There are 2 wires on the harness for this. There is another tach signal wire on the harness along with a wire for the CEL / MIL. One main wire to hook to the battery and everything else is clearly labeled and is plug and play.
Includes relays for system main, fuel pump and cooling fan. You will need to tap into the relays to run the signal to your fuel pump and fan. Unless you are an electrical novice, most anyone with entry level automotive electrical should find this harness pretty easy to install. If you want to put an LT1 where is doesn't belong, this is a simple and complete setup to get you up and running quickly. Take a good look at the pics to be sure this is the right item for you.The item "1994 1995 LT1 stand alone harness and OBD1 PCM, no trans, passkey, A/C, EGR, AIR" is in sale since Monday, December 7, 2020. This item is in the category "eBay Motors\Parts & Accessories\In-Car Technology, GPS & Security\Terminals & Wiring\Wiring & Wiring Harnesses". The seller is "rjwautomotive69" and is located in Manitowoc, Wisconsin. This item can be shipped worldwide.