Windshield Wipers Only Work on High Speed - It Still Runs Having ascertained that the switch is good, test the wiring harness. If the wiring harness is connected at either or both ends with a multiblock, consult a workshop manual -- many manufacturers and enthusiast websites publish schematics online -- to learn which wires and which terminals convey which wiper speed signals; draw a plan on a piece of paper showing Metra 72-1002 Speaker Wiring Harness - Crutchfield Metra 72-1002. These harnesses allow you to plug your new speakers into the factory connectors present in your vehicle's speaker openings. Note: Some aftermarket speakers have terminals that are wider than this harness's slide-on connectors. You may need to widen the harness's female slide-on connectors, or use the slide terminals that may be included with the speakers. #4 Hand Plane | eBay - Electronics, Cars, Fashion, Collectibles We would like to show you a description here but the site won’t allow us.Learn more