Operation CHARM: Car repair manuals for everyone.
Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

(Some people have issue connecting. LEMON is investigating. For now, use Firefox or change your DNS server)

Or, hide this message: temporarily or permanently

Wiper Relay: Testing and Inspection

Rear Wiper Relay Inspection

1. Check that there is no continuity between terminal "3" and "4". If there is continuity, replace relay.
2. Connect battery positive (+) terminal to terminal "2" of relay.
3. Connect battery negative (-) terminal to terminal "1" of relay.
4. Check continuity between terminal "3" and "4". If there is no continuity when relay is connected to the battery, replace relay.