C4 Photosensor
Thread Starter
Instructor
Joined: Jun 2003
Posts: 238
Likes: 0
From: Woodstock Ga
C4 Photosensor
Hi all.
I have a 1990 vette. The little photo sensor that controls the daylight dash brightness is going bad i think. Has anyone ever replaced this? Can i just buy the sensor somewhere. I would hate to replace the whole DIC. Everything else on the unit works fine.
Any help would be appreciated.
Thanks
I have a 1990 vette. The little photo sensor that controls the daylight dash brightness is going bad i think. Has anyone ever replaced this? Can i just buy the sensor somewhere. I would hate to replace the whole DIC. Everything else on the unit works fine.
Any help would be appreciated.
Thanks
Drifting
Joined: Nov 2001
Posts: 1,498
Likes: 0
From: Bucks county Pa
Re: C4 Photosensor (gregfloyd)
I replaced mine because the plastic dome was missing. It is an easy fix. I dont know where you would get one. Mine came from Contemporary Corvette. That should do the fix.
Melting Slicks
Joined: Jan 2003
Posts: 2,167
Likes: 0
From: What did the 5 fingers say to the face? SLAP!!
Re: C4 Photosensor (gregfloyd)
I believe that's a discontined part. Corvette boneyard would be your best bet. What makes you think it's going bad? Best way to check is to test it at night, in the dark. Turn the key on to illuminate dash. Leave your headlights off. Shine a flashlight at the photocell, and the dash should get brighter.
Racer
Joined: Jul 2002
Posts: 476
Likes: 72
From: MA
Re: C4 Photosensor (gregfloyd)
Where is this Photosensor located, and do I have one on my 92 ? There is a "sunload sensor" on top of the dash, in the defroster vent, but I'm pretty sure that's part of the electronic AC system.
Melting Slicks
Joined: Mar 2003
Posts: 2,898
Likes: 0
From: Oklahoma City Oklahoma
Re: C4 Photosensor (*89x2*)
If you cover it up, the dash will get dimmer, unless you turn on the lights. I know it doesn't make sense, but the dash will think it's night, and basicly dim out all the way until you turn on the lights. I think the instrument cluster is supposed to be super dim at night without lights on so when you're sitting in your Vette, and spying on your girlfriend's house, the dash won't illuminate the entire passenger compartment so she can see you. :lol:
Makes sense to me! :thumbs:
Makes sense to me! :thumbs:
Safety Car
Joined: Jul 2001
Posts: 3,886
Likes: 0
From: Northern California
Re: C4 Photosensor (Mikesa)
Where is this Photosensor located, and do I have one on my 92 ? There is a "sunload sensor" on top of the dash, in the defroster vent, but I'm pretty sure that's part of the electronic AC system.
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Safety Car
Joined: Jul 2002
Posts: 3,529
Likes: 1
From: Rehoboth MA
Re: C4 Photosensor (Mikesa)
? There is a "sunload sensor" on top of the dash, in the defroster vent, but I'm pretty sure that's part of the electronic AC system.
Racer
Joined: Jul 2002
Posts: 476
Likes: 72
From: MA
Re: C4 Photosensor (KyleBst264)
The sunload sensor is one of three sensors in the C68 Electronic AC. It measures the amount of heat generated from the sun shining into the vehicle. There are two other sensors, one for outside temperature and one for interior temp. All three of these sensors feed info to the AC system.
