Use the test light with the ignition switch in the run position. Any good ground will do. As you said, stab both sides of the fuseable link.
As part of your testing , you might want to look for 12 volts on the red injector wires. Do this with with the ignition switch in the run position. No 12 volts and you have either a failed EEC relay or blown fuse link.
As part of your testing , you might want to look for 12 volts on the red injector wires. Do this with with the ignition switch in the run position. No 12 volts and you have either a failed EEC relay or blown fuse link.