Question about 1997 Pontiac Sunfire
There isn't a "sensor" per say. The DRL's are controlled by a microprocessor on the instrument cluster. The processor looks for a voltage drop on the ground side of the headlamp circuit. If it see's voltage it will ground the DRL relay.
The DRL relay is under/behind the drivers side headlamp assembly. It will have two orange, black, blue, and green w/ black wires at the connector.
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Posted on Oct 01, 2010
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Posted on Jan 02, 2017
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