Thread: no start urgent
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Old 10-06-2017, 03:43 PM   #19
fdryer
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Join Date: Jan 2006
Location: NYC
Posts: 39,505
 

2003 L-Series 3.0L Sedan
Default Re: no start urgent

Are able to crawl under the engine to measure voltages? The best way to eliminate any doubts about the neutral safety switch is to measure voltage at the starter 'S' terminal, the small terminal on the starter solenoid. This terminal gets 12 volts directly from the ignition switch when its turned to the START position. The START voltage goes thru the park.neutral safety switch before its gets to the 'S' terminal on the starter. This is the start signal to power the solenoid that begins starter operation. If you can locate the safety switch under the clutch pedal swing arm assembly, you can bypass the switch by joining both wires together and see if the starter powers up.

If you choose measure the small terminal on the starter, either disconnect this wire to prevent inadvertent starter operation or clip a temporary long wire extension so you can measure this wire for 12v when the ignition switch is turned to START. 12 volts will on this wire for as long as the ignition switch is held in START position. No 12 volts here means a starting circuit problem. 12 volts on this wire means the starting circuit including the safety switch is fine and the starter is worn out.

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