PCM Will Not Power Down

Smack the top of the dash over the cluster and see if that works. The retained accessory power is in the cluster I think. If that’s no help. Swap the pcm power relay with a similar one

I did disconnect cluster with no change, also swapped pcm power relay no change i believe fuse 34 pulled eliminates that also.

You might try also removing the always powered fuses, F5,F29,F30 to see if you can get it to fully power down. Most of the newer Fords will not sleep without seeing Park signal but I think this is a little old for that function.

Chris, F5, F29, F30 are hot all the time correct? The park signal I will go check. There was 2 pids one indicated Park the other stated Neutral I believe. I did disconnect the cluster with no change

I just got done with an 06 Ford that had this kind of issue. The pcm sees park from the range switch on the trans. But the cluster might be looking at the physical shift lever for a park signal. Look at pcm indicated gear and ipc gear. Just my 2 cents

hi chris, i think me spoke today on the phone...Someone from Opus called me anyway, and sure enough i needed to bounce a question off of someone 5 minutes later..

Hi Ken, If you thought that the PCM would not go to sleep because of something on the network then disconnect the PCM and do a parasitic draw test. If there's a draw then do your normal testing to see what's not sleeping and sending data on the network. If there's no draw then you can focus on inputs to the PCM. Good luck, Mike

Check for water intrusion in PCM connectors and inside PCM. IC and ABS are on the same network as PCM so disconnect those to see if PCM stops staying awake.

Check the relays and the diodes in the relay and fuse boxes. If my memory serves me correctly there is a relay/diode that fails causing this issue. Possibly someone replaced a diode with a fuse.

Check the AC Clutch Relay which is possibly back feeding 12V to F32 and PCM Power Relay.

I ran into this same issue on a similar F150. I can’t remember all the details but in my case there was one fuse that remained powered in the junction block in the right kick panel. It was related to the PCM power relay circuit. While the fuse didn’t show full battery voltage after vehicle shutdown it did flow enough current to allow the PCM relay to remain energized. The root cause was current…

Ken Rocha Try to remove fuses one by one and trace that wire where all connected​.​Few circuits may oparate from same power so check it carefully. I have solved few problems like that but not in the fords​.​If the PCM is not allowing to power down disconnect the PCM and see what happens.I guess the someone may wires up for a accessory relay that might cause the problem.