You can divide the system into four parts, and each one can be tested at the starter relay socket. You can use a test light or a digital voltmeter. Ground the test light or voltmeter, then probe the four terminals in the socket. (Disregard the unused one in the middle). One must have battery voltage all the time. If not, check the wire going back to the battery positive. One must have battery voltage when you turn the ignition switch to "crank". If it does not, check the ignition switch and the terminals in its electrical connector.
Now move your test light or voltmeter ground wire to the battery positive post because we'll be looking for a ground path at the two remaining terminals. You should read battery voltage, (negative, but that's irrelevant), or the test light should be bright on the two remaining terminals. If only one of the two shows a good ground path, put the shifter in "reverse" or "drive". If the voltage goes away, that is the neutral safety switch circuit and it is working. If the voltage stays there, that is the starter solenoid wire and it is good. Troubleshoot the circuit with no continuity to ground.
Monday, May 30th, 2011 AT 12:23 AM