Dim Dash LCD Speed Display - ZR-1 Net Registry Forums

mike100 · 03-14-2012

Is it the backlight? try turning on your headlamps and adjusting the dimmer lever to maximum brightness.

seems like my 95 LT1 car dimmer function used to work all the time regardless of headlamp function, but the early ones need the lamps on for the dimmer to adjust. they even made the gauge ink white instead of dark yellow on the 94-up cars...obviously these were a little challenging to see even new.

Paul Workman · 03-14-2012

If stepping on the brake causes change in the luminance, "grounding" is the first thing that comes to mind. The FSM should help. But, in the mean time, the two circuit ground reference points are on the back of the block at the edge of the bell housing, each right/left bolt is about 6 inches either side of top-center of the periphery. There are 4 lugs on one bolt, and 5 lugs on the other.

As for the connectors on the instrument cluster, there are two; the main one at the corner of the board, and the other is at the top, which serves the LCD pannel. Both connectors can be and should be replaced, if there is any sign of "frosting" (whiteish oxidation) on the pins. (I ran across those connectors a few times when I was searching for parts for the board. I'll see if I can dig them up again.)

P.

03-14-2012	#1
mike100 Join Date: Feb 2011 Location: San Marcos CA Posts: 1,786	Re: Dim Dash LCD Speed Display Is it the backlight? try turning on your headlamps and adjusting the dimmer lever to maximum brightness. seems like my 95 LT1 car dimmer function used to work all the time regardless of headlamp function, but the early ones need the lamps on for the dimmer to adjust. they even made the gauge ink white instead of dark yellow on the 94-up cars...obviously these were a little challenging to see even new.

03-14-2012	#2
Paul Workman Join Date: Nov 2007 Location: Squires (near Ava MO in the Mark Twain N'tl Forest) - Missouri Posts: 6,466	Re: Dim Dash LCD Speed Display If stepping on the brake causes change in the luminance, "grounding" is the first thing that comes to mind. The FSM should help. But, in the mean time, the two circuit ground reference points are on the back of the block at the edge of the bell housing, each right/left bolt is about 6 inches either side of top-center of the periphery. There are 4 lugs on one bolt, and 5 lugs on the other. As for the connectors on the instrument cluster, there are two; the main one at the corner of the board, and the other is at the top, which serves the LCD pannel. Both connectors can be and should be replaced, if there is any sign of "frosting" (whiteish oxidation) on the pins. (I ran across those connectors a few times when I was searching for parts for the board. I'll see if I can dig them up again.) P.