Stupid light question
Thread Starter
Team Owner
Joined: Oct 2004
Posts: 35,065
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From: Bergen County, NJ Democrats, doing for the country what they did for Michigan
Stupid light question
My car is a 1990. The headlights are manual, you turn them on when it gets dark via a switch on the dash. However, there's a little plastic round thing in the middle of the dash toward the windshiled. It looks like a light sensor like my other cars that have automatic headlights. I's in the middle of the plastic panel where the defrost blows through. What is that?
Racer
Joined: Jul 2004
Posts: 251
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From: Yarmouth ME
Originally Posted by jsup
My car is a 1990. The headlights are manual, you turn them on when it gets dark via a switch on the dash. However, there's a little plastic round thing in the middle of the dash toward the windshiled. It looks like a light sensor like my other cars that have automatic headlights. I's in the middle of the plastic panel where the defrost blows through. What is that?
Intermediate
Joined: Jan 2005
Posts: 34
Likes: 0
From: Central Pennsylvania
Originally Posted by Lars87
I belive it is a sensor thats controlles the light in your digital cluste..... 
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Team Owner
Joined: Dec 1999
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From: Lacey WA RVN 68-69
NCM Sinkhole Donor
It's called a "Sun Load Sensor" and it is part of the climate control system. It's there on all later C4's but only the RPO C68 Electronic Climate Control System got the components that are under the little dome.
The temperature sensor for the outside air temp display is located to the passenger side of the A/C condensor under the car where air is taken in for the radiator.
The temperature sensor for the outside air temp display is located to the passenger side of the A/C condensor under the car where air is taken in for the radiator.
Race Director
Joined: Jul 2004
Posts: 16,795
Likes: 62
From: Lake Havasu City, AZ
It is a noxious emissions (gas) detector. When it senses impurities in the passeneger compartment air, it opensthe baffle in the ventilation system allowing fresh air to enter the vehicle... 
