08 Superduty with Odd electrical problems - Ford Powerstroke Diesel Forum
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post #1 of 6 Old 04-07-2014, 09:38 AM Thread Starter
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08 Superduty with Odd electrical problems

Codes -
B2a20 - Description unavailable
B2844 Ignition Malfunction

Problem. Truck will start but will not allow the shifter to move from park for 30sec-1min. After that all is well.
Also The other items tied into this are the directionals, power mirrors, locks, information center, and radio. If the truck sits for that 30 secs, I can drive with all power, then within another 30 secs the power for these items shuts off. Driving down the road it seems like it loses power to these items under 1200rpm, then kicks back on if at 1500rpm and above.. Voltage is fine when idling, and It seems to come and go at random.. Then there are other times throughout the day where Everything functions normally for a bit.

I'm not sure if these are related, but I'm leaning towards shift interlock problem of some sort?

1993 f-350 7.3IDI
1967 F-100 352
1958 Pan Head Ground up built NOT BOUGHT
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post #2 of 6 Old 04-07-2014, 10:51 AM
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B2A20 is ignition stuck in start. If that helps. There are multiple diagnostic tests for this problem. Most all center around the steering column, the IC, and the SJB. Check fuse 28.

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post #3 of 6 Old 04-07-2014, 10:56 AM Thread Starter
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diagnostic tests. IC = Ignition control and SJB = smart junction box?

Last edited by kuntryquesttsi; 04-07-2014 at 11:01 AM.
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post #4 of 6 Old 04-07-2014, 11:03 AM
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Sorry IC = instrument cluster, SJB = smart junction box, which is the interior fuse block on the passenger side. Judging by the 2 codes you are getting I would spend more time Investigating the ignition switch it self. For some reason your truck thinks that after it starts, the ignition switch stays in that position instead of dropping into run. If you search around the forum here, I believe I have seen people with similar problems. Have you modified anything prior to this problem?

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post #5 of 6 Old 04-07-2014, 11:12 AM Thread Starter
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Nothing really, it had a remote start and was removed.I'll see what I can find with testing the Ignition switch.
Thanks!

1993 f-350 7.3IDI
1967 F-100 352
1958 Pan Head Ground up built NOT BOUGHT
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post #6 of 6 Old 04-07-2014, 11:24 AM
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No problem! Best of luck to you these electrical problems can be a pain. But definitely check the wires the remote start was connected to. If there are any bare wires shorting to ground, could definitely be your problem.

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