Need help, Dart won't start...

^^That will work I was uploading and typing. Refer to the switch diagram above, right out of the shop book.

Read J1-12R (no 12 RED) which is the main power to the switch in the "run" position which will put a bit of a load on

Then read IGN1, J2-16DBL, a no. 16 Dark BLue

If both those look good, check where the dark blue goes through the bulkhead connector. Again, look at 8-160/ 161 of the manual