Installing a Brake Controller and 7-Way on a 2007 Dodge Sprinter RV

Question

Question:

I have an Itasca Navion on a 2007 Sprinter 3500 chasis It came with a 6 pin trailer wiring connector I added a converter to allow 4 pin trailer connection That works fine I now have another trailer with a 7 blade RV connector The trailer has electric brakes Not sure f the Sprinter has a brake controller connector in the cab I read there may be one green under the drivers seat. Looks to me like I need to start over and get a 90885 - Tekonsha Prodigy P2 controller for the vehicle and a ETBC7 - Universal Installation Kit for Trailer Brake Controller - 7-Way RV and 4-Way Flat - 10 Gauge Wires

asked by: Tom B

0

Expert Reply:

Since your 2007 RV on the Sprinter chassis already has a trailer connector but it does not match either trailer, using the 4 and 7 way installation kit # ETBC7 would be a good idea. This will also provide you with the accessories needed to install the P2 brake controller # 90885.

If that green wire does go back to the trailer connector then you will not have to run the blue wire from the connector to the brake controller. You can test it by applying 12 volt power to the wire using a separate battery then using a circuit tester, like # PTW2979 if needed, at the trailer connector to see if power is getting back to it.

Otherwise you will follow the FAQ and video I have linked for installing an ETBC7. One thing that will be different is attaching the wiring for the lights. Instead of plugging into the 4-Way, you will cut off the 4-Way of the ETBC7, remove the wires from the 6-Way on the vehicle, and splice them to the 4-Way wires.

On the ETBC7 4-Way wires, white is a ground, yellow is let turn and brake lights, green is right turn and brake lights, and brown is running lights. Use the circuit tester to verify the trailer connector wire functions because you cannot go by color.

expert reply by: Michael H

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Answer 1

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 2

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Answer 3

Load range B trailer tires are going to have a lower capacity than C load range tires. Basically that, psi rating, and the ply rating are the only differences. A higher load range tire would last a little longer than lower load ranges of the same…

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Answer 4

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 5

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Answer 6

The three most common lug stud sizes for a trailer are 1/2"-20, 9/16"-18, and 5/8"-18. In order to make sure you get the correct lug nuts you need to measure the lug studs on the trailer now as we have no way to look this up for…

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Answer 7

Your math is correct in your trailer weight load example. If a fully-loaded tandem axle trailer weighs 4000-lbs then each of the 4 tires will bear 1/4th of that load, or 1000-lbs. In this case a tire rated for 1300-lbs would provide a good safety…

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Answer 8

To find the load capacity for your axle you should look on the trailer VIN plate or sticker that lists the VIN number. The weight rating of the axle should be listed on that same plate or sticker. Also, the axle could have a tag or plate on it that…

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Answer 9

You can add larger wheels and tires to a trailer as long as you have enough room for the larger size. The main clearance issues we find when putting larger tires and wheels on a trailer is from the top of the tire to the fender and from the inside…

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Answer 10

To determine the size of the hub assembly you need to purchase you have to determine which bearings are in the old assembly. If the old assembly has L44649 inner bearings, you would use the hub you chose #8-258-5UC1. If the inner bearings are marked…

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Answer 11

A BT8 spindle would have a diameter of .99 of an inch where the bearings would both install and would have a diameter of 1.24 where the great seal would ride. That would require a hub part #AKIHUB-440-2-1K for an idler hub. A BTR spindle would have…

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Answer 12

I did some checking and the hub/drum we offer that will work for you is the part #8-430-5UC3. This uses the same bearings as the 8-415 and will be an exact fit aside from the fact this is a non-ABS setup and the 8-415 came in an ABS setup and non-ABS…

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