Blower Motor Relay: Testing and Inspection
BLOWER RELAYINSPECTION
Check for continuity between the terminals.
1. There should be continuity between No. 1 and No.4 terminals when power and ground are connected to No.2, and No.3 terminals.
2. There should be no continuity between No.1 and No.4 terminals when power is disconnected.
3. If the blower motor voltage does not operate properly, substitute with a known-good blower relay and check for proper operation.
4. If the problem is corrected, replace the blower relay.