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This document must be delivered to and read by the end user and installer as it serves to provide you with the required information for proper and safe use of your STL product. Before operating this or any STL products the user and installer must read this manual all the way through. You will find important information in this manual that could prevent property damage and/or serious injury to the user and installer.
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If you have trouble call Customer Service at 800-757-2581 before proceeding. Maintenance While STL’s Light Bars are very durable, there are some things you need to keep in mind and practice to preserve the longevity and function of your Bar. •...
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ALPHA ® GRILLE / SURFACE MOUNT Wiring Diagram Wire Color Function Wire Color Function Positive Sync Red* White Black* Negative Blue Alternating Sync Programming Yellow Flash Pattern * Indicates a main power cable. NOTE: All cables except Negative and Sync contact +12 VDC. Specifications Voltage 12 VDC...
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ALPHA ® GRILLE / SURFACE MOUNT Alpha Flange (Included) • Seat the Alpha unit inside the Flange. • Position the Foam Protection Pad on the back side between the Flange and the vehicle. • Use the included hardware to mount the unit to the vehicle. Colored Lens Cover (Sold Separately) •...
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About Flash Patterns • All STL LED products are equipped with a non-volatile memory which will recall the last flash pattern when the Light Bar is turned on. • Set the flash pattern by pushing the Flash Pattern button on the Grand Control Box to cycle through the various patterns.
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