Signal Wire Continuity

Check signal return wire (Gray/Red), diagnostic wire (Yellow/Black) and Star Tester wire (Dark Blue) at ARC/EVO diagnostic connector for damage. If wires are damaged, repair as necessary. Test continuity of Yellow/Black wire to chassis ground. If no continuity, repair open in Yellow/Black wire to pin No. 46 of ARC module. If no problems, proceed to QUICK TEST D3.