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8. Install the scan tool and perform the power down now feature from the BCM output menu. After performing this function the scan tool can be powered off or disconnected, then wait an additional 5 9. Set the J 39200 Digital Multimeter to the 10 A scale. 1. Connect a jumper wire with an in-line 10 A fuse J 36169-A to the terminals of the test switch. 2. Turn the test switch to the OFF position. 3. Wait 10 seconds. 4. If the fuse does not blow, the current is less than 10 A and the ammeter can be used safely. 5. Turn the test switch to the ON position before the fused jumper wire is removed and the multimeter is installed. 10. Connect the ammeter to the test switch terminals. 11. Turn OFF the test switch. This allows the current to flow through the ammeter. 12. Wait at least 60 seconds, then check the current reading. z When there is a current reading of 2 A or less, turn ON the test switch, this maintains continuity in z Then, switch the meter down to the 2 A scale, for a more accurate reading, when the test switch is 13. Take the reading in milli-amps. 14. Note the battery reserve capacity. Refer to Battery Usage . z Divide this number by 4. z Compare this to the multimeter reading. z The current drain should not exceed this number. z Example: If a battery has a reserve capacity of 100 minutes, the current drain should not exceed 25 15. When the current draw is too high, remove the electrical system fuses one at a time until the draw returns to a value less than or equal to specifications. is turned off. Refer to Body Control System Description and Operation in IMPORTANT: If an ammeter other than the J 39200 is used, ensure that the vehicle does not have a high current drain that would damage the ammeter when NOTE: Always turn the test switch knob to the ON position before removing each
2004 Hummer H2 2004 ELECTRICAL Engine Electrical - Hummer H2
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