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Old 12-10-2014, 09:22 AM   #1
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Default Backup alarm question

I have a 2011 F-150 EB, it has the backup camera & alarm. I seem to remember when I first got the truck, that the alarm would not sound when a trailer (with working light system) was connected (factory tow/light package). I connected a trailer that had questionable lights & it blew a few fuses, I got that fixed & the trailer light output works again, but the backup alarm alerts now, even when a working trailer/light system is attached. I took it back to the dealership, but they tell me this is how it is supposed to work: alarm sounds in reverse anytime a trailer is connected, regardless of the working lights or not.

With as smart as the computer system is, it would be a simple thing to detect the trailer circuit & turn off the alarm, so I disagree with the dealer - anyone have experience or knowledge on this?? I can't stand the alarm sounding when I am focused on backing a trailer...
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Old 12-10-2014, 09:25 AM   #2
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On my 2010, the backup alarm does disable when a trailer is plugged into the 7 pin. Worst case you can hit the reset button and turn off the back up sensors when hooking to a trailer, then turn it back on later.
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Old 12-10-2014, 09:58 AM   #3
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Quote:
Originally Posted by GIXJ90 View Post
...
I took it back to the dealership, but they tell me this is how it is supposed to work: alarm sounds in reverse anytime a trailer is connected, regardless of the working lights or not.

With as smart as the computer system is, it would be a simple thing to detect the trailer circuit & turn off the alarm, so I disagree with the dealer - anyone have experience or knowledge on this?? I can't stand the alarm sounding when I am focused on backing a trailer...
Doesn't sound when connected to my trailer in reverse.

Find another dealer?

Maybe first check another trailer to be sure it isn't something still funny with yours?
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Old 12-10-2014, 10:23 AM   #4
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If you have a fuse blown, the truck won't know the trailer is connected and so still set the alarm off.
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Old 12-10-2014, 10:29 AM   #5
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I bet there is one more blown fuse.
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Old 12-11-2014, 02:10 PM   #6
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My backup sensor goes off even if my trailer is plugged in. I plug it into the 4pin though.
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Old 12-11-2014, 06:04 PM   #7
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Default Follow up

Thanks for the feedback - my primary question was RE whether the alarm goes off when the 7 pin connector is used, thanks. I have convinced the dealer that it is supposed to turn off, they have asked me to bring them my trailer if needed...

On another note: where in the world is this "alarm reset button" or whatever it is called?? I have never seen such...
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Old 12-11-2014, 06:30 PM   #8
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mine doesn't sound with my car hauler... it did when I had bad wiring to the brakes on the trailer....
so to me it may look for the trailer brake feed- low voltage signal??..
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Old 12-12-2014, 08:45 AM   #9
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Quote:
Originally Posted by GIXJ90 View Post
On another note: where in the world is this "alarm reset button" or whatever it is called?? I have never seen such...

See attached extract from the owners manual. Not alarm reset, but just reset buttom, has several uses.
Attached Thumbnails
Backup alarm question-2011-owners-guide11f12og1e_page_1.jpg   Backup alarm question-2011-owners-guide11f12og1e_page_2.jpg  
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