ABS VAG code

Car is a 2000 Golf GLS 2.0

Had the ABS light go off yesterday. VAG-COM pulled the following

VAG-COM Version: Release 311.2-N

Control Module Part Number: 1J0 907 379 P Component and/or Version: ABS 20 IE CAN 0001 Software Coding: 03504 Work Shop Code: WSC 00000

1 Fault Found: 00668 - Supply Voltage Terminal 30 16-10 - Signal Outside Specifications - Intermittent

Thats it. Bentley is really bad on ABS troubleshooting. Which Terminal

30? The light (like the code says) is intermittent. Sometimes it comes on sometimes it does not.

any help would be appreciated.