1995 Dodge Caravan cranks but no start

I haven't looked at your diagnostics yet, but, you may be able to get some codes by cycling your ignition switch. You turn key just till the dash lites come on, no further. Cycle the key on--off, on--off, on, then the mil on the dash starts flashing, you count the flashes to get the codes. Your looking for two digit codes.

Did you check for primary voltage at the ignition coil, engine cranking?

I usually suspect the cam and or crank sensor, but, don't replace anything unless you find something that points in that direction.

Just to add, I looked at your ignition system, no separate cam or crank sensor, but, there is a sensor in your distributor that sends rpm signal to computer. Without that rpm signal, vehicle won't run.

Like I said, try to be sure before you replace anything.

During cranking, the voltage will drop out if computer loses rpm signal. The asd relay supplies voltage to many systems, the computer should the control the asd relay on the ground side. During cranking, no ground for asd relay if no rpm signal.

Did you check for applicable trouble codes? Anything?

Is your dist cap and rotor in good shape? The rotor does turn when you crank the engine? Did you try holding end of coil wire close to engine ground, engine cranking, did a spark jump?

Before replacing that sensor, I'd check the wiring circuit and connector.

Was a jumper wire, dot the eyes on the crank sensor connector, terminal 2 and 3, I gave you the picture, key on. At the same time have a helper hold coil wire close to engine ground. Tap the jumper wire on terminals, make and brake connections. Your trying to induce a spark to jump, If you get a spark, I think the problem is the sensor.

I didn't realize you had an optical sensor, that connector end picture is wrong. My fault.

I'm not sure how to test an optical sensor?

As long as the ref voltage and ground are good. You can use a digital multimeter on the signal wire, slowly turn the crank by hand, the voltage reading should move from 8 volts to zero back to eight volts.

If your digital multimeter has a tach--duty cycle--dwell setting, any of those settings should react to a digital pulse on the signal wire.

Other than that, I don't know what else to tell you?