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Home >> Pontiac >> 1971 >> GTO Base, 6.6L Eng, Eng CD WS, Automatic Trans >> Repair and Diagnosis >> Heating, Ventilation & A/C (HVAC) >> HVAC Control Systems >> Automatic Temperature Control >> Description >> Other Control Units >> Lo Relay

Lo Relay

Mounted on side of air conditioning housing in engine compartment. Relay will be energized whenever selector control head in "Vent" or "De-Ice" position or when Engine Thermal Switch or In-Car Temperature Switch is closed. This will allow blower motor to operate at low blower speed (Vent position only; in De-Ice position, low relay will be energized but blower will be controlled by Hi Relay and will operate at high blower speed).

NOTE: Low Relay may be energized whenever ignition switch is "On" with selector control head in "Off" position.
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