Hitch Wiring And Brake Controller For A 2025 Ram ProMaster 3500

Updated 08/15/2025 | Published 07/17/2025

Products Featured in This Question

Redarc Tow-Pro Liberty Brake Controller w/ Universal Wiring Harness - Dash Knob - Proportional

(2504)

$217.00

Tekonsha Prodigy P3 Trailer Brake Controller - 1 to 4 Axles - Proportional

(6643)

$169.94

Curt Trailer Hitch Receiver - Custom Fit - Class III - 2"

(142)

$340.58

Curt Trailer Hitch Receiver - Custom Fit - Class III - 2"

(273)

$195.93

Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector

(46)

$92.60

Universal Installation Kit for Trailer Brake Controller - 7-Way RV and 4-Way Flat - 10 Gauge Wires

(3397)

$121.25

Question:

Have a 2025 Promaster 3500. Want to install a hitch, electric, brake control, and a 7way plug. Can you provide me with the parts I would require? Thank you

asked by: Bob

Expert Reply:

Hi Bob!

We definitely have what you need to get your 2025 Ram ProMaster 3500 set up for towing! First, do you know if you have an EXT model? The Curt Hitch # C13295 will fit both the EXT and non EXT models, but if you do not have that, the Curt Hitch # C13207 does have a higher capacity.

You will need a few parts for the wiring and will start with the Curt 4-flat # C58DR. I know you said you want a 7-way, but bear with me. Once the 4-flat is installed, you will need our Universal Installation Kit for Trailer Brake Controller # ETBC7. This will piggyback off the 4-flat and you will need to run less wires this way (I have a diagram below showing what you will need to do.

Last is the brake controller. I saw you were looking at the Redarc Tow-Pro Liberty Brake Controller w/ Universal Wiring Harness # RED52VR and that is the one I personally would choose. I am 6'5" and tend to smack my knee into the ones that install under the dash in the footwell. But, I should note that it can only handle up to 2 axles. If you wanted something with a bit more capacity and don't mind a controller in the footwell, you could go with the Tekonsha Prodigy P3 Trailer Brake Controller # 90195. It can handle up to 4 axles and is the best one on the market.

Do you know what you will be towing?

expert reply by: Lazer S

ETBC7 Wiring Diagram
(click to enlarge)

Lazer S.

8/15/2025

Hey Bob, Did you get a chance to figure out if your ProMaster is an EXT model and decide on which hitch and brake controller to go with? I'm curious to know how everything worked out for you, as it could really help others in a similar situation. Let me know if you need any more assistance!