View Full Version : 89 4L ignition prob

12-10-2008, 10:59 PM
any 4 L experts out there. module under the coil , first one lasted 19 years, now ive gone through 2 in the past 6 months, haynes manual is useless
middle wire on three prong plug (labled "b" on plug) scorched this time
anyone ?

12-15-2008, 05:24 PM
show some pictures of what your wiring looks like. I had to pritty much rewire the whole thing because one problem led to anouther. a fusable link may be messed letting excessive amprage through the coil. take a look at all the fusable links on the starter relay, ive had those melt alot (ignition one fried when i was in kamloops for work.. that was fun)

12-21-2008, 05:20 PM
thank for your post.
did a web search to find some info.
the middle wire on the imc is a - ground
cut a plug and wires of another jeep and spliced it in
hopen it was just a bad connection
time will tell
web info say system prone to ground fault failures ?