Walhonding520 25 #1 Posted July 26, 2018 I am having trouble with my safety interlock switches. Working on pinpointing which one is the problem, or if more than one of them. My seat switch is about to be bypassed. Which two colored wires on the harness need to be jumped? I am also not sure if my motion lever is working correctly. When I turn the key on and to start, the PTO light, parking brake light, and seat switch light (when it is working) will all come on if that switch is tripped. I am assuming they are working ok then. But, the motion lever switch light does not come on even if the lever is in a drive position. Is this switch bad or is this normal? If I wanted to bypass taht switch also, which two wires do I jump? Thank you Share this post Link to post Share on other sites
KC9KAS 4,741 #2 Posted July 26, 2018 I just picked up a 312-8 and every safety switch wire was disconnected. After I replaced the coil it started and ran fine with no ill effects from the disconnected switch wires! I figured some of the wires needed jumped together, but they didn't! I have a wiring diagram but having a difficult time trying to trouble shoot the switches. Share this post Link to post Share on other sites
953 nut 51,487 #3 Posted July 26, 2018 This PDF has electrical diagrams broken down bu systems for each year and model. Find your tractor and find the ignition system page and it will show only those components, same for starting and other functions. 1 Share this post Link to post Share on other sites
WVHillbilly520H 10,369 #4 Posted July 26, 2018 6 hours ago, KC9KAS said: I just picked up a 312-8 and every safety switch wire was disconnected. I have a wiring diagram but having a difficult time trying to trouble shoot the switches. Sometimes the switch is good but missing the actuator...notice the difference...took me about 3 weeks to figure it out only then because I had another unmolested unit to look at, Jeff. 2 Share this post Link to post Share on other sites
