F 250 4WD Super Duty V10-6.8L VIN Y (2006)
B3
Normal Operation
The compass sensor module receives power from the central junction box (CJB) fuse 45 (10A) on circuit 640 (RD/YE) and is grounded through
circuit 676 (PK/OG). The compass sensor module communicates vehicle direction to the instrument cluster to be displayed in the message center
through circuit 702 (WH/BK) and circuit 703 (WH/OG).
Possible Causes
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fuse
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circuit 640 (RD/YE) open
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circuit 676 (PK/OG) open
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circuit 702 (WH/BK) open or short to ground
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circuit 703 (WH/OG) open or short to ground
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compass sensor module
Test C: The Compass Is Inaccurate
PINPOINT TEST C: THE COMPASS IS INACCURATE