someone just did a engine swap on this intreped(typical) the positive battery cable was shorting out on the enging block, i repaired the cable, charged up the batt, i tried to start, it spun, and fired rite up, ran for 3-5 seconds, then died, then it restarted, died again 3-5 seconds, now when i turn the key to start there is nothing, no clicks, nothing, starter is good, i can manually power it to spin the engine, i checked every fuse i could find, checked all ground cables, looking for possibly fuse links?? maybe the ecm is fried?? thanks for any help,,