2012 Ford F-150 with Factory Came with Fuse and Relay Labeled AL3T-15A416-AA

Updated 08/19/2020 | Published 02/02/2012

Products Featured in This Question

Ford Replacement OEM Tow Package Wiring Harness, 7-Way

(291)

$88.71

Hook Probe Circuit Tester

(65)

$13.35

Question:

Just got a 2012 F150 with OEM tow pkg. Found a package with a fuse and relay in the door pocket with AL3T-15A416-AA label. Was told it was for the tow pkg but dont know if I should install them or not??

asked by: Bill

Expert Reply:

Normally, a factory tow package will be fully functional from the factory when you buy the truck. But in some cases, a tow package can be added very easily (by plugging in a 7-Way and adding some relays/fuses) that they can provide the parts at the dealer. It sounds like your truck may fall under the second category.

To be sure, all you have to do is use the owner's manual to find the proper locations of the fuses/relays related to the tow package, and insert the ones you found (if needed, they may be spares). You can then test your trailer connector with a circuit tester like # PTW2993 if needed to make sure all of the functions work.

expert reply by: Michael H

John D.

12/3/2012

the relay and fuse are for the Max Tow package. relay goes in slot 9 fuse goes in slot 21 of the fuse box located in the front of the engine compartment. this supplies power to the trailers electric over hydraulic braking system and causes the manual control on the dash to come alive.. it was painful to get this information out of Ford and came from another owner.

Patrick B.

12/3/2012

Thanks for the information, we will hold onto it to help future Ford truck owners. Thanks again!

Tony V.

8/19/2020

@JohnD you are the man!

Wayne J.

4/23/2013

I added these to my 2011 ford f150 limited and still no power to the 4 prong plug in.any suggestions?thanks

Patrick B.

4/25/2013

Break out the owners manual and check all the fuse blocks and power distribution blocks to make sure any towing relay or fuse is present. A truck like yours will typically have at least one power block under the hood and a fuse panel inside the cab. There may be more than one block or panel under the hood. If you purchased the 118242 kit, it is not compatible with a 2011 F-150.