800.MACTOOLS
35
Connect:
•
Black test probe to the negative (-) battery post.
•
Red test probe to the battery case around the positive (+) battery post: DO NOT TOUCH THE POST.
A reading of more than 0.5V indicates excessive surface discharge.
Clean the battery surface thoroughly if this has not been done and retest.
If you continue to get a reading of more than 0.5V, the battery is defective and should be replaced.
Battery No-Load Test
A fully charged battery will display at least 12.6V. The following test checks for battery charge state. Since
voltage tests only show the charge state and not the battery condition, you should also perform a load test to
indicate the battery’s performance.
CAUTION
THE IGNITION SWITCH MUST BE OFF WHEN CONNECTING OR DISCONNECTING BATTERY CABLES TO
PREVENT DAMAGE TO THE VEHICLE COMPUTER.
Positive
battery
cable
Negative
battery
cable
Black
Red
12V battery
