Chrysler Repair: 1998 Dodge Caravan no start, dodge caravan, position sensors

Question
This vehicle will not start at all now, but previously it was an intermittant condition. Sometimes the lights will flash and the horn will beep (as in anti-theft). Maybe an anti-theft problem or the ECM: where is the anti-theft module located and is there a way to test the ECM?

Answer
Hi Larry,
The ECM has a memory that stores fault codes that will tell you if something is wrong with the ECM or many other parts. It may be possible to get a readout with the ignition key: "On-off-on-off-on and leave on" doing that in 5 seconds or less. Then watch the odometer window see if any 4-digit code numbers appear in place of the mileage reading; or watch the check engine light to begin to flash, pause, flash, etc. Count the number of flashes before each pause. Then repeat to get an accurate count. Combine the numbers in pairs in the order of appearance to form 2-digit fault codes. Then go to www.allpar.com/fix/codes.html for a code listing. If neither of those responses happen then a fault code reader will have to be plugged in to a socket under the dash next to the steering column.
I suspect that one of the two engine position sensors (cam or crankshaft) is faulty as they usually begin to fail intermittently and then permanently. So if you can't get a readout those would be the first parts to buy and install. You have to put the sensor in so that the paper spacer on the tip touches the metal surface inside the engine, then tighten the retaining bolt to maintain that position.
Let me know which engine you have for specifics.
The anti-theft module is part of a larger unit called the body computer and can't be disconnected practically. The best way to avoid it is to only secure the doors by means of the hand-operated push-buttons when you leave it. Never use the power locks, door key, or remote to lock it.
Roland