ATV Repair and Maintenance Trouble unplug wiring harness October 5, 2015 I tried and tried, cannot unplug wiring harness near the black 4×4 selector where the thumb throttle is. I removed a grey plastic piece but cannot unplug the harness ??/ Please help….. Share this:Click to share on Twitter (Opens in new window)Click to share on Facebook (Opens in new window) Related