LT1 Based Engine Tech 1993-1997 LT1/LT4 Engine Related

What is this black box on drivers side, underneath the hood alignment post?

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Old May 12, 2003 | 11:02 PM
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Black94mula's Avatar
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What is this black box on drivers side, underneath the hood alignment post?

Towards the front of the car, right underneath the screw post that raises or lowers the front edge of the hood.
Old May 12, 2003 | 11:32 PM
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Fuse and relay box

Dave
Old May 12, 2003 | 11:38 PM
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Naw, not that one, if your looking into the engine bay from over the drivers side fender though, its to the left and more towards the front of the fuse and relay box. Its got 2 connections going into it I think.
Old May 13, 2003 | 03:07 AM
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That's like..the pop-up headlight relays I believe...I had to "move" it when I put in my CAI...
Old May 13, 2003 | 01:43 PM
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Originally posted by Laymaster
..the pop-up headlight relays I believe...
That would explain why I don't have it!

Dave
Old May 13, 2003 | 09:00 PM
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It's the Firebird driver protection box. It lowers hp by 20%. That's why Camaros are so much faster. Leave it alone, it's for your own good.
Old May 13, 2003 | 10:01 PM
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It’s the “Headlight Controls Module”. It has all the logic for operation of the headlights. It senses back EMF to tell when they are closed or open and cuts power to the motors accordingly.
Old May 13, 2003 | 10:18 PM
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Originally posted by Bud M
It's the Firebird driver protection box. It lowers hp by 20%. That's why Camaros are so much faster. Leave it alone, it's for your own good.
LMAO

I wish I had one of those in my car so I could disable it!

Dave
Old May 14, 2003 | 01:25 AM
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Be careful where you relocate that box to when you get the CAI, mine was too close to the fender and got wet. Water leaked down between the fender and the hood and soaked that module.

Guess what? headlights didn't work and that "dealer only" black box cost $380 to replace.
Old May 14, 2003 | 06:37 AM
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Okay, now this could go along with my other question of why my regular headlight beams don't work, but my high beams do?? When I turn on the headlights, the voltage kinda bounces all over and the headlights don't pop up. When I click the highs on though, they go right up and work fine.....anything to do with this box perhaps?
Old May 14, 2003 | 08:22 AM
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very possible, have you moved it at all? It seems to be an extremely sensitive device, so much so that people have relocated it and suddenly had all sorts of problems with their headlights...
Old May 14, 2003 | 03:11 PM
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Never moved it, but the car was hit there. Not super hard, the tire was turned to the left and took most of the impact. The nose and fender only had to be repainted. I've been wondering if this was to blame. Is there a way to check the box?
Old May 15, 2003 | 02:21 PM
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Originally posted by Black94mula
Never moved it, but the car was hit there. Not super hard, the tire was turned to the left and took most of the impact. The nose and fender only had to be repainted. I've been wondering if this was to blame. Is there a way to check the box?
Find someone with a Firebird and swap them. Or, you could get yourself a wiring diagram and try to figure out how it works, and then trouble shoot it. Someone probably has a logic diagram for it.

I had a car that was hit in the drivers side front. The module had a small crack in the casing (just enough for moisture to get in) and after a year or two the headlights started doing wacky things.

They are actually not very expensive to replace, $300 form the factory but only $15 or so from a salvage yard. (I feel sorry for anyone how actually bought one from the factory )
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