PowerSToKed Posted November 29, 2016 Share Posted November 29, 2016 Hi everyone. I have a 2013 f250 blowing TCM fuse 46 after it sets overnight. after setting overnight and try to start it blows fuse number 46. Can put in neutral and start replace fuse and all is good can even restart in park without blowing fuse. Sets overnight and blows fuse when trying to start next morning. Have codes p0706, p0707 and p1921. Another tech replaced TCM thinking it was shorting out when cold. did not help. Have unplugged transmission wiring harness and does not blow fuse. Replaced transmission range sensor. Veh worked normally no codes or blown fuses until next morning then same issue. Anyone have this issue? Quote Link to comment Share on other sites More sharing options...
lmorris Posted November 29, 2016 Share Posted November 29, 2016 Our transmission guy has had internal harness shorts on these. Quote Link to comment Share on other sites More sharing options...
8WA Sman Posted November 29, 2016 Share Posted November 29, 2016 Is any of the customer access wires for the TCM being used? Quote Link to comment Share on other sites More sharing options...
PowerSToKed Posted November 29, 2016 Author Share Posted November 29, 2016 no access wires are used and i am replacing internal trans harness now. Quote Link to comment Share on other sites More sharing options...
PowerSToKed Posted November 30, 2016 Author Share Posted November 30, 2016 replaced internal trans harness yesterday and truck started in park and did not blow tcm fuse this morning. drove and restarted several times. after about the 5th time it blew fuse again still not fixed Quote Link to comment Share on other sites More sharing options...
Autoworker Posted February 22, 2017 Share Posted February 22, 2017 had one a while back turned out to be shift solenoid Quote Link to comment Share on other sites More sharing options...
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