1995 Impala SS, Caprice, Roadmaster wire harness info The Caprice harness uses an underhood fuse block that is part of the engine harness. It is easier just to leave it in the harness and use it. 1995 Caprice / Impala SS / Road Master LT1 & L99 Engine Wiring Schematics: PCM POWER & GROUND. MIL AND DLC. ENGINE DATA Chevrolet Caprice Engine Wiring Harness - Wiring Harness Search our online engine wiring harness catalog and find the lowest priced discount auto parts on the web. We sell wholesale to the public. We offer high quality new, OEM, aftermarket and remanufactured Chevrolet Caprice Engine Wiring Harness parts.