No PCM connection - Ford Powerstroke Diesel Forum
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post #1 of 18 Old 12-14-2018, 09:37 AM Thread Starter
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No PCM connection

I finally broke down and had all 8 injectors changed out on the 06 yesterday. Batteries have been crapping out for about a month, so i decided to take truck in with me and change the batts out. So a half mile from the shop it completely shut down. Pulled over and tried to restart. No crank. No dash lights. Checked all fuses. All are good. I went to change it back to stock and i have no connection to OBDI. Any thoughts on what could be an issue?

Edit: Changed both batteries with brand new

Last edited by 05 Pstroker; 12-14-2018 at 11:10 AM.
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post #2 of 18 Old 12-14-2018, 10:46 AM
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I'd start by making sure that they tightened those battery connections.

2004 F550 CC Lariat
BPD oil cooler relocation and upgraded EGR cooler (spooled), BPD oil bypass filtration, aFe Magnum Force CAI, Mishi radiator, 7.3L fan clutch, EC1 ELC, XDP coolant bypass filtration, '08 trans pan/filter, PTP direct clutch solenoid, blue spring, 6.4 starter, MBRP y-pipe, BD boots/clamps, '05 intake elbow, ccv reroute, Torque Pro + OBDLinkô LX, Autometer EGT
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post #3 of 18 Old 12-14-2018, 10:59 AM Thread Starter
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I'd start by making sure that they tightened those battery connections.
Yea I put two brand new batteries on it and they are tight
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post #4 of 18 Old 12-14-2018, 11:11 AM
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Tight doesn't mean good connection.

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post #5 of 18 Old 12-14-2018, 11:14 AM Thread Starter
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Tight doesn't mean good connection.

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They are clean and tight connections
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post #6 of 18 Old 12-14-2018, 11:15 AM
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Okay. If the battery voltage is good/normal, I'd be looking for connection issues or harness short/chafe point that may have been caused or aggravated during the injector swap. Start by making sure that the PCM connectors are undamaged and well-seated.

2004 F550 CC Lariat
BPD oil cooler relocation and upgraded EGR cooler (spooled), BPD oil bypass filtration, aFe Magnum Force CAI, Mishi radiator, 7.3L fan clutch, EC1 ELC, XDP coolant bypass filtration, '08 trans pan/filter, PTP direct clutch solenoid, blue spring, 6.4 starter, MBRP y-pipe, BD boots/clamps, '05 intake elbow, ccv reroute, Torque Pro + OBDLinkô LX, Autometer EGT
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post #7 of 18 Old 12-14-2018, 11:18 AM Thread Starter
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Originally Posted by djmaguire View Post
Okay. If the battery voltage is good/normal, I'd be looking for connection issues or harness short/chafe point that may have been caused or aggravated during the injector swap. Start by making sure that the PCM connectors are undamaged and well-seated.
Did that as far into the engine bay as I could. All look unchaffed and plugged in
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post #8 of 18 Old 12-14-2018, 11:23 AM
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You might try turning on the ignition and then using a wooden stick to molest the harness at various points. If you can bend, twist, or tap something that makes the cluster come to life, there you go.

Does it crank when you use the wire override on the passenger side?

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post #9 of 18 Old 12-14-2018, 11:35 AM Thread Starter
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Does it crank when you use the wire override on the passenger side?[/QUOTE]

Haven't tried that yet
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post #10 of 18 Old 12-14-2018, 11:57 AM Thread Starter
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Well tow truck arrived so I didn't have time to try that. Thanks anyways for trying
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