2003 Chrysler PT Cruiser Vehicle Accessories | etrailer Troubleshooting Trailer Wiring Harness Shorts Out Every Couple Years on 2003 Chrysler PT Cruiser What usually causes taillight converter wiring harnesses like the part # 118462 to break is a short on the trailer wiring or they get overdrawn. Wiring Problems of Chrysler Pt Cruiser - carproblemzoo The wiring harness melted, which caused the multifunction switch to burn out and running tail lights to not work properly. Replaced multifunction switch and burning smell came from steering column. Pulled new multifunction switch and noticed melted connectors. See all problems of the 2003 Chrysler Pt Cruiser .