Harbor Freight Tools 91129 Battery Charger User Manual


  Open as PDF
of 7
 
Page 7SKU 91129 For technical questions, please call 1-800-444-3353.
Starter Motor Test
If starting your vehicle is difficult, you may have unnecessary starter motor draw, which
dramatically shortens battery life. This test identifies starter motor performance.
1. Make sure your engine is running at normal operating temperature, and that the battery
is fully charged and in good condition.
2. Connect the Red Clamp (+) to the positive (+) terminal post on the battery. Connect the
Black Clamp (-) to the negative (-) terminal post on the battery.
3. Turn the Load Knob (C) counterclockwise to the Off position.
4. Disable the engine to make sure the car will not start. Refer to your vehicle’s service /
technical manual.
5. While watching the DC Volt scale (see page 6), crank the engine briefly to determine
the voltage reading during cranking.
A display reading of 9 volts or less indicates excessive current draw. This may be
caused by a bad connection of a failing starter motor, or, the battery is too small for the
vehicle’s requirements. Consult a qualified mechanic.
6. When starter motor test is complete, remove Black Clamp (-) from battery first; then
remove Red (+) clamp.
INSPECTION, MAINTENANCE, AND CLEANING
1. Periodically check all nuts, bolts, and screws for tightness.
2. Store in a clean, dry location.
3. Clean the outside of the unit with a damp cloth. Never use solvents to clean any parts
of this tool. Use compressed air to blow out debris from the load vents. Allow tool to
dry completely before use.
4. After each use, clean the Cable Clamps of any possible battery electrolyte. Apply a
thin coat of silicon grease to prevent corrosion.
Replaceable Parts
The Carbon Pile Load Tester has no replaceable parts.
REV 04/05
 previous