Starts and then stops after a few seconds isn't a wiring problem unless the wires from the speed sensor are bad. You will need to verify at the Klima socket that all the inputs are correct.
You will have to vent the AC to change the speed sensor.
Usuall cause of cutout after a few seconds is a bad belt or tensioner.
1972 220D ?? miles
1988 300E 200,012
1987 300D Turbo killed 9/25/07, 275,000 miles
1985 Volvo 740 GLE Turobodiesel 218,000
1972 280 SE 4.5 165, 000 - It runs!