Hombre S Regular Cab 4WD V6-4.3L (1999)
Body Control Module: Service Precautions
IMPORTANT: The Probing of electrical circuits without the use of Connector test adaptor Kit (J 35616) could cause damage to electrical components
and connectors. Do not use a test lamp in order to diagnose the BCM electrical system unless you are specifically instructed by diagnostic procedures.
Do not use a test lamp in order to diagnose the BCM electrical system unless you are specifically instructed by diagnostic procedures. Use the J 35616-A
when diagnostic procedures require probing of connectors. Refer to Special Tools.
See: Tools and Equipment
The BCM will withstand normal current draws associated with vehicle operations. Avoid overloading any circuit. When testing for opens or shorts, do
not ground or apply voltage to the BCM circuits unless you are instructed to do so. These circuits may only be tested using a J 39200 Digital Multimeter
(DMM) or equivalent. Test electrical circuits using a J 39200 DMM, while the BCM connectors remain connected to the BCM or the recommended
breakout box. Do not remove or apply voltage to the BCM when the ignition switch is in the RUN position. Turn the ignition switch to the LOCK
position before removing or connecting any of the following electrical components:
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Battery cables
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Fuses
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Connectors
Follow the instructions whenever a BCM removal or replacement procedure is performed. When servicing the BCM system, use the following
guidelines:
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Always DISCONNECT the brown (BRN) BCM connector FIRST.
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Always CONNECT the brown (BRN) BCM connector LAST.
The BCM may set codes when the ignition switch is in the OFF position. Disconnecting the electrical connectors from the BCM will set DTC(s).
The BCM may require a 20 minute (1216 second) time period in order to power down when all of the following conditions exist:
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The ignition switch is turned to the OFF position.
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The BCM is not receiving any active inputs.
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The BCM does not receive any active inputs for 20 minutes.
