Troubleshooting Active Running Light Trailer Wiring Circuit on 2019 Kia Soul Wiring
Question:
This is a follow-up to your reply. The brown wire leading from my LED taillight to the Curt module is hot when the headlights are on. But after the Curt module leading to the trailer wiring harness, the brown wire shows no power when tested with a circuit tester. Interestingly, when a flat-pin harness tester is connected as shown in my first posting, the brown wire running lights circuit is illuminated on the harness tester. That seems weird, as the post-module brown wire shows no power! Maybe theres just enough power coming through the brown wire to illuminate the small green light on the flat-pin tester. I suspect the Curt module is the issue. Would you concur, or am I failing to understand this issue? Thanks
asked by: Dave
Expert Reply:
If the lights on your tester, like the Brophy # F5CT, are lighting up properly then it sounds like your Curt Wiring Kit # C56220 is working just fine on your 2019 Kia Soul. When you start applying another circuit tester like part # PTW2993 it is dimming the lights because that power is being sent through the tester instead of "stopping" in the tester.
The running lights shouldn't be on unless the headlights are active on your vehicle. I would try hooking up your trailer to see if the running lights actually come on when the larger trailer circuit is connected instead of the smaller tester like what you have.
If the running lights on the trailer turn on then you'll want to test the brown wire going into the Curt T-Connector. If this is always hot then that means the running light circuit on your Kia Soul is hot and the module is just sending power to the 4-Way as it's supposed to. If the brown wire going into the module isn't hot then that means the module is sending power to the running light circuit on it's own and you'll want to get it replaced under warranty to avoid further issues. You might consider switching over to the T-One Wiring Kit # 118637 instead because we've found the Tekonsha brand to be a bit more reliable when it comes to the wiring.
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Products Referenced in This Question
T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector
- Custom Fit Vehicle Wiring
- Trailer Hitch Wiring
- Powered Converter
- Custom Fit
- 4 Flat
- Tekonsha
more information >
Brophy 4- and 5- Way Flat Circuit Tester
- Electrical Tools
- Testers
- Circuit Tester
- Tow Function Tester
- Black
- Brophy
more information >
Product Page this Question was Asked From
Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector
- Custom Fit Vehicle Wiring
- Trailer Hitch Wiring
- Powered Converter
- Custom Fit
- 4 Flat
- CURT
more information >
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Dave
6/29/2022
This is a follow-up to your reply. The brown wire leading from my LED taillight to the Curt module is hot when the headlights are on. But after the Curt module leading to the trailer wiring harness, the brown wire shows no power when tested with a circuit tester. Interestingly, when a flat-pin harness tester is connected as shown in my first posting, the brown wire running lights circuit is illuminated on the harness tester. That seems weird, as the post-module brown wire shows no power! Maybe theres just enough power coming through the brown wire to illuminate the small green light on the flat-pin tester. I suspect the Curt module is the issue. Would you concur, or am I failing to understand this issue? Thanks