No crank no start

Tiny
DEVIN HARDEGEN
  • MEMBER
  • 2001 FORD EXPLORER SPORT TRAC
  • 4.0L
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 143,000 MILES
My vehicle won't attempt to start, it doesn't even attempt to turn over. I have power to all my lights and radio. So far I have replaced the battery, the battery terminal connectors, the ignition switch, and the starter. After all those replacements my car is still having the issue.
Tuesday, June 11th, 2019 AT 2:54 PM

1 Reply

Tiny
CARADIODOC
  • MECHANIC
  • 33,871 POSTS
The best suspect is the transmission range sensor. First, try shifting gears a few times, then try cranking the engine in "park', then in "neutral".

Next, look for the starter relay on the inner fender near the battery. Unplug the tan / red wire, then use a test light to check for voltage on that wire's terminal. You should find 12 volts when a helper turns the ignition switch to "crank". If you don't find that, suspect the range sensor.

Here's a link to an article about using a test light, if you need it:

https://www.2carpros.com/articles/how-to-use-a-test-light-circuit-tester

You can use a digital voltmeter too, but for this type of problem, they can easily give false readings that will confuse the diagnosis. The test light can be more accurate.
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Tuesday, June 11th, 2019 AT 3:39 PM

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