1977 ford f150 wiring harness | eBay Find great deals on eBay for 1977 ford f150 wiring harness. Shop with confidence. Skip to main content 4D 45inch 672W CREE LED Light Bar Spot Flood Combo Work Light Bar+Wiring Harness (Fits: 1977 Ford F-150) Brand New. $45. Was: Previous Price $91. or Best Offer Ford Park Tail Stop Turn Signal Side Light Lamp Bulb Wiring Harness Need brake blinker wiring diagram for a 1977 Ford F150? Ford F-150 | Headlights Tail and Brake Lights. Need brake blinker wiring diagram for a 1977 Ford F150? Auto Zone has online wiring diagrams for that vehicle in the repair instruction section.