Recommended Hitch and Trailer Wiring for a 2008 Freightliner M2 RV  

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Expert Reply:

Welcome back Vic! To add a hitch and wiring harness to your 2008 Freightliner M2 RV, I recommend the Curt Hitch item # C47CR, the 4-Way Upgraded Heavy Duty ModuLite item # # C59496, and the Universal Installation Kit for Trailer Brake Controller item # ETBC7.

The Curt item # C47CR universal hitch includes brackets that weld directly to your M2's frame. The 2" receiver has a 16,000 lbs towing capacity and a maximum tongue weight of 1,600 lbs. It works with frames up to 44" wide so it'll be perfect for your M2. The brackets will give you a 9" drop from your RV's frame.

The 4-Way Upgraded Heavy Duty ModuLite item # # C59496 will connect to the tail light circuits on your Freightliner and provide the lighting signals for the trailer connector. This will add a 4-way connection only.

To add a 7-Way, you will also need the Universal Installation Kit for Trailer Brake Controller item # ETBC7. The 4-way connector will plug directly into it. You'll then run the 12v wire to the battery, the white to a suitable ground, the blue wire to the back of your brake controller, and the yellow wire to your Freightliner's reverse circuit. The 12v wire and the brake controller wire are each 25' long. If you need longer runs, you'll want to grab a few extra feet of the 10 Gauge Wire item # 10-1-1.

What kind of trailer are you planning on pulling behind your M2?

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expert reply by: Jerred H

0

ETBC7
(click to enlarge)

John M.

8/3/2026

As far as I’m concerned, the hitch works perfect for flat towing my 2021 Tacoma. This being said, I had my hitch professionally installed by a welding shop that etrailer had recommended.

Jerred H.

8/3/2026

@JohnM That's what matters John! Happy the hitch is working so well for you. Thanks for taking the time to come back and share that feedback.