ARB Wiring Loom Model 3500520ARB Wiring Loom Model 3500520 With the introduction of the new ARB Intensity LED driving lights and their use of Deutsch waterproof connectors, ARB has developed a new loom based on the 3500440 Auxiliary Lighting Loom. The new loom features the same mouse style switch and harness, with Deutsch DT 06 connectors in place of the bullet type connectors used for ARB fog lights and IPF lights. Fuse Protected Mouse Style Push Button Surface Mount switch 105