Navigator 4WD V8-5.4L (2010)
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Are the voltages greater than 10 volts?
Yes
GO to L2.
No
VERIFY the Smart Junction Box (SJB) fuse 38 (20A) or fuse 40 (20A) is OK. If OK, REPAIR the circuit in question. If not OK, REFER to the Wiring
Diagrams to identify the possible causes of the circuit short. CLEAR the DTCs. REPEAT the network test with the scan tool. See: Diagrams/Electrical
Diagrams/Diagrams By Number
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L2 CHECK THE AUDIO DSP MODULE GROUND CIRCUITS FOR AN OPEN
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Ignition OFF.
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Disconnect: Negative Battery Cable.
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Measure the resistance between the audio DSP module, harness side and ground as follows:
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Are the resistances less than 5 ohms?
Yes
GO to L3.
No
REPAIR the circuit. CONNECT the negative battery cable. CLEAR the DTCs. REPEAT the network test with the scan tool.
