BWD® is your go-to source for a full line of accessory and electronic relay solutions that support all key engine components and systems, including: daytime running light kits, blower motor resistors (two or four), and TechSmart® HID Ballasts.

Blower Motor Resistors

On most full-size GM trucks and SUVs from 2001–2007, the blower motor resistor has two common failure modes: water damage and excess heat. The GM vehicles are unable to manage condensation. If the duct is clogged, condensation will collect, creating a pool of water that can seep into, and flood the blower motor  resistor module. Worn OE blower motors can create a demand for current that also damages the module. The excess current melts the wiring and plastic shroud, damaging the interface pins on the controller’s circuit board.

BWD's RU1321 Blower Motor Resistor features several improvements over the OE, including an umbrella cover design that prevents water intrusion and a larger-output power device and upgraded two-ounce copper board that protects against overheating. 

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Larger output power device mounted directly to heat sink improves heat dissipation

Improved umbrella cover design prevents condensation from entering module

Nichrome wire winding for robust durability and extended life

Upgraded 2 oz. copper board increases conductivity and power dissipation to prevent overheating

Manufactured in the USA

Included wire harness undergoes voltage drop testing to ensure performance

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How to Replace a Blower Motor Resistor

In this "Installation Spotlight" video, our ASE-certified Master Technician is working on a 1993 Jeep Cherokee with a blower motor that only works on the high position. Here's how to replace it.

Daytime Running Light Kits

BWD® Daytime Running Lights are 100% tested to verify both mechanical and electrical switching performance. Our switches are designed using copper alloy conductors to ensure superior electrical conductivity with low resistive losses.

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Compact, solid state DRL units exceed all NHTSA, FMVSS, CMVSS and CSA guidelines

TechSmart® HID Headlights Ballasts

Despite their superiority to halogen headlights, HID Headlights can still fail, typically from overheating, moisture intrusion, damage from a frontal collision, or burning out from repeated duty cycles. If one of those scenarios occurs, it can cause the system to become inoperative, creating reduced visibility and safety concerns for drivers and motorists.

To help restore proper lighting function to HID light systems, we created OE-Exact Match HID Headlight Ballasts. That means they are direct-replacement parts that match the fit, form, and function of the originals. Plus, as DOT-certified parts, our HID Headlight Ballasts comply with Federal Motor Vehicle Safety Standards.

For repair tips on HID lighting, check out the following TechSmart-original articles: Don't Get Burned by HID Lighting and 6 Tips to Remember When Repairing HID Lighting Systems.

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New SKUs Available

Heavy-duty casings around electronics ensure durability

Internal circuitry matches OE design to ensure performance

Plug-and-play design means no need for reprogramming

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