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Home >> Lincoln >> 2006 >> Navigator 4WD V8-5.4L VIN 5 >> Repair and Diagnosis >> Heating and Air Conditioning >> Testing and Inspection >> Pinpoint Tests >> Test G: No Communication With The Electronic Automatic Temperature Control Module
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Test G: No Communication With The Electronic Automatic Temperature Control Module

PINPOINT TEST G: NO COMMUNICATION WITH THE ELECTRONIC AUTOMATIC TEMPERATURE CONTROL MODULE


G1-G3:






G3 Continued:






Normal Operation
Under normal operation, the electronic automatic temperature control (EATC) module is grounded through circuit 875 (BK/LB). The EATC module receives battery voltage through circuit 729 (RD/WH) and ignition voltage through circuit 296 (WH/VT).

Possible Causes
- Fuse(s)
- An open in circuit 296 (WH/VT), 729 (RD/WH) or 875 (BK/LB)
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