ford 7.3 glow plug harness | eBay Find great deals on eBay for ford 7.3 glow plug harness. Shop with confidence. Skip to main content. eBay Logo: Shop by category. Diesel Glow Plug Wiring Harness For 1994-1996 Ford F250 7 V8 DIESEL X814YS (Fits: Ford) 1995. Brand New. $31. Buy It Now. Free Shipping. Watch. How to make your own glow plug wiring harness - Ford Truck Dec 14, 2017Pre-Power Stroke Diesel (7 IDI & 6) - How to make your own glow plug wiring harness - While replacing my glow plugs, I ran into the need for a new wiring harness when my old one literally crumbled in my hands. This procedure should work for all 7.3 as far as I know, however I will say I have a 93. You may need..