Dimmer Switch (Metro)
- Disconnect both turn signal/dimmer switch connectors at junction/fuse block located under left lower dash panel. See Fig 1
.
- Check continuity between Green/Black and Red wire terminals of connectors when dimmer switch is in high-beam position. Check continuity between Green/Black and Red/White wire terminals of connectors when dimmer switch is in low-beam position. If continuity is not present in either test, replace combination switch assembly.
Courtesy of GENERAL MOTORS CORP.