Fuse box diagrams (location and assignment of electrical fuses and relays) Isuzu Trooper/Bighorn / Opel/Holden Monterey (1992, 1993, 1994, 1995, 1996, 1997, 1998. The Isuzu Philippines Corporation, IPC in short, is an automotive, commercial vehicle, engine and bus manufacturer with headquarters in Biñan, Laguna in the Philippines. The company was founded on 7 August 1995 with an investment of first Billion Philippine peso. The plant operates as a joint venture between Isuzu and Mitsubishi, with each holding 35%. Other shareholders, with a share of 30%.