Operation CHARM: Car repair manuals for everyone.
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Keyless Entry Relay: Testing and Inspection

Keyless Answer Back Relay Inspection

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