TEST OR INSPECTION
Remove rings, wristwatches, neck chains, and any other jewelry before working
around vehicle. Jewelry can catch on equipment and cause serious injury. Jewelry
and tools may short across electrical circuits and cause damage to equipment, or
severe burns or electrical shock to personnel.
Crew cab wire harness wire 1105/1106 has a 3 amp inline diode located at dome light.
Red multimeter lead must be attached to wire 1106 at dome light and black lead must be
attached to wire 1105 at door switch for reading to be accurate.
Turn battery disconnect switch to OFF position (WP 0007). Disconnect driver side crew
cab wire harness door switch connector (WP 0385). Cut crew cab wire harness wire
1106 at driver side dome light butt splice connector. With a test lead set, check for
continuity across crew cab wire harness wire 1105/1106 from driver side dome light butt
splice connector to crew cab wire harness driver side door switch connector wire 1105.
If continuity is not present, replace crew cab wire harness (WP 0446).