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Primus® IQ, Proportional Brake Controller for Trailers with 1-3 Axles, Gray

Part No 90160
The Tekonsha Primus IQ electric trailer brake controller gives you dependable braking power in a compact design. As an industry staple for more than ten years, this proportional braking system provides a smooth braking response in any stopping situation. With its petite yet durable exterior, this trailer brake controller fits nicely under the dash, making it easily accessible from the driver’s seat without being in the way. While also compact, the brains of the Primus IQ are astute. This insightful brake controller has an easy-to-read LED display, self-diagnostic check to monitor your connection and trailer braking activity and is self-leveling when mounted within a 90-degree vertical range, so there’s no need to adjust the unit once it’s installed. It also features a power output knob to set your desired braking power, a boost option that lets you apply up quickly and easily to three levels of additional trailer braking power, especially when hauling heavier loads, and manual override. The Primus IQ was created to work with electric braking systems, works proportionally in reverse to make backing into tough spots a bit easier, and - like the Prodigy P3, Prodigy P2, and many other Tekonsha brake controllers – utilizes primary sensor technology to ensure the smoothest stop possible. When you’re done towing, the IQ’s snap-in dash mounting clip, Plug & Play port for two plug adapters, and removeable electrical connector allow the unit to be quickly stored. The Primus IQ is truly a complete trailer brake controller kit. It works with trailers with 1-3 axles, comes with all necessary mounting hardware, and is backed by a limited lifetime warranty.
  • PROPORTIONAL ELECTRIC BRAKE CONTROLLER: Provides automatic braking based on the intensity and rate at which you apply your tow vehicle’s brakes, giving you smooth braking thanks to an internal inertia sensor. This makes the Primus IQ brake controller ideal for general and heavy-duty emergency braking.
  • EASILY INSTALL AND STOW, THANKS TO PLUG & PLAY: The Primus IQ trailer brake controller has a snap-in dash mounting clip, Plug & Play port for two plug adapters, and removeable electrical connector so the unit can be easily unplugged, unclipped, and stored.
  • EASY-TO-READ LED DISPLAY: Digital LED display shows settings, real-time diagnostics, and alerts.
  • BOOST FEATURE PROVIDES EXTRA BRAKING POWER: Boost provides up to three levels of additional stopping power at the touch of a button, giving you confidence in stopping safely when you’re hauling heavier loads and/or need more power to stop.
  • VERSATILE: The Primus IQ electric brake controller is compatible with a wide range of vehicles including Ford, GM, Chevy, Dodge, RAM, Toyota, Jeep, and more with 2, 4, or 6 brakes (1-3 axles). Vehicle-specific Tekonsha Plug & Play brake controller wiring harness sold separately.
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Ships free & fast to local dealers
Ships free & fast to local dealers

We ship your order directly to your choice of one of our 1,250+ ShopHitches Network Dealers. More Info More Info

Expert installation available nationwide
Brand: TEKONSHA
Part Number: 90160
Warranty: Limited Lifetime Warranty
UPC: 783192023445
Dimensions: 4.5" x 2.5" x 7" (Shipping)
Finish: Gray Plastic
Weight: 1 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 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 Primus® IQ, Proportional Brake Controller for Trailers with 1-3 Axles, Gray. 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.

The display shows one dot or the display shows two dots.
The left dot is the power indicator; meaning that the control is powered and ready. The right dot is the boost indicator. This tells you that some level of boost is set.

Will the Prodigy or Primus IQ work with electric over hydraulic brakes?
These controls were designed to operate electric brakes that are activated by electro- magnets. They have not been tested for the use on electric over hydraulic brakes. Please contact the manufacturer of the hydraulic control unit for their recommendation.

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.

Display shows "PL"
The control detected a power loss on the Black wire during a braking event. Possible causes:
  • Applied brake pedal or manual lever while connecting the control to power.
  • Poor connection on black wire, Fuse or Circuit Breaker.
  • Fault circuit breaker or Fuse.

The display shows "og" or "OG"
The control detects an open ground. Possible causes:
  • Poor or no connection to ground on the White wire of the control.

The display is blank.
These controls will go into a Sleep Mode after approximately 15 minutes of detecting no movement or input. Possible causes:
  • Control is in sleep mode.
  • No power on Black wire of control.
  • Poor or no connection to ground on white wire of control.

The top or bottom horizontal bars are flashing.
If the top bars are flashing, this tells you that the control is mounted at too steep of an angle. If the bottom bars are flashing, this tells you that the control is mounted at too low of an angle.

No "C" with trailer connected or shows "nc" with trailer connected.
These controls have to have a complete circuit on the Blue wire to the brake magnets and then to ground, with the proper resistance and an inductive load. Possible causes:
  • Open on electric brake wire (Blue wire) of brake circuit.
  • Open on ground wire of brake circuit.
  • Power back feed on Blue wire.
  • Trailer has electric over hydraulic brakes.

Display shows "SH"
The control detects a short to ground on the electric brake wire (Blue wire). Possible causes:
  • Short to ground on electric brake wire (Blue wire).
  • Trailer has electric over hydraulic brakes.

Display shows "OL"
The control detects excessive current on the electric brake wire (Blue wire). Possible causes:
  • Short to ground on brake wire (Blue wire).
  • Trailer has electric over hydraulic brakes.

Will the Primus IQ work with electric over hydraulic brakes?
The Primus IQ was designed to operate electric brakes that are activated by electro-magnets. They have not been tested for the use on electric over hydraulic brakes. Please contact the manufacturer of the hydraulic control unit for their recommendations.