Impromptu Electrical Tech Session MGB Headlight Switch Wiring Mack's Golden Pheasant Restaraunt March 19, 2001 Click on small images for larger images. - Larger pics average 35KB. When the going gets tough, the tough get going. When this MGB had a headlight switch failure in the late night darkness, the logical thing to do was to jumper the wiring harness and drive it home. ©2001 Chicagoland MG Club, All rights reserved.