Trailer Brake Controls: what Claude and GPT would buy

Two AI models chose on their own, with no web access. Nobody tested these products: this is what each one says, and how to check it.

Claude and GPT choose the same product: Tekonsha 90195

In Automotive, Claude and GPT choose the same brand in 60 of 112 categories.

Claude Opus 5.5 · October 27, 2026

Tekonsha Prodigy P3 90195

$400.99 at Trailerjacks on Nov 11Price shown on the store's page that day, excluding shipping; it may have changed.

Proportional braking with boost settings and clear diagnostics makes it the long-standing reference controller for electric trailer brakes.

Not for: Owners whose truck already has a factory integrated brake controller, those with surge-brake trailers, and anyone who will not mount a unit under the dash.

GPT 6.1 Sol · November 10, 2026

Tekonsha Prodigy P3 (90195)

Proportional braking, clear diagnostics, and support for electric-over-hydraulic brakes make it a versatile, easy-to-adjust choice.

Not for: Surge-brake trailers or buyers wanting a concealed, factory-style installation.

Which one fits you

simpler, smaller install

Tekonsha Prodigy P2 90885

Same proportional braking as the P3 in a smaller, simpler unit without the extra display features.

Not for: Those who want detailed diagnostics on screen.

no under-dash mounting, shared vehicles

CURT Echo (line)

Plugs in at the 7-way connector and is controlled from a phone, so nothing is mounted in the cab.

Not for: Drivers who want a physical manual override lever within reach.

off-road and rough terrain

REDARC Tow-Pro Elite (line)

Lets you switch between proportional and user-set modes, which helps on corrugated or off-road tracks.

Not for: Casual towers who will never need the mode switch.

Check before you buy

Proportional vs time-delayed. Prefer a proportional (inertia-sensing) controller, which applies trailer brakes in step with the vehicle's deceleration. Time-delayed units ramp up on a timer and give jerkier, less matched stops.Advertised: Proportional, inertia based (Trailerjacks)
Number of axles supported. Confirm the controller handles the number of braked axles you tow; most mainstream units cover one to four. Each axle adds magnet current the controller must supply.
Vehicle harness. Buy the vehicle-specific plug-in harness for your tow vehicle, if one exists, instead of splicing. It avoids cutting factory wiring and wiring mistakes.Advertised: Integrated 2-plug adapter port (Hitch Warehouse)
Factory integrated controller. If the truck has a built-in controller, an aftermarket unit is usually unnecessary. Integrated controllers already work through the vehicle's 7-way connector.
Electric-over-hydraulic support. If the trailer has electric-over-hydraulic brakes, make sure the controller has a mode for them. Not every controller drives EOH actuators correctly.Advertised: Electric over Hydraulic mode (Hitch Warehouse)

Specifications · 4 items

Display type: Full LCD display
Weight limits: 300 lb tongue / 3,500 lb trailer
Self leveling: Yes
Languages: English, French, Spanish

Taken from the pages of Trailerjacks and Hitch Warehouse on November 11, 2026, not checked.

Where to find Tekonsha Prodigy P3 90195

Hitch Warehouse
Trailerjacks

Also seen on Amazon.

Shops seen in search results on November 11, 2026. A shop missing here may sell it too. Nothing was checked by a person.

Brands that matter

Tekonsha: Long-running maker of the Prodigy and Primus controller lines.
CURT: Wide range including the Echo plug-in wireless controller.
REDARC: Australian controllers popular for off-road towing.
Hopkins: Budget-friendly controllers and towing electrical parts.

What to avoid

Time-delayed controllers for heavy or frequent towing
Splicing into brake light wires when a plug-in harness exists
Buying a controller for a surge-brake trailer

Questions

What does the gain setting do?

Gain sets maximum braking power; adjust it with the trailer loaded so the trailer brakes firmly without locking the wheels.

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