302 Ford ignition problem.

A buddy of mine has a '91 Ford F-150 with a 302 V8 approx. 100k miles
he emailed me a question that I cannot answer. Here it is:

Hi I have electrical troubles with 150 - no spark, all ignition parts are new, but after rainy day no spark.

All connectors are clean, looks like wiring damaged. Do you have any ideas where I can find incoming and outcoming voltages on ingnition connectors?

I had three different ICMs in this car and problem appeared again, the last module was ok, according to Partsource (auto parts retailer) tester.
My book shows no voltages just connections, doesn't help a lot.

Any ideas or suggestions?

Thank you.

Use a 12 volt test light check for 12 volt to the coil negative. If he has voltage put the test light on the coil negative have somebody crank the engine. If the light doesn't blink he has a bad pickup in the distributor.
http://www.tooltopia.com/ Search THE415 This is the tool needed to replace the pickup. Otherwise buy a rebuilt or junkyard distributor.
Check for a loose ground by computer. Cars were in right kick panel.

Just dandy, thank you.