Thank you very much, these are very helpful. Here is list of the more important ground points for a basic EXP w/o all of the accessories from these diagrams. When the weather warms up I will see if I can locate them (and fill in the blanks) on the car and see if they look clean or not, and at a minimum put a wrench on them to break up any corrosion:
G111 - main negative battery cable, larger cable connects underneath to the bell housing, smaller cable connects to ___
G104 - lights and other accessories - left hand side - connects to ___
G105 - lights and other accessories - right hand side - connects to ___
G108 - PCM and engine sensors - connects to ___
G203 - PCM and engine sensor shields - connects to ___
Most of the sensors also have a dedicated ground wire/pin in the harness and this could also be corroded, too. For example, I saw a thread saying to wiggle/remove/reconnect the CPK sensor wire to break up any corrosion related to one possible no-start cause...
