1997 Dodge Ram 1500 5.2 liter won't start

I had a problem with my 1997 Dodge it would start no problem and then the next time you went to start it it would not give fire the fuel pump was working but no spark.This trouble was very intermittent and frustrating to track down.I ended up cleaning the battery connections especially the negative connections I then measured with my ohmmeter the resistance of the black wire running from the fuse/breaker the hood after the alternator fuse running to the alternator.This connection measured >than 1 meg I then cleaned this connection inside the box and at alternator end and it then measured approx 5 ohms.The truck has now not missed a beat for over two weeks and is running great.This is after I had already replaced a computer,coil,plugs,rotor,distributor cap and pickup coil. I had a problem with my 1997 Dodge it would start no problem and then the next time you went to start it it would not give fire the fuel pump was working but no spark.This trouble was very intermittent and frustrating to track down.I ended up cleaning the battery connections especially the negative connections I then measured with my ohmmeter the resistance of the black wire running from the fuse/breaker the hood after the alternator fuse running to the alternator.This connection measured >than 1 meg I then cleaned this connection inside the box and at alternator end and it then measured approx 5 ohms.The truck has now not missed a beat for over two weeks and is running great.This is after I had already replaced a computer,coil,plugs,rotor,distributor cap and pickup coil.

What does the "brain" look like? The auto parts store gave me an ignition control module to try, but I could not find it anywhere in the engine compartment. What does the "brain" look like? The auto parts store gave me an ignition control module to try, but I could not find it anywhere in the engine compartment.