Douglas, if it does nothing when you turn the key, and after you check the other items that Art mentioned, check the brake/clutch pedal safety switch that Art mentioned. Here's a photo of the under side of a 104. I have circled the safety switch. Check the wiring to/from this switch and if you have an OHM meter check the switch. Note also the spring steel piece just forward of the switch that is mounted on the clutch rod. Make sure that spring steel piece is intact on your 104 as it must depress the safety switch.