See also:

Instrument panel light control (rheostat)
The instrument panel lights can be made brighter or dimmer by turning the instrument panel light control knob. ...

Maintenance under Severe Usage Conditions
The following items must be serviced more frequently on cars normally used under severe driving conditions. Refer to the chart below for the appropriate maintenance intervals. R : Replace I : Ins ...

Check spark plugs and ignition system
Inspect your spark plugs as described in section 7 and replace them if necessary. Also check all ignition wiring and components to be sure they are not cracked, worn or damaged in any way. ...