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Home >> Cadillac >> 1996 >> Seville SLS >> Repair and Diagnosis >> Engine Mechanical >> Engine Cooling Fan >> Component Testing >> Cooling Fan Relay Operation

Cooling Fan Relay Operation

To check relay operation, see COOLING FAN RELAY OPERATION TEST  table.

COOLING FAN RELAY OPERATION TEST

Operational Mode OFF LOW FANS HIGH FANS
Low Speed Cooling Fan Relay (#1) De-Energized Energized Energized
Series/Parallel Cooling Fan Relay #2 (1) De-Energized De-Energized Energized
High Speed Cooling Fan Relay #3 De-Energized De-Energized Energized
(1) The series/parallel cooling fan relay is a dual position switch and while de-energized, supplied a ground path for the low speed fan circuit.