This article will show you how to test the starter motor on your 4.0L Ford Explorer (or 4.0L Ranger, or 4.0L Aerostar, or 4.0L Mountaineer) to see if it's the one responsible for your vehicle not cranking.
This is a pretty easy test which only requires a multimeter and a helper to do and you'll find the step-by-step test instructions here.
To see if this starter motor test article covers your specific Ford or Mercury 4.0L equipped pick up, mini-van or SUV, you can take a look at the list of applications on the box labeled ‘Applies To:’ on the column on the right and scroll with the prev and next links.
NOTE: You'll notice that the photos I'm using are of the starter motor off of the vehicle... this is just to make it easier to show you where to make your test connections. You don't need to remove the starter motor from your Ford to follow the test instructions in this tutorial.
Here are the contents of this article at a quick glance:
You can find this tutorial in Spanish here: Cómo Probar el Motor de Arranque (4.0L Ford) (at: autotecnico-online.com).
To succesfully accomplish the tests in this article, I suggest you follow these tips:
TIP 1: Before doing the starter motor test on your 4.0L Ford pick up (or mini-van, SUV), you need to verify the battery's state of charge, since the battery has to be fully charged for any of the tests in this tutorial to work.
TIP 2: The battery cable terminals and the battery posts should be clean and corrosion free before starting the tests.
TIP 3: Read the entire article first so that you can familiarize yourself with the tests.
TIP 4: Since you'll need to raise your Ford pick up (or mini-van or SUV) up in the air to access the starter motor, use jack stands for safety. Do not trust the jack alone to keep you vehicle up in the air while you're underneath it!
TIP 5: Take all necessary safety precautions, like use safety glasses while working underneath the vehicle. Be alert and think safety all of the time.
When the starter motor goes BAD on your Ford Explorer (Ranger, Aerostar, or Mountaineer) you'll see one or several of the following symptoms:
Although the above list is a not a very complete list of symptoms... the theme that runs thru' them, and any other related symptom, is that the engine will not turn over when the key is turned to crank the vehicle.
You don't need expensive test equipment to test the starter motor on your 4.0L Ford Explorer (Ranger, Aerostar, or Mountaineer)... but you do need a few things. These are:
As you can see... you don't need anything expensive. OK, let's turn the page and get starter with the first starter motor test.
“This planet has - or rather had - a problem, which was this: most of the people living
on it were unhappy for pretty much of the time. Many solutions were
suggested for this problem, but most of these were largely concerned
with the movement of small green pieces of paper, which was odd
because on the whole it wasn't the small green
pieces of paper that were unhappy!”
The Hitchhiker's Guide to the Galaxy