warning light to alert you of major changes in a system's status. This may include low oil pressure, low fuel level, and excessive coolant temperature.


The instruments provide vital information about your car's operating status.

Maintenance Tips/Suggestions

Take the time to review your vehicle's owner's manual so you have a clear understanding of what the instruments and warning lights represent. Many warning lights come on when the ignition switch is turned to the on position as a bulb check. Generally, a light that stays on or comes on while driving means a problem in that system. Problems with instruments usually fall into two categories: instruments that don't work and instruments that display inaccurate readings. If you are experiencing either of these issues, have your vehicle's instruments checked by a qualified service technician.

vehicle diagram