lmorris Posted October 21, 2011 Share Posted October 21, 2011 Had a 2006 F350 come in for not shutting off with the key and cluster stays on. Long story short, turned out that the FICM was back feeding power into the cluster and PCM. Quote Link to comment Share on other sites More sharing options...
Brad Clayton Posted October 21, 2011 Share Posted October 21, 2011 Nice find! Quote Link to comment Share on other sites More sharing options...
Keith Browning Posted October 22, 2011 Share Posted October 22, 2011 Yes nice find indeed, but how often does THAT happen? Quote Link to comment Share on other sites More sharing options...
cbriggs Posted October 22, 2011 Share Posted October 22, 2011 Once that I know of! ^^^^^^ Quote Link to comment Share on other sites More sharing options...
lmorris Posted October 24, 2011 Author Share Posted October 24, 2011 We tried to trace the flow to see what curcuits it was back feeding through but started to get a headache, so we gave up. Quote Link to comment Share on other sites More sharing options...
ETS Posted October 26, 2011 Share Posted October 26, 2011 How long did it take you to find it? Not an easy diagnosis! Quote Link to comment Share on other sites More sharing options...
lmorris Posted October 26, 2011 Author Share Posted October 26, 2011 Not easy is right. It was a bit of an accident to tell the truth. Instead of pulling the PCM relay to shut down the truck we pulled the FICM relay, we then noticed that the cluster was working normally again. So we dug into the EVTM to look at the FICM diagrams, thats when the headache started. We swapped out FICM's and it was back to normal. Took a couple of hours. Quote Link to comment Share on other sites More sharing options...
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