Troubleshooting Curt T-Connector C56331 On 2014 Dodge Grand Caravan Not Having Power

Updated 07/02/2025 | Published 06/25/2021

Products Featured in This Question

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

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12 Gauge Wire - Black Primary - Per Foot

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$2.04

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

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$67.28

Deka Heat Shrink Butt Connector - 12-10 Gauge - Nylon Insulation - Yellow - Qty 5

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Hook Probe Circuit Tester

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Question:

installed the curt t-connector into 2014 dodge cran caravan. van lights work, but no trailer lights. voltmeter says .5 volts on all three tails of plug

asked by: Michael M

Expert Reply:

I am sorry to hear you are having a problem with the Curt T-Connector Vehicle Wiring Harness # C56331 on your 2014 Dodge Grand Caravan.

Since you are not getting power, I recommend first checking that the black wire that was run to the positive terminal over your vehicle's battery is securely connected to the battery terminal, and the fuse is fully inserted. Next check that this wire did not get pinched or burnt causing the power loss. If the wire was damaged in any areas, you will need to replace the damaged section with # 12-1-1 and heat shrink butt connectors # DW05745-5.

If the power wire looks good then using a circuit tester # PTW2993 test the black, green, yellow, and brown wires going into the module while you have the turn signals and head lights on. If you are getting power on these wires but not on the 4-way connector, then there is a short inside of the module, and the harness will need to be replaced.

I included a video of the #C56331 being installed for you to take a look at.

expert reply by: Samuel C

Steve

7/1/2025

I installed the Curt 56331on my 2017 Dodge caravan GT. Now the rear left turn signal is. The back doesn't work and front is flashing rapidly. I have double checked all the connections and fuse. Is there something I'm missing?

Jesse M.

7/2/2025

@Steve Hey Steve. First make sure the wiring harness plugs are fully seated on both sides. Sometimes if one plug is not inserted all the way it can cause issues like you are describing. Also check your ground and make sure you are connected to a bare metal surface with no paint or rust. Also make sure the black wire is securely connected to the positive battery terminal. If all of that checks out there is a possibility the module is bad. It is rare but not unheard of. You can check this using a wire tester and following the steps listed above.