2010 Ford F-150 DRIVERS SIDE RUNNING BOARD

MTRDUDES

MEMBER
2010 FORD F-150
4.9L
V6
2WD
AUTOMATIC
135,000 MILES

This is a customer's vehicle; for most of this past year he's been having issues with the drivers side running board. It will extend out going down the road and stay that way for no reason then arbitrarily retract back. It sometimes comes out when the door is opened and other times not. It will work sometimes like it's supposed to and other times won't work at all, there is no continuity to the problem. I haven't checked it yet because I have no manual or schematics regarding the electrical system and don't want to disassemble something I may have trouble reassembling. I take care of his truck fleet and he's adamant about wanting me to repair it, he refuses to take it to the dealer or other independent shops. Can you supply me with a starting point, any information you may have about this type of problem; I've spent two days reading all the tech blogs and it all starts morphing together into one big mess. Schematics, if you have them, would be a great help, thanks.

4 Replies

HMAC300

MECHANIC
48,601 POSTS

If you n have a scanner to scan this then you are working blind as you have to see what code is coming up and if it's staying beyond 4 seconds it should set a code. I'm sending a pic on how to test it, but it could be a power running board module. It has hall effect sensors in the module I've sent the best I can do with wiring diagram it is in several pieces you really need a scanner to fix this or diagnose it correctly however. Also look for poor connections at running board.

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Tuesday, December 2nd, 2014 AT 12:14 PM

MTRDUDES

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36 POSTS

Will see the truck Friday and check it then, thanks for the help

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Tuesday, December 2nd, 2014 AT 12:54 PM

MTRDUDES

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03/10 FORD F150 HARLEY DAVIDSON CREW CAB - 5.4L / ENG. TYPE 3V - VIN #1FTEW1CV1AFB95607

Update from when we last spoke, the info below is accurate, I didn't have all the correct info when I first wrote. The issue is the drivers side retractable running board, the passenger side works fine. The D/S running board has been acting up most of this year, this is what it does/is doing;
1. When the truck is off and the doors are closed the step is extended
2. When the truck is running, doors closed and not moving the step is extended
3. When the truck is running and moving forward the step retracts.
4. When the truck is running and comes to a stop such as a sign the
step extends
5. When the truck is then moved forward from a stop the step retracts
until the next time it stops, then it extends again

There were no trouble/DTC codes in the vehicle computer but there were two faults listed below. I don't know if the ACM message is tied in to the running boards or not. Couldn't find any info on the board manufacturer or any kind of model/identifying number.
1. ACM / audio control module (CMDTCs) - "left rear door ajar" message
staying on dash display; door is always closed, never ajar.
2. HVAC / #'s B1082 / B1082:00-0A codes / right temperature damper
motor) Right / passenger side vents not working but haven't checked it
out further yet.

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Monday, December 8th, 2014 AT 4:01 AM

HMAC300

MECHANIC
48,601 POSTS

As long as the door ajar is on then the board will probably stay out because it makes it think that the door is open and the board needs to be out. I hope you used a pro style scanner and not one from an auto parts as they will not read any code except engine /trans codes. You need the ones like snap on or that tool company sells for a couple thousand dollars. Check right kick panel for a bad ground for door ajar thing I think that may be your problem I'm sending test stuff for lh prb hope you can read it as I can't make it any larger.

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