Hummer H2. Manual — part 1165
Fig. 6: Connecting Battery Terminal Jumpers
Courtesy of GENERAL MOTORS CORP.
IMPORTANT: Some vehicles have a battery remote positive stud. ALWAYS use the
battery remote positive stud in order to give or to receive a jump start.
Consult the vehicle's owner's manual for proper connections.
2004 Hummer H2
2004 ELECTRICAL Engine Electrical - Hummer H2
3. Attach the end of one jumper cable to the positive terminal of the discharged battery.
4. Attach the other end of the first cable to the positive terminal of the booster battery.
5. Attach one end of the remaining jumper cable to the negative terminal of the booster battery.
6. Make the final connection of the negative jumper cable to the block or suitable bracket connected directly
to the block, away from the battery.
7. Start the engine of the vehicle that is providing the jump start and turn off all electrical accessories. Raise
the engine RPM to approximately 1,500 RPM.
8. Crank the engine of the vehicle with the weak battery.
If the engine does not crank or cranks too slowly, perform the following steps:
1. Turn the ignition OFF.
2. Allow the booster vehicle engine to run at approximately 1,500 RPM for 5 minutes.
3. Attempt to start the engine of the vehicle with the discharged battery.
9. Reverse the steps exactly when removing the jumper cables. The negative battery cable must first be
disconnected from the engine that was jump started.
CHARGING SYSTEM TEST (CS/AD/SI GENERATORS)
Charging System Test (CS/AD/SI Generators)
NOTE:
Do not connect the negative charger lead to the housings of other vehicle
electrical accessories or equipment. The action of the battery charger may
damage such equipment.
Step
Action
Value
(s)
Yes
No
1
Did you perform the Engine Electrical Diagnostic System
Check?
-
Go to
Step 2
Go to Diagnostic
System Check -
Engine Electrical
2
Start the engine. Observe the charge indicator on the
instrument cluster (IPC).
Does the charge indicator illuminate or message center (DIC)
display a charging system message?
-
Go to
Step 3
Go to Symptoms -
Engine Electrical
3
1. Turn OFF the ignition.
2. Connect the red lead of the J 41450-B Universal CS
Generator Test Harness to the generator output
terminal.
3. Connect the black lead of the J 41450-B to the metal
IMPORTANT:
The green POWER lamp of the tester should remain
illuminated while the tester is being used.
-
2004 Hummer H2
2004 ELECTRICAL Engine Electrical - Hummer H2
generator housing.
Does the green POWER lamp on the tester illuminate?
Go to
Step 6
Go to Step 4
4
Measure the voltage from the output terminal of the
generator to the generator metal housing.
Does the voltage measure equal to the specified value?
12.0 V
Go to
Step 14
Go to Step 5
5
Measure the voltage from the output terminal of the
generator to the battery negative terminal.
Does the voltage measure equal to the specified value?
12.0 V
Go to
Step 12
Go to Step 11
6
1. Turn OFF completely the load tool before connecting
or disconnecting a carbon pile load tester to the
battery. Otherwise, sparking at the terminals could
cause battery gasses to explode.
2. Connect a carbon pile tester to the vehicle.
3. Connect an inductive ammeter to the output circuit of
the generator.
4. Disconnect the generator harness connector.
5. Locate the matching harness connector on the J 41450-
B , and connect the connector to the generator.
Does the red DIAGNOSTIC lamp on the tester illuminate?
IMPORTANT:
Ensure that all generator output circuit wires pass
through the inductive probe.
-
Go to
Step 7
Go to Step 13
7
1. Start the engine and allow it to idle for 30 seconds.
2. Increase the engine speed to 2,500 RPM.
Does the red DIAGNOSTIC lamp on the tester illuminate?
-
Go to
Step 15
Go to Step 8
8
1. Maintain the engine speed at 2,500 RPM.
2. Turn ON the load of the carbon pile tester and increase
the load until the generator output is equal to the Load
Test value given in Generator Usage.
Does the red DIAGNOSTIC lamp on the tester illuminate?
IMPORTANT:
If the generator is not capable of producing the
Load Test amps, operate the generator at it's
maximum possible output.
-
Go to
Step 15
Go to Step 9
1. Maintain the engine speed at 2,500 RPM and continue
2004 Hummer H2
2004 ELECTRICAL Engine Electrical - Hummer H2
CHARGE INDICATOR ALWAYS ON
9
to operate the generator at the load test value.
2. Measure the voltage drop from the output terminal of
the generator to the positive terminal on the battery.
Refer to Circuit Testing and to Wiring Repairs in
Wiring Systems.
Does the voltage measure greater than the specified value?
0.5 V
Go to
Step 11
Go to Step 10
10
1. Maintain the engine speed at 2,500 RPM and continue
to operate the generator at the load test value.
2. Measure the voltage drop from the battery negative
terminal to the metal housing of the generator. Refer to
Circuit Testing and to Wiring Repairs in Wiring
Systems.
Does the voltage measure greater than the specified value?
0.5 V
Go to
Step 12
Go to Step 16
11
Repair the high resistance or an open in the output circuit of
the generator. Refer to Circuit Testing and to Wiring
Repairs in Wiring Systems.
Did you complete the repair?
-
Go to
Step 16
-
12
Repair the high resistance or open in the ground circuit of the
generator. Refer to Circuit Testing and to Wiring Repairs
in Wiring Systems.
Did you complete the repair?
-
Go to
Step 16
-
13
1. Disconnect the J 41450-B tester harness connector
from the generator, but leave the alligator clips
connected so that the green POWER lamp remains
illuminated.
2. Connect a jumper lead, with an in-line 100-ohm
resistor between the J 41450-B tester harness
connector terminal B of the generator and a good
ground. Refer to Engine Electrical Connector End
Views .
Does the red DIAGNOSTIC lamp illuminate?
-
Go to
Step 15
Go to Step 14
14
There is a problem with the J 41450-B . Refer to the
manufacturers instructions, how to test the J 41450-B for
proper operation.
Has the J 41450-B tester been replaced?
-
Go to
Step 3
-
15
Replace the generator. Refer to Generator Replacement .
Did you complete the replacement?
-
Go to
Step 16
-
16
Operate the vehicle in order to verify the repair.
Did you correct the condition?
-
System
OK
Go to Step 2
2004 Hummer H2
2004 ELECTRICAL Engine Electrical - Hummer H2
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