Can I Tap into the Rear Fuse Box to Install the Tekonsha Prodigy RF Instead of to the Battery?

Updated 04/16/2025 | Published 04/13/2025

Question:

2014 Honda Odyssey there is a rear fuse box in the back storage area under a panel. Is it ok to tie in the 12 volt power from the seven pin connector to the 12 volt 10 wire that is feeding that panel instead of running the wire all the way to the battery?

asked by: Bob M

Expert Reply:

Hello Bob,

When installing the Tekonsha Prodigy RF Wireless Brake Controller # TK94FR on your 2014 Honda Odyssey, I understand why you would be wondering if you can save some time by connecting the 12V power wire from your 7-way trailer plug to the 12V circuit in the rear fuse panel instead of running it all the way up to the battery, but it’s actually really important to run that power wire directly to the vehicle’s battery, and here’s why.

The Prodigy RF brake controller relies on a clean, uninterrupted power source to work properly especially since it uses a Bluetooth signal to communicate between the trailer and the controller in your cab. Tapping into the rear fuse box may seem convenient, but that circuit wasn't designed to carry the kind of load this setup can draw. You could end up with interference, voltage drop, or blown fuses, and even worse it could cause signal issues or inconsistent braking. That’s the last thing you want when towing.

Running a dedicated 10-gauge wire from the positive terminal of your battery ensures the system gets stable, reliable power. This setup not only protects the vehicle and trailer, but it also gives the RF system the clean power it needs to function smoothly.

So even though it's a bit more work up front, taking the time to wire the 12V line properly pays off in reliability, safety, and peace of mind every time you hit the road.

What kind of trailer are you pulling?

expert reply by: Kate F