4 Pin Trailer Wiring Harness for a 2016 Dodge Grand Caravan

Updated 10/09/2026 | Published 10/06/2026

Question:

Hi, I have a 2016 dodge grand caravan and want 4 pin trailer wiring. Theres a empty plug in compartment for jack I believe this is used for. Do you have a specific product for my needs?

asked by: ROBERT S

Expert Reply:

Hi Robert, yes, we do have a 4 pin wiring harness for your 2016 Dodge Grand Caravan. you need the Curt T Connector Vehicle Wiring Harness with 4 Pole Flat Trailer Connector, part # C56331.

This harness plugs inline with the Grand Caravan’s taillights and provides the 4-pin connector you need for your trailer. It does require the black power wire to be run up to the vehicle battery for power. The empty plug in the rear cargo area where the jack is stored is not where this harness connects, so this particular harness will not simply plug into that location. Each side of the harness will plug in line with the tail lights so there is no splicing required. The # C56331 is the only custom 4 pin harness we currently carry for your Caravan so I am not familuar with another wiring harness that plugs into a different spot.

If you are also looking for the hitch, you can use Curt Trailer Hitch Receiver part # 13364.

What kind of trailer are you planning to tow?

expert reply by: Heather A

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Robert S.

10/6/2026

Hi Heather, I bought the hitch last year from etrailer. It's to hold an ebike rack. While it's been working fine however if I cover the ebike, it mostly covers the tail lights, so I'm looking for a magnetic bluetooth tail light solution.

Heather A.

10/6/2026

@RobertS Oh ok, I got ya. We don't have a bluetooth solution but we do have the wireless magnetic tail lights Optronics Wireless Magnetic LED Trailer Lights Battery Powered Stop/Turn/Tail Kit with Transmitter Part # OPT88UB that attaches to the top of your vehicle. The wireless transmitter plugs into the 4-pin wiring harness on your Caravan. There are other options that attach to your bike rack. Do you know which ebike rack you have? I may have something specific to your rack.

Robert

10/9/2026

@HeatherA It's a Weize 2 ebike rack from Amazon. It's solid, with same features of much more expensive racks. Incredibly $50 cheaper now than 1.5 years ago. I've driven 25k miles, mostly with a cover that blocks lights and plate but added a duplicate plate that flips up when rack isn't being used. I haven't gotten stopped but don't want to push my luck.

Heather A.

10/9/2026

@Robert Oh Nice, I just looked up the design of the Weize ebike rack and the Hollywood Racks Safety LED Light Bar for Bike Racks Part # HLY54RR looks like it will work well for you. Check it out!