Fisher MM1 Wiring Diagram | PlowSite Nov 25, 2017Fisher MM1 Wiring Diagram. Discussion in 'Fisher Engineering Discussion' started by 05~2500HD, Feb 2, I have the four port module and all misc. wiring but a detailed description or wiring schematic would be a world of help. (working 3 port iso module and working 3 pin and light harness.) Hooked it all up today and no matter how i do itFisher MM1 wiring/solenoid | PlowSiteFeb 06, 2014Calling all wiring wizards - Help with fisher MM1Dec 20, 2013MM1 wiring | PlowSiteNov 23, 2008Fisher MM1 and MM2 Plow Parts new and old!! | PlowSiteNov 09, 2008See more results Fisher Plow Harness | eBay WESTERN, FISHER SNOW PLOW 3 PORT LIGHT WIRING HARNESS HB-3 & H11 HEADLIGHTS. #29498. Condition is Used. I have 6 of these buy 1 or all 6. Message me if u need more 9144898673 This wiring will wo.. WESTERN FISHER SNOW PLOW 4 PORT HEADLIGHT WIRING HARNESS 28030 NEW SOME HB-3 HB4.