How do I rest my low tire pressure indicator?

Check the spare tire also.

Just had an '08 Taurus run through the used car dept. , 20 PSI in 'donut' in trunk , aired up to 60PSI (spec.) and checked the owners manual , said it (the car) then needs to be driven at at least 20 MPH for about 2 minutes for the light to reset.---IT WORKED.