BODY ELECTRICAL SYSTEM — Heater BE-63 HEATER Troubleshooting Problem | Possible cause | Remedy | Page Blower does not work when fan switch is on | Circuit breaker OFF | Reset breaker and check for short | BE-4 | Heater main relay faulty | Check relay | BE-63 | Heater blower switch faulty | Check switch | BE-63 | Heater blower resistor faulty | Check resistor | BE-64 | Heater blower motor faulty | Replace motor | | Wiring or ground faulty | Repair as necessary | Incorrect temperature output | Control cables broken or binding | Check cables | BE-64 | Heater hoses leaking or clogged | Replace hose | | Water valve faulty | Replace valve | | Air dampers broken | Repair dampers | | Air ducts clogged | Repair ducts | | Heater radiator leaking or clogged | Replace radiator | | Heater control unit faulty | Repair control unit | Heater Blower Switch INSPECTION OF HEATER BLOWER SWITCH INSPECT SWITCH CONTINUITY Inspect heater blower switch continuity. Switch position | Terminal 10 | 4 | 9 | 5 | 8 | 6 0* | 7 OFF | | | | | | o—o | I | o—o | | | | | o—o | II | o—o | o—o | | | | o—o | III | o—o | | | o | | o—o | IV | o—o | | | | o | o—o | * For illumination light If continuity is not as specified, replace the switch. Heater Relay INSPECTION OF HEATER MAIN RELAY 1. INSPECT RELAY CONTINUITY (a) Check that there is continuity between terminals 1 and 3. (b) Check that there is continuity between terminals 2 and 4. (c) Check that there is no continuity between terminals 4 and 5. If continuity is not as specified, replace the relay.