If you have replaced the clutch and switch, you have to triple check the wiring. One way I do it after physically running my bare fingers over every bit of wire I can. Disconnect the plug at the clutch and the switch and connect one lead of your OHM meter to one of the terminals and the other lead to a good ground. If your meter has an audio alarm continuity position use that or the lowest OHM scale. Now shake the wires hard while watching or listening to the meter. If the alarm sounds or the meter moves, showing continuity, you have a short to ground which is causing your problem. At this point you will have to physically find a frayed wire or break. If nothing changes on your meter, select another terminal and repeat. Do this on both the clutch and switch ends. As with any electrical problem you must go slow and triple check everything. You must never assume something is good until you have checked it more than once. If everything checks out good, you will have to test the switch and clutch to see if you may have gotten a bad one.