Hi,
Each of the three things can be checked. First, does the security light stay on or flash? If so, turn the key to the run position and allow it to sit for about 10 minutes. If it is an antitheft issue, at that point, the security lamp should turn off, and the engine should start.
Next, at the clutch safety switch, you will see a yellow wire and a purple one. With the key in the start position, power should be present at the yellow wire. When you depress the clutch, power should go to the purple wire and then to the starter. Check that.
If you find there is no power to the yellow wire, then suspect the ignition switch or the ignition 3 fuse is bad, but you checked the fuse. So, you will need to check the red wire with a white tracer at the ignition switch for power.
Try this and let me know what you find,
Take care,
Joe
See pic below.
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Monday, January 2nd, 2023 AT 4:18 PM