1967 Gto Wiring Harness Diagram - Turn signal switch assembly for 67 - 68 Firebird. Complete assembly includes 4 way flasher mechanism and 8 pin harness with correct half circle wiring terminal.. Curt experts, complete product offering and experienced knowledgeable product support. Lowest Prices for Curt products. Expert service, Curt reviews and comparisons, order online at etrailer.com. Holmethorpe Trading Estate - 74 Holmethorpe Avenue - Redhill - RH1 2NL. Telephone: 01737 780 888 Fax: 01737 778 999 e: [email protected] We are open 9am to.