How to Test 7-Way of Vehicle to Determine if 12 volt Circuit is Active

Question

Question:

would the trailer battery pin in my factory 7-pin glk250 2014 be connected, and if so what amp fuse would be installed?

asked by: John B

0

Expert Reply:

Most likely the 12 volt accessory circuit of your 2014 Mercedes GLK250 would be active on your vehicle. You can test this with a circuit tester like part # PTW2993. To determine the amperage rating of the circuit you will need to find the fuse connected to this circuit in the fuse box of your vehicle.

The 12 volt pin will be the one in the 2:00 position.

expert reply by: Jameson C

0

Answer 1

The Tekonsha Prodigy RF Wireless Trailer Brake Controller w/ Bluetooth item #TK94FR has to be securely mounted to your trailers coupler with screws. The Prodigy RF connects to your vehicles 7-way so there aren't really any alternatives to…

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Answer 2

Yes, the Tekonsha Prodigy RF Wireless Trailer Brake Controller #TK94FR only needs power from the battery charge line, ground and stop/turn signals to function. The power is what gives the controller its power and it watches for power going to both…

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Answer 3

Thank you for the photo of your trailer's tongue area. The Prodigy RF Brake Controller #TK94FR can be mounted in any of several points on a typical a-frame trailer. The diagram I linked shows you the preferred location on the outside of the…

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Answer 4

You should only have to pair the RF #TK94FR once and then it will be good to go after that. The only time when you may have to pair it again is if you do not tow the trailer for many months in a row. Or if you change tow vehicles. Otherwise it stays…

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Answer 5

Yes, for the Prodigy RF Brake Controller part #TK94FR that you referenced the only circuit you will need to be active for the controller to function is the taillight circuits and the 12 volt accessory circuit. I attached an install video for this…

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Answer 6

According to the owner's manual for the Tekonsha Prodigy RF Wireless Trailer Brake Controller part #TK94FR, "The Prodigy RF may operate with reduced performance if the Remote Hand Held Unit is removed or disconnected while the trailer is in…

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Answer 7

According to the owner's manual for the Tekonsha Prodigy RF Wireless Trailer Brake Controller part #TK94FR, "The Prodigy RF may operate with reduced performance if the Remote Hand Held Unit is removed or disconnected while the trailer is in…

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Answer 8

Typically the galvanic corrosion between steel bolts and aluminum isn't bad enough to be an issue. The best solution though would be to swap the hardware that comes with the RF part #TK94FR with stainless steel hardware and you'd be even…

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Answer 9

If you look at the linked instructions for the Prodigy RF #TK94FR you will see that there is nothing prohibiting installation perpendicular to the tongue. But ideally it would be parallel with the frame and level + or - 5 degrees.

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Answer 10

I spoke to Tekonsha about their Prodigy RF Wireless Trailer Brake Controller w/ Bluetooth #TK94FR and they explained in detail how the controller interprets the brake signal. It is looking at the power input from both the turn signal/brake light…

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Answer 11

The OL (overload) error message on Tekonsha brake controllers like #TK94FR tends to suggest that there is a problem in your trailer's brake circuit wiring. You can start by inspecting both the vehicle and trailer connectors for any signs of…

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Answer 12

As long as the 12 volt accessory circuit is active on the 7-way of your 2015 Jeep Cherokee (1:00 pin) and the turn signal circuits are also working then the Prodigy RF part #TK94FR would work well for you. If you needed to complete the circuit all…

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How to Test 7-Way of Vehicle to Determine if 12 volt Circuit is Active

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