If the battery is okay but the engine still cranks slowly or not at all,
it is time to check the starting system. The starter could have
failed, or excessive resistance in the wires and their connections can prevent
the
proper voltage from reaching the starter causing slow or no cranking.
Check for loose or dirty cable connections or for battery cables with wires
that are too small in diameter (gauge). If the starter solenoid
clicks but the starter does not operate, it is recommended to
use a voltmeter to determine if the proper voltage is reaching the solenoid
through the
starter control circuit. If the solenoid is receiving the proper
voltage and the starter does not crank, then the solenoid ground
may be
bad, the
solenoid contacts may be damaged, or the starter is dead. If
all connections are clean and tight and the voltage drop exceeds 0.2 volts,
the solenoid
should be replaced. If everything else checks out as okay, measure
the starter draw and amperage, if incorrect, replace the starter.
If the
solenoid is
defective but attached to the starter motor, it may be best for
you to replace the complete starter and solenoid assembly- there's
a very good chance the
starter will die very soon along with the solenoid. Why risk
a comeback and more delay getting the vehicle up and running.
