Battery Drain Test; Battery Load Test - EDI TSG-416 Service Manual

Battery Drain Test

WARNING: REFER TO CAUTIONS & WARNINGS AT
THE BEGINNING OF THIS SECTION.
A defective component or wiring defect may be causing
a small current drain that is less than the fuse rating for
the circuit so the fuse does not open. Perform the
following to determine if an excessive drain is occurring:
NOTE: Batteries should be fully charged for the following
test.
WARNING: DO NOT ATTEMPT THIS TEST ON A
LEAD-ACID BATTERY THAT HAS RECENTLY BEEN
RECHARGED. EXPLOSIVE GASES MAY CAUSE
PERSONAL INJURY. FAILURE TO FOLLOW THESE
INSTRUCTIONS MAY RESULT IN PERSONAL
INJURY.
CAUTION: To prevent damage to the meter, do not
crank engine or operate accessories that draw more
than 10A.
1. Allow the engine to sit with the ignition off for at
least 40 minutes to allow the GCP to power
down.
2. Connect a fused (10A) jumper wire between the
negative battery cable and post to prevent the
GCP from resetting and to catch capacitive
drains.
3. Disconnect the negative battery cable without
breaking the connection of the jumper wire.
NOTE: It is very important that continuity between the
negative battery cable and post is not broken. If it is, the
entire procedure must be repeated so the GCP can
power down again.
4. Connect an ammeter between the negative
battery cable and post. The meter should have a
10 amp capability.
NOTE: If after this next step, the meter settings need to
be switched or the test leads need to be moved to
another jack, the jumper wire must be reinstalled to
avoid breaking continuity.
TSG‐416 CHARGING SYSTEM

Battery Load Test

WARNING: REFER TO CAUTIONS & WARNINGS AT
THE BEGINNING OF THIS SECTION.
06 ‐7
5. Remove the jumper wire and note the amperage
draw:

There should not be any more than 50
mA (0.050 amp) draw.

If excessive, remove fuses one at a time
until the circuit with the excessive draw
is located.

Use the wiring diagram to locate any
circuits that do not pass through the
fuse box.

Disconnect the generator connections to
check for an internal short causing an
excessive draw.
1. Disconnect both battery terminal cables. Check
the battery visually.
2. Examine the hydrometer eye (if no eye go to
next step).

Eye shows green - go to step 4.

Eye shows dark - recharge, then go to
step 4.

Eye shows yellow - replace battery.
3. Apply a 300 amp load for 15 seconds. Turn off
load and wait one minute.

If 12.4 volts or more - go to step 4.

If less than 12.4 volts - recharge, then
repeat step
4. Apply a test load equal to 50% of the battery
CCA rating at - 17.8° C (0°F). After 15 seconds,
with the load still applied, measure and record
terminal voltage ___________. Turn the load
OFF.
5. Estimate the battery temperature. If measured
voltage does not meet or exceed the value
shown in the following table, replace the battery.
6. Clean all cable ends and terminals of the battery
with a wire brush.