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Rear Window Defogger Control Unit Input Test (cont'd) NOTE: Before testing, go to the Troubleshooting Guide (see page ). Be sure to go through self-diagnosis function and ). Multiplex Control Unit (Driver's): 1. Remove the under-dash fuse/relay box (see page ). 2. Remove the driver's unit from the under-dash fuse/relay box (see page ). 3. Inspect the connector and socket terminals to be sure they are all making good contact. • If the terminals are bent, loose or corroded, repair them as necessary, and recheck the system. If any test indicates a problem, find and correct the cause, then recheck the system. Fuse/relay box socket Cavity Wire Test condition Test: Desired result Possible cause if result is not obtained Fuse/relay box socket A8 A13 Ignition switch ON (II) Under all conditions Check for continuity to ground: Check for voltage to ground: • Blown No. 13 (7.5 A) fuse in the under-dash fuse/relay box • An open in the wire • Poor ground (G401, G402 or G251) Main Menu Table of Contents |