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Old 10-17-2014, 04:25 PM   #1
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No brakes?

my sons fw has no brakes when his Ford F-250 built in brake controller is slid to right. How do we check the somewhat corroded plug?thanks for you help...
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Old 10-17-2014, 06:05 PM   #2
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Which plug is corroded, the one on the truck or the one from the 5'er?
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Old 10-17-2014, 06:12 PM   #3
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CRC makes a spray cleaner for electrical contacts. If the corrosion is really bad, try a mixture of baking soda and water, then follow up with CRC Contact Cleaner. Then check out the plug.
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Old 10-17-2014, 06:25 PM   #4
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Stan yeah, the one on the 04 fiver....
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Old 10-17-2014, 06:55 PM   #5
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If you can figure out which wire is the brake wire, then get a sharp point and pierce the wire's rubber coating (when plugged into the truck) and check for voltage. Keep in mind that newer controllers use a pulsing voltage so digital voltmeters aren't fast enough to read the voltage. My GM is that way (not sure about the Fords)...you have to use an analog meter and then will see the needle pulse.
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Old 10-17-2014, 08:07 PM   #6
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Thanks will do that tomorrow...
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Old 10-17-2014, 10:01 PM   #7
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do yourself a favor, DO NOT Peirce the rubber. It is a sure way for that to corrode. Use a multimeter on the terminals themselves, then jump from the battery positive to the brake termals, you will hear a buzz noise in the wheels if there is power there.
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Old 10-18-2014, 08:46 AM   #8
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the factory controlers for the brakes will not work under a specific speed, I think 20 mph.
Also try the trailer with another truck and the truck with another trailer to eliminate the truck or trailer as the problem.
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Old 10-18-2014, 10:59 AM   #9
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the factory controlers for the brakes will not work under a specific speed, I think 20 mph.
Also try the trailer with another truck and the truck with another trailer to eliminate the truck or trailer as the problem.
Earlier Ford built in units would not work up to 5 mph, when the auto lock system hadn't activated. That was changed for the 2006 year and later so this should not be an issue for you.
Also, your blue wire is the designated color specific to your brakes.
Does you controller at the dash show green when applied? If it does, it sees a clear path to the brakes. If it shows red, it could very easily be your 7 pin connection.
Go back to your trailer brakes when the integrated controller is pushed and listen for a hum at the trailer brakes. If so, you have power back that far.
You also have a set of dedicated fuses under the hood for towing. Check these to be sure they're okay too.
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Old 10-18-2014, 11:29 AM   #10
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Until you take care of the "somewhat corroded condition" connecting it to another vehicle is useless. Clean the contacts first. Then troubleshoot. If not, you're wasting your time.
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Old 10-18-2014, 12:34 PM   #11
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Thanks Bob, will pass this info on to my son, he pulls with a 2005 f250 v10 by the way...
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Old 10-21-2014, 08:32 AM   #12
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do yourself a favor, DO NOT Peirce the rubber. It is a sure way for that to corrode. Use a multimeter on the terminals themselves, then jump from the battery positive to the brake termals, you will hear a buzz noise in the wheels if there is power there.
X2! Here is diagram of the connectors. Jump from terminal 2 to terminal 4 to activate the brakes if the trailer's battery is charged.
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Old 10-21-2014, 08:29 PM   #13
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X2! Here is diagram of the connectors. Jump from terminal 2 to terminal 4 to activate the brakes if the trailer's battery is charged.
Helpful post. Thanks!
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Old 10-31-2014, 01:34 PM   #14
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Ok he tried plug on another camper, no brakes. Took truck back to place that just installed FW hitch and plug in and people said must be the brake controller. We didn't touch that! How do we get it checked, go to the dealer?
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Old 10-31-2014, 01:52 PM   #15
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Is it supposed to read 0.0 all the time when not connected.?
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Old 10-31-2014, 01:59 PM   #16
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I mean when connected to camper...
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Old 10-31-2014, 03:23 PM   #17
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When my rig is connected and I slide the lever to the right on the built in controller, I can read a display on the dash what the power level is 0 to about 8 or 9 ( I think). My display will also read "trailer connected". Do you have a display like that?
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Old 10-31-2014, 04:25 PM   #18
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Power level usually goes from 0 to9, but now nothing...since they installed the in bed plug, now neither bed or bumper not working. Ideas on how to check appreciated.
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Old 10-31-2014, 04:31 PM   #19
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It sounds like they installed it wrong or didn't hook something up correctly. If you can't take it to the location that installed it, you might be able to find another hitch installer to have a tester put on it (U-haul?). I know you mentioned in the above post you tried that but.....

The only other thing I can think of is to start tracing wires.
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Old 10-31-2014, 04:44 PM   #20
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Thanks Stan , the installers said not my problem, so maybe u-haul next.
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