Dim Dash LCD Speed Display Help
Thread Starter
Intermediate
Joined: Jul 2011
Posts: 36
Likes: 0
From: Baltimore MD
Dim Dash LCD Speed Display Help
Has anyone else had an issue with the LCD Speed/Gas gauge display being very dim and light gray vs. sharp dark black digits? My ZR1 has only 4,500 miles and was like this when I bought it. I wonder if there is corrosion on the pins on the back of instruments vs. grounds making bad contact.
Where are the grounds for the instruments located and how do you access them to clean them? I notice that the LCD backlight dims when I press on the brake pedal at idle.
I read about someone who just cleaned the pins on the back of the instrument pane with alcohol and the connector and the display is now dark uniform black. Any sage input or solutions before I proceed to remove the instruments is appreciated?
Where are the grounds for the instruments located and how do you access them to clean them? I notice that the LCD backlight dims when I press on the brake pedal at idle.
I read about someone who just cleaned the pins on the back of the instrument pane with alcohol and the connector and the display is now dark uniform black. Any sage input or solutions before I proceed to remove the instruments is appreciated?
Melting Slicks
Joined: Feb 2008
Posts: 3,286
Likes: 6
From: Palm Beach
Le Mans Master
Joined: Jul 2007
Posts: 5,043
Likes: 8
From: Tampa Florida
The turn signals might dim the clusters back lighting but the brake lights shouldn't. Check the brake light's sockets and ground locations.
The LCDs for the 90 - 96 cluster are pretty much the inverse of how the backlight is allowed to flow through the digital crystal segments of the 84-89 lcd panels. So the LCD panel on your year won't look "black" with the car "off"...which is normal.
When the digits aren't as sharp/dark as they should be usually it is because the lcd panel has been over exposed to UV light. UV over exposure is not as much of a problem in the 90-96 cluster as the LCD is better "shaded" by design.
I really don't see someone parking a ZR1 with only 4.5 K miles in the sun for all those years but you never know.
The LCDs for the 90 - 96 cluster are pretty much the inverse of how the backlight is allowed to flow through the digital crystal segments of the 84-89 lcd panels. So the LCD panel on your year won't look "black" with the car "off"...which is normal.
When the digits aren't as sharp/dark as they should be usually it is because the lcd panel has been over exposed to UV light. UV over exposure is not as much of a problem in the 90-96 cluster as the LCD is better "shaded" by design.
I really don't see someone parking a ZR1 with only 4.5 K miles in the sun for all those years but you never know.
Instructor
Joined: Jul 2010
Posts: 129
Likes: 2
From: Delete Delete
Has anyone else had an issue with the LCD Speed/Gas gauge display being very dim and light gray vs. sharp dark black digits? My ZR1 has only 4,500 miles and was like this when I bought it. I wonder if there is corrosion on the pins on the back of instruments vs. grounds making bad contact.
Where are the grounds for the instruments located and how do you access them to clean them? I notice that the LCD backlight dims when I press on the brake pedal at idle.
I read about someone who just cleaned the pins on the back of the instrument pane with alcohol and the connector and the display is now dark uniform black. Any sage input or solutions before I proceed to remove the instruments is appreciated?
Where are the grounds for the instruments located and how do you access them to clean them? I notice that the LCD backlight dims when I press on the brake pedal at idle.
I read about someone who just cleaned the pins on the back of the instrument pane with alcohol and the connector and the display is now dark uniform black. Any sage input or solutions before I proceed to remove the instruments is appreciated?
Racer
Joined: Aug 2011
Posts: 494
Likes: 138
From: Chesapeake, VA
There is a small ground on the frame rail drivers side near the crash sensor that may have something to do with this. Actually there are 2 grounds right there I black wire and the woven ground dtrap from the engine. Great location to get dripped on by brake master cyl and so on.
- Also the cluster ground is behind carpet drivers left footwell about the same height as the bottom of the lower dash but you must remove the door sill cover to get to it.
- Also the cluster ground is behind carpet drivers left footwell about the same height as the bottom of the lower dash but you must remove the door sill cover to get to it.
