Many of these cars don't use a separate starter relay. If yours does, unplug it and use a test light to measure the voltage on the four terminals. One should have 12 volts all the time and one should have 12 volts when you turn the ignition switch to "crank".
For the two remaining terminals, ground the test light clip lead to the POSITIVE battery post, then probe them. The light should light up on both of them indicating a good ground. Look for one of those four wires that doesn't give the correct result.
If your car doesn't use a starter relay, test right on the small terminal on the starter while a helper turns the ignition switch to "crank". If no voltage appears, suspect a problem with the neutral safety switch, (automatic transmission), or clutch switch, (manual transmission). Be sure the switch is not unplugged.
Caradiodoc
Friday, January 29th, 2021 AT 9:31 AM