Equinox AWD V6-3.4L (2008)
Checking Aftermarket Accessories
Checking Aftermarket Accessories
Do not connect aftermarket accessories into the following circuits:
Caution: Refer to Restraint System Service Precautions.
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SIR circuits, all such circuits are indicated on circuit diagrams with the SIR symbol.
Notice: Refer to OBD II Symbol Description Notice.
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OBD II circuits, all such circuits are indicated on circuit diagrams with the OBD II symbol.
Always check for aftermarket accessories (non-OEM) as the first step in diagnosing electrical problems. If the vehicle is so equipped, disconnect the
system to verify that these add-on accessories are not the cause of the problems.
Possible causes of vehicle problems related to aftermarket accessories include:
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Power feeds connected to points other than the battery
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Antenna location
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Transceiver wiring located too close to vehicle electronic modules or wiring
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Poor shielding or poor connectors on antenna feed line
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Check for recent service bulletins detailing installation guidelines for aftermarket accessories.
Circuit Testing
Circuit Testing
The Circuit Testing section contains the following diagnostic testing information. Using this information along with the diagnostic procedures will
identify the cause of the electrical malfunction.
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Using Connector Test Adapters
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Probing Electrical Connectors
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Troubleshooting with a Digital Multimeter
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Troubleshooting with a Test Lamp
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Using Fused Jumper Wires
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Measuring Voltage
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Measuring Voltage Drop
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Measuring Frequency
