Wiper Relay Unit: Inspection
WARNING: This page is about a different car, the 2021 Subaru Ascent. However, it is still accessible from the selected car via links, so may be relevant.
- Check the resistance between relay terminals.
Inspection conditions Terminal No. Standard Always A1 - A2 Less than 1 Ω A4 - A1 1 MΩ or more A3 - A4 1 MΩ or more Apply battery voltage between terminals B3 (+) and B2 (-). (Lo output condition) A1 - A2 1 MΩ or more A4 - A1 Less than 1 Ω A3 - A4 1 MΩ or more Apply battery voltage between terminals B1 (+) and B2 (-). (Hi output condition) A1 - A2 1 MΩ or more A4 - A1 1 MΩ or more A3 - A4 Less than 1 Ω - When measurement value is different from the specification, replace the wiper relay unit.