- For vehicles originally equipped with 12 volt indicator voltage
- e.g. when installing:
- Indicators with a higher power input (watt) than original, e.g. Ducati Panigale
- Indicantors on vehicles with plus (+) and ground (-), e.g. English oldtimer
- DF combinations (indicator, rear light, break light) on vehicles with indicators running on minus, e.g. Indian Scout