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Crank position sensor test...
With engine off, A+B should equal 200 +/- 75 ohms
with hot engine. also when measuring voltage, volts should spike when engine
is cranked or is running. If no reading, CPS is bad. Oops, disconnect sensor
when doing ohm test...
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 how to replace CPS 

The crank position sensor on the 4.0L sits on the bellhousing of the 
transmission on the driver's side.  The connector attaches to the wiring
harness at the back of the valve cover, intake manifold side.  

I found the best way of removing it is from underneath.   I used a 
stubby 3/8" ratchet with two 9" wobbly extensions and one 6" wobbly
with an 11 mm 6-point socket, normal height, attached.

Unfortunately, I did not do the above test BEFORE I did the replacement.

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Neutral Safety Switch Bypass Instructions:

In the relay/fuse box under the hood, there is a starter relay with 5
pins. 3 smaller and 2 bigger pins. After pulling the relay out of the
socket, insert the 2 ends of a small jumper wire into the 2 larger slots
of the relay socket. That puts juice to the starter, even if the key
switch is off. Of course the key must be in the on position for the
engine to start.