Note On Intermittents
WARNING: This page is about a different car, the 1990 Cadillac Seville and 1990 Cadillac Eldorado. However, it is still accessible from the selected car via links, so may be relevant.
Probe fuel pump test point with a voltmeter to ground. Turn key on and observe voltmeter. Voltmeter reading should be battery voltage for 2 seconds and then drop to zero. If voltmeter stays at battery voltage for longer than 2 seconds, check fuel pump relay contacts for sticking. Repeat test several times. Continue probing fuel pump test point to ground. Start engine and then turn it off. Voltage should drop immediately to zero. If not, check oil pressure switch contacts.