how can I tell if my car's speedometer is not working?

Answer 1

Look at it. If you're stopped, and it reads 70, it isn't working.
Look at it. If you're keeping up with traffic in a 65 zone, and it reads 20, it isn't working.
Look at it. If the needle sits on zero, or any other number all the time, it isn't working.

Answer 2

Speedometers are generally correct. The newer vehicles are all run through your cars computer and not from gears and cables like the older cars. This leaves little room for mistakes.

Answer 3

Ask a Police Officer to radar you when you see one on the side of the road somewhere. Tell him you don't think it's working properly an wan't to check it, ask him if he could possibly radar you driving by him and if this is a go, then keep your foot at the same level at all times on the gas pedal once you start rolling down the street, fluctuating the gas pedal will only fluctuate your speeds, and readings won't be accurate.

Answer 4

When the car is moving, the speedometer is not.

Answer 5

1. When you are driving, it says 0
2. go find a highway with mile markers. Set the cruise or drive exactly 60MPH (in the right lane please) Start a stop watch at marker 1 and then drive for 5 markers you should make it in exactly 5 minutes that is 60MPH

Answer 6

If you're doing 90 and it says 0, that's a big clue

Answer 7

The man with flashing lights and sirens stops you and gives you a speeding ticket.

Answer 8

Check it with one of thouse your speed is radar screens or ask a cop to radar you

Answer 9

get your friend to follow you and talk on cell phone see if your both going same speed