Ford does NOT have Bronco base non trailer tow package brake controller 30 amp switch one aux swtch?

frankgoss
Feb 17, 2023

Rank V

Feb 17, 2023

After spending several hours with FORD accessory parts on a new Bronco brake control for $336 , it fits only 7 pin tow trailing Broncos. No Base or Limited Editions.

The $125 4 flat wire Ford Bronco Trailer wiring kit , has no brake control circuit. However, etrailer is shipping 22' of blue 10 ga brake control wire. When a Ford dealer install the 4 flat wire trailer harness, a 12 ga red hot line is going directly to the battery. We requested the blue 10 ga wire be picked up by steering wheel and run together, from steering wheel to 4 flat wire into a 4/7 Hopkins female trailer outlet. The blue wire will terminate on the blue pin of the Hopkins, mounted on bumper.

Ford's brake controller is plug/play, if you have the factory $595 tow pac. However, etraiker states that any non Ford brake controller can be wired with a universal wiring $100 kit, with 30amp relay , that is to supply power to the brake controller ( black wire) red goes to brakes, and white is ground.

Well the Auxiliary switches has a switch one 30amps. and it comes out by the firewall. So if Ford put the correct wires (10ga) wired to that switch relay, why not use it to power your trailers brake $60 controller.

The blue 10ga wire that etrailer is sending will hold 30 amps dc. once wired, switch one can control the trailer brakes. If those trailer brakes fail for any reason, like start smoking, all you have to do is flip switch, dont have to pull over to cool down. The controller will regulate electric brake pressure.

Keep in mind we only can tow 3500 #, hitch tongue 350# net say 3150# not much.

I am still playing with switch 6 10 amp for trailer tail lights, to avoid taking left interior apart and breaking clips.

Advantages are boat ramps. Electric surge brakes. The surge controls can get water at tongue of trailer. My tide runs 8 feet and ramps sometime steep. Why not cut 30 amp at tongue!

Any comments. I like to keep electric away from water. Here is a PICTURE of universal brake control $60.
Last edited by a moderator: Feb 17, 2023

Rank V

Feb 17, 2023

#1
Trade in the Bronco, buy an F150 with the trailer brake controller already built in..that way you won't have to worry about it and will save you so much time in not having to post the same thing for months.
22 BB 4dr SAS 2.7 Mid Pkg Hot Pepper Red, Delivered 8/25
Previous 2019 F150 Ruby Red SCrew 3.5 Eco, XLT Sport/FX4 302A
MESTUNTMAN

Rank V

Feb 17, 2023

#2
eTrailer has a Curt controller that plugs into the 7 wire plug in the back of the truck. You load an app. on your phone. If you are towing the same trailer you never have to change the setting again. I think it's about $258 range. It can be used on other vehicles and trailers as well.
Moderator

Life is a Highway

Feb 17, 2023

#3
Maybe one thread?
MESTUNTMAN, SAVEUP

Rank V

Feb 17, 2023

#4
Call Ford on Auxiliary switch #1 30amp to check with dealer if wire coming from relay to engine bay can hold a 25 amp load for the etralier $60 black power wire. Other post was running blue brake control wire from 7 way female. Only red, than goes to brake harness and white ground has to be connected in non factory Bronco tow pac.

Reason is ramping boats in high tidal waters. Switch #1 can disconnect brake controller, and maybe switch 2-3 can disconnect trailer lights if not need. Any feedback , I see no law that requires you to have brake control enabled , when you are not towing a trailer, boat, or utility trailer!

Rank V

Feb 17, 2023

#5
10-gauge wire will transmit 30 amps. However, 10AWG can also handle 40 amps for a short period.

Attachments

Team Jeff!!

Feb 17, 2023

#6
Maybe one thread?

OH Look another thread on the same topic, shocker there!! LMAO attention grab
WT HOSS 4dr 2.7 MIC Lux Tow
7/16/20 Res -- 1/22/21, 10/8/21 Order -- 3/24/22 VIN -- 5/9/22, 5/23/22, 5/16/22, 6/6/22, 6/17/22 Build 7/15/22 Delivered
TK1215, Ditchrunner

Rank V

Feb 17, 2023

#7
Hi Genius

Got any answer? or what are you communicating?

FORD APPEARS TO HAVE A GLITCH. 7 DEALERS WILL NOT TOUCH ELECTRICAL DISTRIBUTION AND MODULES.Still unresolved since 9/12/22 ro!

HERE IS POSITIVE PROOF THAT THE AUXILLIARY? SWITCH ONE 30 AMPS CONTAINS THE WRONG 1.5MM ( THAT LIKE 1/20 OF AN INCH IN DIAMETER JUST READ THE BELOW CHART! 30AMP SWITCH MUST BE AT LEAST 2.5MM OR 10AWG! READ READ !

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Ditchrunner, ResidualGenius

Rank V

Feb 17, 2023

#8
Just called Ford access. $336 for factory tow 7 pin brake controller is 30 Amps and fed by yellow 10AWG same as blue going to factory wired 7 pin.

Therefore Ford's auxiliary switch one from relay to firewall circuit must be 10AWG not 1.5mm. Here is pic of $336 look a four bare wires blue same as yellow per Ford.

Ford OEM $195 AUXILIARY SWITCH ONE IS DEFECTIVE. 1.5MM wire will not, repeat will not handle a load of 30 amps. We have been scammed by Ford!

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Rank V

Feb 17, 2023

#9
WIRE GAUGE CHART BY LENGTH AND AMPS
5 AMPS 10 AMPS 15 AMPS 20 AMPS 25 AMPS 30 AMPS 40 AMPS 50 AMPS 60 AMPS 80 AMPS 100 AMPS
Wiring Length

0 - 5 feet 16-gauge wire 16-gauge wire 14-gauge wire 14-gauge wire 12-gauge wire 10-gauge wire 8-gauge wire 6-gauge wire 6-gauge wire 4-gauge wire 4-gauge wire
5-7 feet 16-gauge wire 16-gauge wire 14-gauge wire 14-gauge wire 12-gauge wire 10-gauge wire 8-gauge wire 6-gauge wire 6-gauge wire 4-gauge wire 4-gauge wire
That could lead to a dangerous situation. Only buy quality wire.

This is even more important when it comes to signal wires. While these wires are often 18 ga or smaller, the quality of the wire is even more important, any additional resistance in the wire will degrade the signal and your car will suffer. There are many cheap wiring spools and kits available that use CCA instead of OFC, so it is a good idea to ask before you purchase the wire. Stick with OFC and you will be good to go.

Conclusion,: Top row is Amps ,30 other rows are length and AWG -30Amp must use 10 AWG colors are not same as household but must labeled.

Here is a pic of small wires that will not hold ,30 amps. Suggestion replace fuse to 15 amp fuse to avoid a fire! Is your circuit ( under power when switch up-hot) on a 10 AWG wire? or a small 16 like pic shows.

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Team Jeff!!

Feb 17, 2023

#10
Hi Genius

Got any answer? or what are you communicating?
It was already answered in your identical post before so no need to repeat it here.
Not sure why you keep repeating yourself numerous times
WT HOSS 4dr 2.7 MIC Lux Tow
7/16/20 Res -- 1/22/21, 10/8/21 Order -- 3/24/22 VIN -- 5/9/22, 5/23/22, 5/16/22, 6/6/22, 6/17/22 Build 7/15/22 Delivered
Ditchrunner

Rank V

Feb 17, 2023

#11
@Laura
See your Bronco Nation video on installing accessories on 6 Auxiliary switches. Its wrong!

Your gentleman uses a blue connector in his video for hooking up Switch #1 30 amp. He says use solid yellow wire from distribution box and then crimps with blue connector.

However, it is a blue plastic butt type connector because switch #1 yellow wire is 1.5mm or 16 AWG. Amp rated at 13 amps(156w) vs a the fuse #60 in distribution box and in chart above. A 30 amp fuse will not trip until the wire load is 30 amps.Therefore that yellow 1.5mm will be overload more than twice the caring amp, will melt or short , spark or even cause a fire. He says base Bronco ,with factory 6 aux.switch option.

Here is your link.https://www.bing.com
2021 Ford Bronco Auxiliary Switches | Bronco How-to Ep. 8 | Bronco Nation
139.2K views · Mar 6, 2021SaveYouTubeThe Bronco Nation

Here is proof blue connector is rated for:
Cleaner Solderless Connector (Blue) 14-16 Guage Wire # C67302

If it was truly 10AWG wire from distribution box , he would have to use a yellow connector, since wires is say 2.5mm.

After many calls, Ford Customer Cares stated they only take complaints to document issues, they dont resolve any of these millions of complaints.

The dealer, if he knows what he is doing , will pull the fuse #60 - 30Amp and replace it with a 15 Amp fuse and the customer will not be the wiser.(Service bulletin to be issued?)

Please speak to your contacts at FORD.

Why? Worst case switch one 30 amp is ultimately connected to white yellow at E point.They leave ignition in on, but not run! Their children sleeping in tent on top off road and they are still up by say camp fire , maybe with some beers. The oversized ref/ freezer or say 1000 watt inverter (1000w/12v= 80 amps) starts drawing current to run 120V appliance. That thin 1.5 mm will start overheating that white/yellow wire and may be a hazard to those children in tent top miles off road. NEC codes have been violated by Ford. Please help.

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Rank V

Feb 17, 2023

#12
@Laura

Here is some posts from 6G on #1-30Amp fused to 1.5mm:
1."to make aux 1 more complicated, not only do most lights not need 30 amps, but the wire itself seems to be 1.5mm2 thick, which at most should only push 15-20 amps..(13Amp) maybe it was designed for a fridge or something with spike wattage?"
2 ."I've already used AUX Switch 1 (30 amps). I want another 30 amp switch. The wire size for Switch 2 is the same as that for Switch 1 (1.5 mm). Anyone see an issue with replacing the 15 amp fuse with a 30 amp? Thanks."
3."There’s more to the amp rating than just wire size. Fairly safe to say the answer is no."
4."So the relays for the aux switches are in a solid junction box unit under the hood. If one of those blows you'll need to replace the entire relay junction box as it is non-servicable. I know because I had a bad aux6, who's relay was shot and a new junction box was installed. I do not know if the relays are sized the same or different, the diagrams I've seen only show the input side amperage not the relay's abilities. That is the caution point here."
5."Yeah you need to know what the gauge of the wire is and what the relay is rated for. If you swap out the fuse for a 30 amp but the relay is only rated for 15 amps, you're going to have a crispy relay on your hands. The relay itself is in the battery junction box, and according to the service manual it is not serviceable.Which probably means you're going to have to go with @Silver-Bolt's approach of triggering a higher-amperage relay with a relay."

And the list goes on. Ford 1.5mm is only rated for 13amps @ 5 feet go 15 feet and maybe 5 amps, but wire will heat up. Relay may trip to late on point E in above diagram.

Please use your contacts to clarify. Always can put lower rated fuses but not higher.See pic below of circuits.

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Rank V

Feb 17, 2023

#13
@Laura

Well another hour with Ford Parts on the above Battery Junction Box. Well its 22-24 separate pieces . Here is some:

MB3Z-14A068-Z $ 378.33 - MU5Z-14526-F $156.00 fuse MB3Z-14A245-AA relays $72.17; 20 more parts costs circuit breakers,etc approximately $700.00 plus Cover and tray Say total if blown $ 1,300.00 WOW said the Ford parts gal!

See above NON SERVACEABLE- Also went under hood that yellow wire is as stated in above chart and is 1.5mm. (16AWG load 13 Amps)

The auxiliary switch is what you paid for to hook up cheap LED lights. Put a 100,000 candle light on any of non- circuit five wires per above diagram and good by $1300.

The 12v power in right rear has heavier gauge and on 20 amp fuse. Ford got cheap on the auxiliary switches. Some my just used to wire in as a relay for higher wattage devices like winches. But still have to hardwire heavier gauge wires like 10-8-6 directky to battery!

End of blog!

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