Fisher-Price POWER WHEELS 74310 Guide De L'utilisateur page 35

Problem
Vehicle runs in low speed, but does
not run in high speed (Please Note:
The vehicle is designed to operate
in low speed only in reverse.
When the foot pedal is pressed
only one rear wheel spins
Sometimes the vehicle doesn't
run, but other times it does
Possible Cause
High speed lock-out not disconnected
Operation of vehicle in low speed
Loose wire or connector
Solution
The vehicle was pre-set to run only in low speed. To allow the
vehicle to run in low and high speed, you must disconnect the
High Speed Lock-Out. Follow the instructions on page 30 to
remove the High Speed Lock-Out screw.
It is possible that only one rear wheel may spin when both rear
wheels are raised off the ground and the vehicle is in low speed.
This does not necessarily indicate a problem. Check for proper
operation of the drive system by raising the rear wheels off the
ground and pressing the foot pedal. If only one rear wheel spins,
carefully press your hand on the spinning wheel to slow it down.
The other rear wheel should begin to spin. If the other rear wheel
does not begin to spin, there may be a problem with the vehicle.
Contact Power Wheels ® Customer Service.
Check all wires around the motors and all connectors to
make sure they are tight.