Connect measuring instrument
To retain the radio code or PCM code, the following procedure is recommended:
- Set the measuring instrument to the highest possible current-measuring range.
- With two alligator clips, connect the measuring instrument to the battery ground and to the unoccupied second body ground which is always available for RHD or LHD.
- Remove ground strap from the body and secure against contact with the body. The entire vehicle current now flows through the ammeter.