JEGS Mopar Electronic Ignition Control Units & Accessories JEGS offers two options for ignition control on Mopar engines. Choose from the HiRev 7500® control unit with an OEM Appearance & modern electronics inside or the standard Orange control unit. The electrical connector on control unit plugs into all Mopar OEM and Mopar Performance wiring harnesses (both 4 & 5-pin harnesses). Mopar Performance Parts - Ignition and Electronic Parts Engine Wiring Harness. Mopar Performance stand-alone engine harnesses are designed to provide everything you need to properly wire your car in one simple confi guration. Each master wiring harness includes built-in fuses and relays for fans, pumps, auxiliary power, and more.