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 is not operated well, substitute with a known-good blower relay and check for proper operation.
4. If the problem is corrected, replace the blower relay.