7 Way Trailer Connector Vehicle Tester

Ask the Experts about this Tow Ready Wiring

• Activating 12 Volt Accessory Circuit of 2002 Ford F-150
  Easiest way to activate the 12 volt accessory circuit of your 7-way will be to run a length of 10 gauge wire like part # 10-1-1 (sold by the foot) through a breaker like part # 9510 from the positive post of your battery to the 1:00 of your F-150's trailer wiring.
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• Troubleshooting Constant Power on Drivers Side Tail Light of Trailer Connector
  It sounds like you have a crossed wire after the fuse panel. Sometimes this happens inside the trailer connector, so I recommend removing your trailer connector and using a circuit tester like # PTW2993 to test each of the wire functions at the US Car Connection locations like you see on this harness # 20147. If this connection works correctly then you will want to replace the 7-way connector on your vehicle because it has an internal issue. If this is the case, I recommend the Hopkins...
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• Activating 12 Volt Charge Circuit of Trailer Wiring on 2001 Ford F-350
  I pulled up the owners manual of your 2001 Ford F-350 Super Duty and the fuse that controls the trailer wiring 12 volt charge circuit is the 24 slot. Try checking that fuse and seeing if that takes care of the problem. Otherwise you'd bypass the factory wiring by running 10 gauge wire like part # 10-1-1 (sold by foot) from the pin on the 7-way to the battery through a breaker like part # 9510 and you'll have eliminated all guesswork and will have the circuit functional. The downside...
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• Could Center Pin of Trailer Wiring 7-Way be 12 Volt Accessory Circuit
  You basically already did verify that the center post of your 7-way is the 12 volt accessory circuit. Normally the center post is the reverse light circuit and the 12 volt pin is the 1:00 pin position. If your center pin is hot all the time then it would be the 12 volt accy circuit.
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• Can a Breakaway Battery and Deep Cycle Battery be Charged off of the Same 12 Volt Line
  What you could do is use the center pin on a 7-Way and instead of having the reverse light circuit on that pin you could remove the wire that is there and run a 10 gauge wire, such as # 10-1-1 sold by the foot, from it up to the truck battery via a 40 amp circuit breaker # PK54540. Then run wire from the center pin on the trailer side to the deep cycle battery to maintain it. This way the batteries each have their own 12 volt source and there is no chance of back feeding. Another option...
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• Troubleshooint no Aux Power on the 7-Way Connector on 2016 Mercedes-Benz GLE350D
  On the 7 Way Trailer Connector Vehicle Tester # TR20117 you asked from the function code for the aux power that is listed on other testers is the BU label for back up or reverse circuit. This will test the center pole of your 7-way that can alternatively be used for an auxiliary power on certain applications. If your vehicle is wired for the AUX as reverse, then you will need to shift the transmission into reverse to check that feature on the tester. If you are having problems with...
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• Tips on Finding the Fuse for 12 Volt Circuit on a 2007 Winnebago Trailer Connector
  The hard way to find a fuse is to trace a wire. This is nearly impossible if the wire disappears into the vehicle where you can't follow it. The manual may not call it something that is obvious. Trailer tow, auxiliary power, or any number of phrases could be used. It could also be located in the cab or under the hood. If the manual is no help most power distribution box lids and panel lids have a legend on them that might be more helpful. If you just cannot find it at all you can bypass...
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• How To Activate 12V Trailer Charge Circuit On 2019 Ford Super Duty With Factory 7-Way
  If you have already added the fuse and the trailer charge circuit is not activated in the 2019 Ford F-350 Super Duty with factory integrated brake controller, then you want to make sure the trailer is connected and you press the brake according to a Ford Service Bulletin on their factory integrated brake control with trailer module 12V charging system. There may also be a dash setting to activate the tow/haul mode on the 7-way before the 12V output is activated.
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• Where is 12 Volt Trailer Wiring Circuit on 2019 Ford F-450
  I pulled up the owners manual of your 2019 Ford F-450 and the fuse slot 27 is the one that carries the 12 volt trailer wiring circuit. Relay slot 37 is the relay related to this circuit too. One option you have would be to bypass the factory wiring and run your own 12 volt circuit straight to the battery. You would need 10 gauge wire like part # 10-1-1 sold by the foot and a breaker like part # 9510. You would just run the wire from the 12 volt pin of the 7-way at the rear of the vehicle...
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• When Should Brake Output Circuit Light on Circuit Tester part # TR20117 Activate
  Brake controllers are designed to only put voltage on the brake output circuit when they are activated by either a brake pedal or the manual override lever of the controller. If your controller wasn't being activated the circuit on the # TR20117 won't show any voltage. Try having a friend apply the manual override of the controller while you watch the tester. You should see the light on the tester come on at that point.
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• How to Activate Trailer Tow Charge Circuit in 2017 Ford F-250
  All 2017 F-Super Duty vehicles equipped with a factory trailer brake controller (TBC) utilize a trailer module (TRM) which initiates the trailer charging system. For trailer charging to operate, the TRM must detect a trailer is connected and a brake pedal input before charging will be present at the trailer connector. Adding the trailer battery charge relay and fuse into the battery junction box are NOT required to operate trailer charging with a TRM. This is covered in Ford document...
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• How to Bypass Smart Tow of 2019 Ford F-150 to Activate 12 Volt Accessory Circuit
  I really wish we had an easy solution, but the smart tow setup of your 2019 Ford F-150 won't allow the 12 volt circuit to be active without an actual trailer connected. That said I do have an option to bypass the factory wiring and give you an active 12 volt power circuit on your 7-way. For that you'd want to run a length of 10 gauge wire like part # 10-1-1 (sold by foot) through a breaker like part # 9510 from the 1:00 pin of your 7-way to the positive battery post in your vehicle and...
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• How To Test 12 Volt Signal On Ford Truck Trailer Connector Without Trailer Connector
  The 7 Way Trailer Connector Vehicle Tester part # TR20117 should work well to test the trailer battery charge line on Ford trucks with the Smart Tow Package because as you mentioned the trailer battery charge line is not active until a trailer is connected and you depress the brake pedal. The 7 Way Trailer Connector Vehicle Tester part # TR20117 would then act as if a trailer was connected. That said, if you are having issues with the trailer battery charge line circuit then make sure you...
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• No Power To The 12 Volt Terminal On The 7-Way Vehicle End Connector
  The 12 volt power lead on the 7-Way will be the terminal that supplies power for trailer interior lights, trailer battery charging. If you are looking at the 7-Way on your vehicle the 12 volt power terminal is the #4 (black) pin located at the 1:00 position. It is normally either a black or red wire. See the picture to the right of a typical 7-Way and it will show the terminal locations and what each function is. I am including a video link on how to wire a 7-Way vehicle end connector. If...
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• Troubleshooting Lack of 12V Power at 7-Way Trailer Connector on 2019 Ford F-150
  Since you are not getting the 12V power when your truck is running, you most likely don't have a fuse issue as you stated their isn't a specified fuse or relay in the owners manual. The issue is that your truck is computerized even at the 7-way. It can sense when a trailer is connected based on the voltage draw so it won't sent a signal for 12V when using some testers, especially LED testers because there isn't enough of a power draw. The system requires a power draw on the 7-way...
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• Troubleshooting No Power to 12V Pin on 2015 Ford F-250 7-Way Connector
  It sounds like you aren't getting any power at the 12V pin on your 2015 Ford F-250's 7-Way connector. I took a look at the online version of the owner's manual for your truck and found that you will want to check the 40 amp cartridge fuse located in the number 10 position inside the power distribution box under the hood. Check to make sure this fuse is present and in good condition. If this is the fuse you already checked or you find that it is also in good condition, then I next recommend...
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• Trailer Fuse Locations on a 2018 Ford F-150
  In the passenger compartment fuse panel the fuse in location 4 is for the trailer brake control. Try checking this on your 2018 Ford F-150 to see if that takes care of your problem. In addition to the fuses in positions 24 and 30 in your engine compartment you can also check locations 43, 53, and 74. I have also attached a link to our fitguide for your pickup in the event that you are needing additional products to tow your trailer.
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• Where Are the Trailer Light Fuses On a 2008 Ford F-350
  The trailer tow fuses/relays for your 2008 Ford F-350 are all located in the power distribution center (PDC) which can be found under the hood, next to your engine. I have attached these locations for you below but for future reference they are listed in your owner's manual. #20 - Relay - Left Stop/Turn Trailer Tow #21 - Relay - Right Stop/Turn Trailer Tow #34 - 25 Amp Fuse - Stop/Turn Trailer Tow Relay #42 - 30 Amp Fuse - Park Lights Trailer Tow Relay #55 - Relay - Park Lights...
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• Comparison of the Tekonsha 7-Way Trailer Emulator # 6562 and the Tow Ready 7 Way Tester TR20117
  Yes, both the Tekonsha 7-Way Trailer Emulator, item # 6562, and the Tow Ready 7 Way Tester, item # TR20117, will test the function of the left turn and stop, right turn and stop, tail/marker lights, 12 volt power, electric brake, and the backup circuit in the 7-Way vehicle side connector. With both testers, the electric brake test will tell you that the circuit is supplying power for the trailer brakes at the plug, but will not check for actual, or correct, voltage. A multi-meter, item...
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• How to Wire 7-Way To Get 12V Power Even with Vehicle Ignition Turned Off
  It sounds like you are wanting to have 12V power at the 7-Way connector on your Ford truck even when the truck's ignition is off. With factory/OEM wiring, the availability of 12V power with the ignition off will actually vary between truck manufacturers. Generally speaking, GMC trucks tend to always have an active/hot 12V pin at the connector even when the truck is off. The 12V circuit on Ford trucks on the other hand usually require the ignition to be on for the wire to have power....
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• 7-Way and Brake Controller Wiring Recommendation for 1999 Ford E-450 Motorhome
  If you have a totally dead 7-way on your vehicle I'd first check all of the fuse boxes of the vehicle for trailer wiring fuses/relays and fix as needed. You can bypass the factory wiring and install a new 7-way but it will require some splicing and wiring. You'd want to first start with a 4-way so that you can get all of the lighting functions. For that you'd want the part # 119190KIT. Then to convert it to a 7-way and wire in a brake controller you'd want the part # ETBC7 as this comes...
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• Solutions for 12 Volt Accessory Circuit Not Active on a Truck
  If you have a GMC or Chevy truck it could be simply that the connections under the hood of the truck just haven't been made. For whatever reason GM does not complete this circuit on all of the trucks with 7-ways so you have to do it manually. I attached a couple help articles that cover this. Aside from that the problem would have to be wiring related or fuse/relay related. One option you have would be to bypass the factory wiring and run your own 12 volt circuit straight to the...
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• Can 7-Way Trailer Connector Vehicle Tester be Used on a 2007 Chevy Silverado
  Yes, you can use 7-Way vehicle side trailer connector tester # TR20117 on any RV style 7-Way trailer connector, also called a 7-Way blade style connector, including the one on your 2007 Chevy Silverado!
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• Troubleshooting Voltage on Brake Controller Output
  If you are not getting voltage at the 12 volt pin on your 2012 Ford F-350 there is likely just a short somewhere along the wiring you need to find; also check out the related fuse for your 12V, which is fuse location 90 in your fuse box. For the brake controller wiring, it sounds like it could be a ground issue if your controller was hardwired in so you are going to want to be absolutely certain your ground is attached to the negative battery terminal on your truck and you'll also want...
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• Location of Fuse for 12-Volt Feed to 7-Way Trailer Connector on 2002 Chevy Yukon
  The fuse you're looking for is located in the fuse box under the hood. It's a 40 amp fuse labeled 'stud 1', I've provided a photo showing where the fuse is located. Once the fuse is replaced, you'll want to locate the short that caused the fuse to blow and repair it, or you'll continue blowing fuses. Check the connector on the trailer and on the vehicle, and make sure they're not damaged or corroded. Repair or replace as needed. Make sure the circuit from the connector on the trailer...
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• Solution for 12 Volt Power Accessory Circuit on 2017 Ford F-250
  The 12 volt power circuit of the 7-ways on the newer Ford trucks like your 2017 Ford F-250 is an odd situation. Many people have the same issue as you or they have found that the gauge wire used for this circuit is just too small to power anything. Best option is to bypass it all with 10 gauge wire like part # 10-1-1 and a circuit breaker like part # 9510 to run from the pin on the 7-way all the way to the positive pin of the truck battery. This will give you a circuit active whenever needed...
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• Fuse Location for Trailer Tow Battery Charge on 2003 Ford F-350
  I looked in the owner's manual of your 2003 Ford F-350 and found that the trailer tow battery charge was in fuse location 115 and it was a 20 amp maxi fuse.
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• Trailer Lights Stay on Once Vehicle Ignition is Shut Off
  I suspect your problem is caused by a damaged or corroded trailer connector. Take a look at your trailer connectors, both the socket on your truck as well as the plug on the trailer. Look for green or white corrosion on the pins or sockets of the connectors. If corrosion is visible, there is a strong possibility that the corrosion has spread to the interior of the connector. The terminals that each individual circuit connects to are very close together, if corrosion builds up on the...
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• Troubleshooting 12 Volt Accessory Circuit Not Active on 2018 Ford F-150
  A lot of times the 12 volt accessory circuit isn't active on vehicles for the trailer wiring. Sometimes it's just a matter of inserting or replacing a fuse under the hood of the vehicle. Or in other times a relay has to be installed. We've found that the easiest way to bypass all of that is to use 10 gauge wire like part # 10-1-1 to run from the vehicle's positive battery post through a breaker like part # 9510 to the 1:00 pin of the 7-way.
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