Digital dash intermittent - ZR-1 Net Registry Forums

scottskill · 08-15-2017

My 91 started to encounter digital dash running intermittent with the courtesy lights not coming on during door open mode. Accomplished CCM test 8A-50-2 no faults noted when Digital Cluster was working intermittently. had digital dash overhauled due to erratic tach and lcd maintenance. Cluster and tach op's ck'd good. Accomplished Digital Cluster 8A-82-1 no faults noted. Replaced courtesy relay as a precautionary measure no help noted. Looked @ Grd Distribution 8A-14-9 for Grd 202 found that but unable to locate S230 by following 8A-114-7 flow chart #2. Problem still intermittent which results in no start condition@ times. When I can get it to start with courtesy lights working digital dash will operate for several minutes then blank, shut car off no start condition exists with courtesy lights Inop. when opening doors. Courtesy lights will operate from dash head light switch. Car does have aftermarket stereo and alarm all wiring looks good. At this point in time all suggestions welcome.

scottskill · 08-21-2017

Accomplished CCM test 8A-50-8 chart #1 bad CCM. Also removed after market alarm system. Now the fun begins locating a CCM!

-=Jeff=- · 08-21-2017

You will need to find one with close to the same miles on your car. I doubt there are any new ones out there

I just noticed you are in Maple Park, just a bit west of me

Ccmano · 08-22-2017

Quote:

Originally Posted by -=Jeff=-

You will need to find one with close to the same miles on your car. I doubt there are any new ones out there

Why is that, Jeff?
H

-=Jeff=- · 08-22-2017

Quote:

Originally Posted by Ccmano

Why is that, Jeff?
H

If he wants to keep the mileage the same.. not sure there is any place to re-manufacture them and reset miles any more.. but if the Op does not care on the mileage listed it won't matter

scottskill · 08-22-2017

Found a CCM with the same serial #'s off E-bay.

Sent from my SM-G925P using ZR-1 Net Registry mobile app

Ccmano · 08-22-2017

I thought the CCM could be reprogrammed for correct mileage with a Tech1 or2? Am I wrong?
H

-=Jeff=- · 08-22-2017

Quote:

Originally Posted by Ccmano

I thought the CCM could be reprogrammed for correct mileage with a Tech1 or2? Am I wrong?
H

It can from new within the first 100 miles. I don't know or have not heard how it is done when it is serviced. I would assume something is reset when they were remanfactured. but I don't know what that process is..

Never tried to reprogram and already programmed CCM as i don't have a tech1 or 2 and correct cartridge

scottskill · 08-22-2017

Who might have that equipment?

Sent from my SM-G925P using ZR-1 Net Registry mobile app

-=Jeff=- · 08-22-2017

a few on the forum, but that does not mean it will work. did you get a freshly serviced unit? meaning there is no mileage/No VIN in it?

or did you just buy a used part?

08-21-2017	#3
-=Jeff=- Join Date: Jul 2007 Location: Bartlett, IL Posts: 7,144	Re: Digital dash intermittent You will need to find one with close to the same miles on your car. I doubt there are any new ones out there I just noticed you are in Maple Park, just a bit west of me __________________ 1990 Corvette ZR-1 #1051 Watson Headers (2" Primary) - Borla Catback Late Model IH - Plenum Coilovers - 4.10s Custom Interior NCM Lifetime Member #978

08-22-2017	#6
scottskill Join Date: Aug 2014 Location: Maple Park, Il. Posts: 54	Re: Digital dash intermittent Found a CCM with the same serial #'s off E-bay. Sent from my SM-G925P using ZR-1 Net Registry mobile app

08-22-2017	#7
Ccmano Join Date: Jun 2006 Location: Sparks, NV Posts: 2,852	Re: Digital dash intermittent I thought the CCM could be reprogrammed for correct mileage with a Tech1 or2? Am I wrong? H __________________ 90'ZR-1 #1461 Red/Black Ported Intake, Degreed Cams, OBX Headers & Exhaust, Fidanza FW, Secondary Delete, Custom tune, C6 GS Wheels. Sold 08 C6 Z51 Crystal Red Metallic Sold Vararam Intake, Tune, Sold 05 C6 Z51 Red/Black Sold 90'ZR-1 #1723 Black/Gray Sold but not forgotten 91' Z51 L98 White Vert. My First, you always remember your first. Sold.

08-22-2017	#9
scottskill Join Date: Aug 2014 Location: Maple Park, Il. Posts: 54	Re: Digital dash intermittent Who might have that equipment? Sent from my SM-G925P using ZR-1 Net Registry mobile app

08-22-2017	#10
-=Jeff=- Join Date: Jul 2007 Location: Bartlett, IL Posts: 7,144	Re: Digital dash intermittent a few on the forum, but that does not mean it will work. did you get a freshly serviced unit? meaning there is no mileage/No VIN in it? or did you just buy a used part? __________________ 1990 Corvette ZR-1 #1051 Watson Headers (2" Primary) - Borla Catback Late Model IH - Plenum Coilovers - 4.10s Custom Interior NCM Lifetime Member #978

08-15-2017	#1
scottskill Join Date: Aug 2014 Location: Maple Park, Il. Posts: 54	Digital dash intermittent My 91 started to encounter digital dash running intermittent with the courtesy lights not coming on during door open mode. Accomplished CCM test 8A-50-2 no faults noted when Digital Cluster was working intermittently. had digital dash overhauled due to erratic tach and lcd maintenance. Cluster and tach op's ck'd good. Accomplished Digital Cluster 8A-82-1 no faults noted. Replaced courtesy relay as a precautionary measure no help noted. Looked @ Grd Distribution 8A-14-9 for Grd 202 found that but unable to locate S230 by following 8A-114-7 flow chart #2. Problem still intermittent which results in no start condition@ times. When I can get it to start with courtesy lights working digital dash will operate for several minutes then blank, shut car off no start condition exists with courtesy lights Inop. when opening doors. Courtesy lights will operate from dash head light switch. Car does have aftermarket stereo and alarm all wiring looks good. At this point in time all suggestions welcome.

08-21-2017	#2
scottskill Join Date: Aug 2014 Location: Maple Park, Il. Posts: 54	Re: Digital dash intermittent Accomplished CCM test 8A-50-8 chart #1 bad CCM. Also removed after market alarm system. Now the fun begins locating a CCM!