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Old 03-21-2024   #1
We Gone
 
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Default Low level LCD Display 90s

In the latest HOB Marc has a write up about adding a 22k Ohm resister to help low lighting on the 90's .



Can a 91 set-up be used in replacement of the 90 to resolve this?
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Old 03-21-2024   #2
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Default Re: Low level LCD Display 90s

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Originally Posted by We Gone View Post
In the latest HOB Marc has a write up about adding a 22k Ohm resister to help low lighting on the 90's .



Can a 91 set-up be used in replacement of the 90 to resolve this?
only by swapping in a 1991 CCM. I did that on my 1990
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Old 03-22-2024   #3
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Default Re: Low level LCD Display 90s

Did you do everything or only the gauges button and DIC section? as this this the section with the light sensor.
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1990 Steel Blue/Black #2355
1990 Red/Red #1473
1991 Quasar /Black #118 Sold
1991 Turquoise/Black #766 Parted Out
1993 Yellow/White #179 Sold
1990 Black/Gray #1361 Headers/4:10s Sold
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Old 03-22-2024   #4
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Default Re: Low level LCD Display 90s

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Originally Posted by We Gone View Post
Did you do everything or only the gauges button and DIC section? as this this the section with the light sensor.
You only need the CCM (and get it reprogrammed to match your car. That takes care of everything. The added digital gauges did not start until 92
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1990 Corvette ZR-1 #1051
Watson Headers (2" Primary) - Flowmaster Cats - Borla Catback
Late Model IH - Plenum
Coilovers - 4.10s
Custom Interior
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Old 03-22-2024   #5
We Gone
 
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Default Re: Low level LCD Display 90s

Jeff I think your miss-understanding what I'm asking. HOB issue -64 page 35 Marc H has a write up on adding a 22k Ohm resistor to increase the low level display lighting on the 90. In the 91 this issue was fixed. I just wondered if the section that has the switches and DIC could be interchanged 90 to a 91? to resolve the low level lighting vs soldering in a resistor?
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1990 Steel Blue/Black #2355
1990 Red/Red #1473
1991 Quasar /Black #118 Sold
1991 Turquoise/Black #766 Parted Out
1993 Yellow/White #179 Sold
1990 Black/Gray #1361 Headers/4:10s Sold
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Old 03-22-2024   #6
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Default Re: Low level LCD Display 90s

90 and 91 switches are the same, circuits are the same. The change is in the CCM form the OEM standpoint. The resistor changes the voltage to act like the later years. So using a 91 switch assembly in the 90 will make no difference. Either way you need the resistor mod, in the case
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1990 Corvette ZR-1 #1051
Watson Headers (2" Primary) - Flowmaster Cats - Borla Catback
Late Model IH - Plenum
Coilovers - 4.10s
Custom Interior
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Old 03-23-2024   #7
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Default Re: Low level LCD Display 90s

Jeff,

Have u been able to switch LED display contrast to white on black?
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Old 03-23-2024   #8
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Default Re: Low level LCD Display 90s

Thanks Jeff.
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1990 Steel Blue/Black #2355
1990 Red/Red #1473
1991 Quasar /Black #118 Sold
1991 Turquoise/Black #766 Parted Out
1993 Yellow/White #179 Sold
1990 Black/Gray #1361 Headers/4:10s Sold
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Old 03-23-2024   #9
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Default Re: Low level LCD Display 90s

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Originally Posted by XfireZ51 View Post
Jeff,

Have u been able to switch LED display contrast to white on black?
Which LED display?
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1990 Corvette ZR-1 #1051
Watson Headers (2" Primary) - Flowmaster Cats - Borla Catback
Late Model IH - Plenum
Coilovers - 4.10s
Custom Interior
NCM Lifetime Member #978
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Old 03-23-2024   #10
XfireZ51
 
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Default Re: Low level LCD Display 90s

Center. Speedo/Fuel
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Former ZR-1 Registry - BOD
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1984 Corvette Z-51/4+3 SOLD
1992 Corvette ZR-1 Aqua/Gray #474 SOLD
1992 Corvette ZR-1 Black Rose/Cognac #458
2014 Honda VFR Interceptor DX
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