Does any one here know if i need the connection that goes to what i believe is the thermostat housing on a Ls obd1? i swaped the b18a1 a 90 dx but the connections are diferent and the ls has 2 wire as for the dx has 3. do i need this connection? Ls 2 wires: 1. Black 2. Yellow/Green Dx 3 wire: 1. Yellow 2. Yellow/White 3. Green/White any help is greatly apreciated.