My engine service wire harness (oil light, starter sol., alt lamp, etc.) is in real bad shape--insulation flaking off on the motor side of the 8 wire junction block on the firewall. So far none are shorting out---but it's inevitable they will--at the worst time. I have made harnesses for non-turbo 240's but this is my first for a turbo---it's a 1984 245ti. The wire harness part for the fuel injection (K-jet) is in good shape -- so I want to use the existing wire stubs at the junction block as a starter to solder new wires in place. I'll run the new harness separately - splitting it for functions on the intake side and exhaust side. My dilemma--I haven't been able to determine what each of the wires services without disturbing the insulation---such as it is. The turbo uses all 8 spots - non turbos do not. Aside from the three I already mentioned -- plus oil pressure gauge, water temp and -- (a/c comp?) brings me to 6 spots. What are the other two for? thanks in advance -- Dave