Primus Brake Controller ER Error Code Troubleshooting

Question

Question:

My older Primus brake controller is displaying error code 7 trailer not connected, but I cant find any information as to what this means. If there is a wiring fault somewhere, Id appreciate any guidance you might be able to give as to where to look. It is an older unit, so it may just be worn out. Thanks

asked by: Kent D

0

Expert Reply:

The ER would mean there is an internal error on the inside of the brake controller that cannot be fixed. I believe that is the code you are experiencing. The brake controller will have to be replaced. The P2 # 90885 will use the same plug as the Primus so it is a great option for a replacement. It uses the latest generation of inertia sensor and is much more reliable.

expert reply by: Jameson C

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Answer 1

A 4-Way trailer connector has the basic lighting functions only; running lights, left turn signal and brake lights, right turn signal and brake lights, and ground. A 7-Way has these functions and a 12 volt circuit, a circuit for electric trailer…

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Answer 2

The difference between the Class II and Class III hitches has to do with their Gross Trailer Weight (GTW), their Tongue Weight (TW), and their Hitch Receiver Size. Class II trailer hitch receivers have a 1-1/4 inch receiver and can be rated up to…

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Answer 3

If you just need a 4-pin to 7-pin trailer wiring adapter, then you can use part #C57672. This will plug into the 4-pin trailer connector on your brother's vehicle and give him the 7-pin socket for the trailer. Keep in mind, this will only give…

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Answer 4

You do have the option to utilize the air brakes on your 2023 Freightliner Cascadia to control electric trailer brakes using the Hayes Air Actuated Trailer Brake Controller, part #HA100400C. However, we mostly recommend just using an electric brake…

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Answer 5

In order to determine the torque rating for the lug nuts on your trailer you will need to know check out the chart I attached that shows all of the torque specs for all the trailer lugs available based on stud size, wheel material and wheel size.

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Answer 6

The trailer brakes work on a separate circuit than the lights. You have a couple of options to control the electric brakes on the trailer. One option is to use an air over electric brake control, #HA100400C. This unit connects to the air brakes on…

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Answer 7

I do have a solution for your 2024 Kia Telluride that has the LED taillights that does allow it to have both a 4-way and 7-way plus install a brake controller but it is not with the #TK74CR which does not work for you based on the LED taillights.…

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Answer 8

A factory 7-way trailer connector isn't all you need to power a trailer's electric brakes. You still need a brake controller. Some Ford F-150s are equipped with a factory integrated brake controller, which you may have. If your 2012 Ford…

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Answer 9

You are correct, you should only be getting output when the brake is applied, or the override switch is activated. It sounds like the controller might be bad, but to make sure, you should probably bench test it before tossing it. Use a circuit…

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Answer 10

From what I could find, it looks like the plug for a trailer brake controller on your 2023 Nissan Frontier is located in the same location as the 2022 model year. That is behind the side panel by the OBD connector and is likely pushed back into the…

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Answer 11

Hello Dan, I can definitely help with this. It is completely normal for the Curt TriFlex brake Controller #C24VV to show the current gain setting when the brakes are applied, or when the manual override is pressed. It sounds like you have the gain…

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