HARNESS TACH 92 DODGE-CUMMINS - R8912-92ISSPRO Wiring Harness for 2" Tachometer"ISSPRO Tachometer Harness Kit for the following Vehicle(s):1992+ 5.9L, 6.7L Dodge Cummins 2500"If you are installing an ISSPRO R5503 or R5504 Tachometer in your '92-'93 Dodge Turbo Diesel truck, you will need this Tach to OEM Wiring Harness to make it work.ISSPRO's "Classic" Series gauges have been widely used by many heavy duty OEM's for decades. Known for their rugged reliability, wide selection and availability, the classic series has set the standard in the automotive instrumentation market.