LAJBZ Electronic Brake Control - Proportional Trailer Brake Controller with Easy-to-Read LED Display, Self-Diagnostic, Plug & Play (Compatible with Tekonsha 90160 Primus IQ) Review (2026)

What this controller does

This is a proportional electronic trailer brake controller from LAJBZ, designed to be compatible with the Tekonsha 90160 Primus IQ mounting bracket and vehicle specific wiring harness system. A proportional controller applies trailer braking in proportion to how hard the tow vehicle is braking, which generally gives smoother, more predictable stops than a time delay controller. The listing highlights an easy to read LED display for monitoring output and braking activity, plus a self-diagnostic feature meant to alert the driver to wiring or connection problems before they become a safety issue on the road.

Installation and compatibility

Because it is built to work with the existing Tekonsha 90160 Primus IQ harness and mount, the appeal of this controller is a plug and play installation for anyone whose tow vehicle already has that connector system wired in, or who is willing to add the vehicle specific harness sold separately. This approach avoids rewiring the dash and lets the new controller drop into the same physical space as a genuine Tekonsha unit. Buyers should still confirm their specific tow vehicle has, or can be fitted with, the correct Tekonsha style harness connector before ordering, since brake controllers in this category are not universal across every vehicle without the matching harness.

Living with it while towing

Day to day, a proportional controller like this one is meant to require less manual adjustment than older time delay designs, since it reads the tow vehicle's own braking and scales trailer brake output accordingly. The LED display lets the driver check that the controller is active and see rough output levels at a glance, which is useful for confirming the trailer brakes are engaging before pulling out on a highway. Because this is a lower cost alternative to the Tekonsha original rather than a Tekonsha branded product, owners should keep an eye on long-term reliability and be prepared to troubleshoot the self-diagnostic alerts themselves rather than relying on Tekonsha's own support channels.

How it compares with other brake controllers

Our score of 7.8 out of 10 ranks this controller third of six in the site's RV brake controller guide, behind the REDARC Tow-Pro Liberty and a Timilge proportional controller with a digital display and boost mode, both of which carry stronger brand recognition or extra features. It scores ahead of another Tekonsha-compatible clone controller and two older time delay style controllers, reflecting that its proportional braking and LED display put it ahead of budget alternatives even without the backing of an established brake controller brand. Shoppers comparing this middle of the pack position should weigh how much the Tekonsha compatible harness saves on installation against the extra features and support that the higher ranked rivals offer for a bit more money.

Who should buy this controller

This controller is a reasonable pick for tow vehicles already wired for a Tekonsha 90160 Primus IQ style harness where the owner wants proportional braking and a diagnostic display without paying for the Tekonsha name. It is not the first choice for owners who prioritize a long track record and manufacturer support above saving money, where the REDARC or a genuine Tekonsha unit is the safer bet. Whichever controller you install, test the trailer brakes at low speed in a safe area before towing on the highway, and follow the harness and controller manufacturer's wiring instructions closely.

Frequently asked questions