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P3® Trailer Brake Controller, Proportional, 1 to 4 Axles

Part No 90195
P3 the industries most advanced electric trailer brake control. A true proportional braking system, P3 has several added features, making it the new standard for electric trailer brake controls.
  • 5 storable setting options for pulling different trailers or preferences of multiple drivers.
  • A distinct, easy-to-read LCD display with multiple screen color options.
  • Up-Front controls provide easy access to all P3 features.
  • Easy to understand diagnostics show output current, battery, brake, and output voltage.
  • A flashing red warning system alerts user to No Trailer Brake situations.
  • Select Electric over Hydraulic or Electric trailer brake mode.
  • Screen information display in English, French or Spanish.
  • The Original Boost feature allows for different levels of customized braking.
  • Compact, dash-hugging design.
  • Integrated Plug-N-Play port for 2-plug adapters.
  • Snap-in mounting clip allows user to remove and store the control when not in use.
  • Electric trailer brake control for up to 4 braking axles.
  • Limited Lifetime Warranty
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Expert installation available nationwide
Brand: Tekonsha
Part Number: 90195
Warranty: Limited Lifetime Warranty
UPC: 783192015686
Dimensions: 3.1" x 4.45" x 10.5" (Shipping)
Finish: Gray Plastic
Weight: 1.4 lbs

When used together, the following parts make up the product (Kit) at the top of the page. They can be purchased together as part of the kit or as separate components for replacement or repair; however, ALL of the following MUST be used in order for the above product to work as advertised.

Tool Sizes Needed
Replacement Part - Brake Control Bracket

Replacement Part - Brake Control Bracket

Part No 5906

Replacement Part, P3® Mounting Kit Bracket

Replacement Part - Brake Control Wiring

Replacement Part - Brake Control Wiring

Part No 7894

Trailer Brake Controller Harness, Universal Fit

This product is not vehicle specific.

Below is a listing of commonly asked questions and answers for the P3® Trailer Brake Controller, Proportional, 1 to 4 Axles. If you can't find the information you need here, please submit your question to us using the form in our contact page.

Select a question to view the answer.

Shows Overload No Brakes
The P3 detects excessive current on the brake wire (Blue wire). Possible causes:
  • Short to ground on brake wire.
  • Shorted brake magnet.
  • Moisture or corrosion in trailer connector.
  • No voltage on battery charge circuit (for electric over hydraulic brakes only).

Display only goes up to 0.0 to 4.2 when applying brakes.
With Proportional Type digital controls the vehicle must be in motion for the control to have output. If the vehicle is sitting still with the vehicle's brake depressed or stopping very slowly the voltage displayed will be very low on the control. The is normal operation.

Control shows Short To Battery-No brakes
The P3 detects a short to power on the brake wire (Blue wire). Possible causes:
  • Brake wire shorted to an external power supply
  • Moisture in trailer connector
  • Contamination in the trailer connector

Shows No Trailer Connected When Trailer Is Connected.
The P3 has to have a complete circuit to the brake magnets and then to ground. Possible causes:
  • Open on brake circuit (Blue wire).
  • Open on ground circuit of trailer brakes.

No Auto function (No Braking With Brake Pedal, but OK with the manual lever)
Possible causes:
  • No power on the red wire at the rear of the control, with brake pedal depressed. Check "Stoplight" voltage in the Help / Troubleshooter section of the P3's Menu 
  • Vehicle not in motion

Shows Output Shorted-No Brakes
Possible causes:
  • Short to ground on electric brake wire (Blue wire)
  • Shorted brake magnet.
  • Moisture or corrosion in trailer connector.

Shows Open Ground-No Brakes
The P3 detects an open ground. Possible causes:
  • Poor or no connection to ground on the white wire of the P3.

Shows Power Loss-No Brakes.
The P3 detected a power loss on the Black wire during a braking event. Possible causes:
  • Applied brake pedal or manual lever while connecting the P3 to power.
  • Poor connection on Black wire, Fuse or Circuit Breaker.
  • Faulty circuit breaker or Fuse.

Does the P3 brake control have a switch to turn off or does it stay on all the time?
The P3 does not have a switch to turn the brake control off, but after approx. 15 min. of no activity (brake pedal or manual operation) the brake control does go into a power saving mode and the screen will be blank.

What angle does the P3 have to be mounted at?
The P3 must be mounted in the direction of travel and should be fairly level from side to side. Front to back the control can be mounted at any angle.