Four Wheel Logic

To check air pressure in tires, remove the valve cap, press the gauge firmly onto the valve stem until the hissing stops, and read the PSI number.

Check a VIN number on a car by looking at the driver’s side dashboard corner, the driver’s door jamb sticker, or stamped on the engine block.

You can verify a vehicle’s history without cost by using the National Insurance Crime Bureau (NICB) for theft records, the NHTSA site for safety recalls, or

You can check a starter solenoid by listening for a click, bridging the terminals with a screwdriver, or using a multimeter to measure resistance and voltage

Shake the removed valve. A rattle means it is clean; silence means it is clogged. Also, test for suction at the valve opening while the engine idles.

You can check a car fuse by pulling it out to look for a broken internal wire or by using a multimeter to test for continuity across the metal tabs.

To check a fuel pump, listen for a whirring sound from the tank when turning the key or attach a pressure gauge to the rail to verify psi specs.

To check a crankshaft position sensor, use a multimeter to measure resistance across the terminals or verify the RPM signal while cranking the engine.

To check a car battery with a multimeter, set the dial to 20 volts DC, connect the red probe to positive and black to negative, then read the display for at

You charge an EV at home by plugging the provided cord into a standard 120-volt outlet (Level 1) or installing a 240-volt station (Level 2) for faster speeds.