89 XJ no spark

[4runnerfromhell]

kind of a long story but here goes my son has an 89 XJ that I cant get to run(no spark) I/he bought another one for spare parts that ran he drove it in the garage and I took the spark plug that I was using to check for spark on the one that doesn't run and put it in the coil wire on the one that did run to make sure it was good and now the one that was running 2 min ago now has no spark and will not start and yes I tried a nother plug to make sure so now I am sitting her with my Yota rockcrawler outside in the cold and two non running jeeps in the garage any help would be appreicated

Jim

[jackrista]

did you ground the plug when testing for spark????? if not you my have overloaded the system; check the control module?

[4runnerfromhell]

thought I did but is fried the crank position sensor git it fixed and it is running again but jeep # 1 still has no spark