The following testing procedures and manual apply for VW electrical and transmission system. Here you will find detail and brief explanation on how to perform the electrical testing on you VW. It provides list of test steps. Test requirements: Battery Positive Voltage (B+), Fuses 14 (S14) and 21 (S21), Transmission Ground (GND) connections, Check Ground connections for corrosion and poor contact and Check Battery Ground (GND) strap as well as Ground (GND) strap between Battery and transmission. Note that before replacing a particular component, test the wiring and connections and, particularly if specified values are below 10 ohms (10 ), repeat the resistance measurement.
Find the detail information of VW electrical and Transmission system test in the following manual. (source: europeantransmissions.com)