It is interesting that you only hear the buzzing noise when you turn your running lights on. Typically this is a sounds that comes from the brake magnets as you mentioned and shouldn't be an issue, especially if your Prodigy P2 # 90885 and your trailer brakes are functioning normally. You are seeing a little voltage on that brake controller output pin because the P2 sends a pulse charge to sense if a trailer is connected or not.
You may want to do a little poking around with your wiring... view full answer...
The Redarc Tow-Pro Liberty Brake Controller # RED24FR will not always calibrate unless it has a trailer connected. It seems to vary based on the vehicle as not all the trailer systems will work when a trailer is not connected to the 7-way on your 2017 GMC Yukon XL.
Since you tested the controller by pushing the button you know that it does have power going to the unit, and a good ground. Pushing on the brake is what will begin the calibration process when you have a trailer connected.... view full answer...
First thing I'd check is for a blown fuse under you hood. That's the most common issue that kills a trailer wiring circuit and is very easy to fix. Next possibility is corrosion on the pins of the trailer wiring. To fix that take some sandpaper to all of the pins on your 7-way. If the 7-way is looking pretty rough it might be best to replace it with a new one like the # A10-7072VP and you'd have an all new connector. Aside from that you'd have to trace wires to see where the issue might... view full answer...
You may have a blown stop light or CHMSL fuse on your 2011 GMC Yukon. Use the owners manual to locate the fuses. There also may be some connections that need to be made under the hood of the Yukon to make everything fully functional. This is common on GM vehicles, even those with a factory tow package. I have included a link to a help article that explains these connections. view full answer...
There must be a short on the wiring of the trailer you are towing or on the tow vehicle. Sounds like it has to do with the running lights and the 12 volt power circuit. Since it only happens when the trailer is connected I would expect it to be on the trailer side of the situation.
Check out the 7-way wiring diagram I attached and compare that to how the 7-way of the trailer is wired. You would also need to look for obvious signs of a short like cut or exposed wiring or corrosion.
If... view full answer...
After talking to some of my fellow experts, I may have a solution for you. The cause of your issue may be that the connectors have built up corrosion since the last time you have used them and it is causing the power to be blocked or be sent down a different wire.
You will want to check your connectors to ensure they are free of corrosion and moisture. It is also possible that the wiring may not be connected properly or that it may be damaged. You can use a circuit tester such as the #... view full answer...
It sounds like you may just need to adjust the brake assemblies in question on your trailer. To adjust the brake shoes, you will access the brake adjuster from the back of the assembly. You will want to adjust it just until you can no longer turn the trailer wheels by hand, then back off about 10 clicks for the ideal placement.
I have attached a video demonstration for you to check out. At the 4:35 mark in the video, you can watch how the brakes are adjusted.
If this is not the issue,... view full answer...
If all of your wiring looks good and you have solid connections then the problem is most likely your ground. You will want to make sure that the ground on your Stromberg Carlson # JET-5000 has a solid, metal-to-metal, connection to your trailer frame. Any corrosion and sometimes paint can mess with the connection enough that it will make this stuff happen.
If that isn't the problem let me know and I will help you troubleshoot further. view full answer...
The factory trailer wiring harness on your 2002 GMC Yukon XL should already be converted to a combined system even though the vehicle has separate turn signals and brake lights. Whether it has a 4-Way flat or 7-Way connector, the turn signals and brake lights are combined. You can test this with a circuit tester such as # PTW2993 while someone turns on the turn signals and brake lights.
It sounds like there is a problem in the wiring either on the vehicle or trailer. Make sure both the... view full answer...
If the lights at the middle of your trailer are connected to the turn signal circuit then they will go solid when the brake lights are activated since trailers are wired with a two wire system. There really is no easy fix for this problem that I am aware of.
One option is to wire a connector with an extra circuit, if your Yukon has separate yellow turn signals at the rear, I believe most do, you could use a 5-Way connector set like the 5-Way Flat Trailer Wiring Kit, item # HM47890, and... view full answer...
You will want to make sure that the 5-Way portion of the adapter is pinned out to match the 5-Way on the trailer. You will need a circuit tester like # PTW2993. Test the adapter when it is plugged into the 7-Way on your 2008 GMC Yukon to determine which pin is for the running lights. Then make sure the corresponding pin on the trailer side connector matches. If not, you will need to re-pin either the trailer side connector or the adapter to match.
If there is no signal at the adapter,... view full answer...
Sounds like the problem is on the trailer side of the equation based on what you described and how the controller seems to be wired up and working properly.
First thing I would check is corrosion on the trailer connectors. A dirty trailer connector can cause the problem you are experiencing as it would prevent the brake signal from reaching the trailer's brakes. Next you should check the grounds of your brake assemblies. Make sure they are attached to a clean metal surface. Or, preferably... view full answer...
There could be some dirt or dust inside the controller that is causing the problem. The easiest way to fix that is to fully apply the manual override and let it snap back into place. Do this several times to clean the contacts inside.
If you still are having issues, you can test the brake controller to determine if it is faulty. Sever the blue wire several inches from the back of the controller. Then use a circuit tester such as # PTW2993 to test the end of the blue wire coming out of... view full answer...
On your 2010 GMC Yukon there are tow package wires located under the dash to the left of the steering column and held together with a white tag. If those are the wires your husband used then they are the correct ones. But sometimes it is possible to accidently connect a brake controller wire to the wrong tow package wire.
On your Yukon the red/black tow package wire goes to the controller black wire for 12 volt power. The white wire goes to the controller white wire for ground. The Yukon... view full answer...
If you take a look at the owner's manual for the Tekonsha Prodigy P3 Trailer Brake Controller part # 90195 you'll see that the no trailer connected error can be caused by a few different things. I have attached each of these for you below.
1) Trailer not connected to tow vehicle.
2) Trailer connected with open circuit on brake line.
3) Trailer connector disconnected or corroded.
4) Loss of trailer brake magnet ground. view full answer...
Since we know that the trailer brakes do work since they work with your 2011 Ford F-150, the issue must be with the factory brake controllers in the 2013 Silverado and 2014 GMC Yukon XL Denali. The fact that they are GM vehicles is a clue. Sometimes, for whatever reason, GM will not make the tow package fully functional at the factory. You would have to make some connections under the hood.
Even though I have not heard of this being an issue on models with factory installed brake controllers,... view full answer...
It sounds like something is drawing full power on the brake output of your Tekonsha Primus IQ Brake Controller # TK90160. This is most likely the reason why the display is showing 12. According to the User Manual, the power output range is from 0.0 to 13. To determine the cause we'll need to test a few things.
Start by severing the blue wire coming out the back of your Primus IQ, leaving a few inches of wire to reconnect later. Use a circuit tester like # PTW2993 to check for power. The... view full answer...
The error code - - if it is on the bottom means the Prodigy is mounted at too low an angle. If the dashes are at the top, then the Prodigy is mounted to high an angle. This can simply be that it got bumped and needs to be adjusted back to proper position for function. The newer models of the Prodigy controller like P2 # 90885 and P3 # 90195 do not have that mounting specification required. view full answer...
It sounds like you are having trouble with the signals and getting power to your trailer connector on your 2003 GMC Yukon XL. The type of trailer socket that carries reverse light signals is the 7-way type, like # 37185, which is included in our 7-way installation kit # ETBC7.
Since you did not detect signals when you checked your wiring harness plugs, check the main ground wire to ensure it is tightly attached to a clean bare metal spot on the vehicle. A weak ground can cause some lighting... view full answer...
If you have no power on the brake controller output terminal of your 7-way (which is the 5 o'clock pin) then you most likely have a short in your wire or a bad brake controller. I recommend starting your troubleshooting using a circuit tester like # PTW2993 on that pin. If when you hit the manual override on your brake controller, you get no power as you increase the output with the manual override then I recommend next checking directly behind that connector which is normally a blue... view full answer...
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