Model A Ford Garage ~ Model A Electrical Wiring Diagram Model A Ford Garage Electrical Wiring Diagram. Click image to enlarge! Pictured above is the wiring diagram for the Model A as illustrated in Dykes Automobile and Gasoline Engine Encyclopedia Supplement, page 16. Note that this image is the corrected version, not the one commonly seen on the internet having the internal mistake in the starting ford model a wiring harness | eBay Ford Model A Wiring Harness Sections. Pre-Owned. $30. or Best Offer +$5 shipping. 1928-1931 Model A Ford Terminal Box to Cutout & Starter Switch Wiring Harness . Ford Battery Cable Engine Headlight Dash Wiring Harness Hose Tubing Clips 4pcs A (Fits: Ford Model A) Brand New. $7. FAST 'N FREE. Buy It Now. Guaranteed by Wed, Jul. 10.