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*NO RESPONSE FROM OVERHEAD CONSOLE (CONTINUED) For a complete wiring diagram Refer to Section 8W. Possible Causes (Z13) GROUND CIRCUIT OPEN (A919) FUSED B+ CIRCUIT OPEN (F21) FUSED IGNITION SWITCH OUTPUT CIRCUIT OPEN (D25) PCI BUS CIRCUIT OPEN ELECTRONIC OVERHEAD MODULE Diagnostic Test 1. ESTABLISH COMMUNICATIONS WITH THE INSTRUMENT CLUSTER (MIC) Turn the ignition on. NOTE: Ensure there is PCI bus communication with other modules. If not, refer to the PCI Bus Communi- Was the DRB able to I/D or communicate with the MIC? Yes >> Go To 2 No >> Refer to the table of contents and perform the related symptom. Perform BODY VERIFICATION TEST - VER 1. (Refer to BODY VERIFICATION TEST - VER 1.) 2. (Z13) GROUND CIRCUIT OPEN Turn the ignition off. Disconnect the Electronic Overhead Module harness connector. Using a 12-volt test light connected to 12-volts, probe the (Z13) Is the test light illuminated? Yes >> Go To 3 No >> Repair the (Z13) Ground circuit for an open. Perform BODY VERIFICATION TEST - VER 1. (Refer to 8E - 56 ELECTRONIC CONTROL MODULES - ELECTRICAL DIAGNOSTICS DR/DH |