John Deere 110 Wiring Harness for sale | eBay Get the best deal for John Deere 110 Wiring Harness from the largest online selection at eBay. Browse your favorite brands affordable prices free shipping on many items. HAPCO - Wiring Harness Wiring Harness; Used Engines; John Deere Used Parts; Main Wiring Harness For 1968 model 110 serial # 100001-130000 For 1966-68 model 112 Tecumseh serial # up to 130000 Wire Harness_6P. Price: $149. Complete wire harness For model 120 Serial numbers up to 7500 Wire Harness_12P.