Quick Fix: 1985 w123 Tach & A/C after EGR Failure

After reading through that thread several times and staring at the wiring diagrams associate with adding jumper wires to the EGR connector I think:

1. The white wire from the RPM sensor needs to go to the top 'W' pin on the Tach

2. The brown wire on the RPM sensor needs to be grounded

3. The bottom '+' pin on the tach needs 12v power


I'm still unsure about the middle 'G' pin on the tachometer. I need to look the tach connector from the donor car and see if it is even used. The 'G' indication makes me think it is possibly a ground from the tachometer, but I'm not sure yet.