Express-Down feature
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1994 LT1 1996 LT4
Joined: Sep 2024
Posts: 780
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From: East Front Range Colorado
Express-Down feature
It seems the driver side "Express-Down" feature does not work on my '94 LT1. Otherwise the window works well. Is this likely due to a dirty contact? Typically with this feature on other cars, there's the initial nudge of the switch that lets the driver regulate the opening and an additional nudge activates "Express-Down." Does the factory switch have this feel?
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Thread Starter
1994 LT1 1996 LT4
Joined: Sep 2024
Posts: 780
Likes: 734
From: East Front Range Colorado
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The switch is the same electrically as the non-express down years' switch, so if the window works, it isn't the switch. I suspect that the express down module has a relay in it, and after decades of inactivity, the relay is stuck. The FSM does not show the internal circuitry of the module, I'm only guessing.
Diz: AFAIK, the express down didn't begin until 1994, and perhaps not until 95, which I know has express down, but I'm not certain that 94 does. 93 does not.
Diz: AFAIK, the express down didn't begin until 1994, and perhaps not until 95, which I know has express down, but I'm not certain that 94 does. 93 does not.
Last edited by IHBD; Feb 7, 2025 at 02:42 AM.
Thread Starter
1994 LT1 1996 LT4
Joined: Sep 2024
Posts: 780
Likes: 734
From: East Front Range Colorado
The switch is the same electrically as the non-express down years' switch, so if the window works, it isn't the switch. I suspect that the express down module has a relay in it, and after decades of inactivity, the relay is stuck. The FSM does not show the internal circuitry of the module, I'm only guessing.
Diz: AFAIK, the express down didn't begin until 1994, and perhaps not until 95, which I know has express down, but I'm not certain that 94 does. 93 does not.
Diz: AFAIK, the express down didn't begin until 1994, and perhaps not until 95, which I know has express down, but I'm not certain that 94 does. 93 does not.
