Dimmer not lighting up Gauge Clusters - ZR-1 Net Registry Forums

aj94zr1 · 07-24-2020

My ZR-1 rolled in last night and the first thing I notice is the dimmer adjuster did not light up the gauge clusters at all.

If I moved the dimmer all the way up the house over lights come on and works, but nothing on the gauge clusters.

Any idea what it could be?

aj94zr1 · 07-24-2020

I checked the "cluster" fuse and it was working.

Looking at manual it said if the bulb for the cluster gauges was out to contact a dealer.

Let me know if any of you have experience with this. The only thing that lights up at night is my orange speed odometer and orange screen on my radio.

aj94zr1 · 07-24-2020

As shown is this attachment, nothing else is lighting up besides the orange lights and the house lights. Is there another fuse for this besides "clusters"?

Corvette95 · 07-25-2020

Ok so,you are in a dim low light garage , correct? When you turn the light switch on the left hand dash to parking light or headlights on, the entire cluster has no backlights? What about the a/c controller and radio? Do they light up? When was the last time they worked for sure with park or headlamps on? Do the exterior lights (parking etc) work? Do the headlamps pop up?

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Corvette95 · 07-25-2020

Check your CCM codes after the above and see if you have a code 74 dimmer switch. Any aftermarket alarms, radio, amp etc?

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aj94zr1 · 07-30-2020

Following up on this incase any new zr1 owners have this issue and search for it.

As mentioned, I had checked the "instrument cluster" fuse, which was not blown but the gauges were still not working.

This caused me to check every fuse before I sent it in and I found that the "tail light" fuse was blown.

Once replaced, my front gauge lights started to work.

All fixed.

07-24-2020	#1
aj94zr1 Join Date: Jul 2020 Location: Louisiana Posts: 24	Dimmer not lighting up Gauge Clusters My ZR-1 rolled in last night and the first thing I notice is the dimmer adjuster did not light up the gauge clusters at all. If I moved the dimmer all the way up the house over lights come on and works, but nothing on the gauge clusters. Any idea what it could be? __________________ [B]1994 ZR-1[/B] [COLOR=Red]Torch Red[/COLOR] [COLOR=Olive]Beige Interior[/COLOR] [I]#187[/I]

07-24-2020	#2
aj94zr1 Join Date: Jul 2020 Location: Louisiana Posts: 24	Re: Dimmer not lighting up Gauge Clusters I checked the "cluster" fuse and it was working. Looking at manual it said if the bulb for the cluster gauges was out to contact a dealer. Let me know if any of you have experience with this. The only thing that lights up at night is my orange speed odometer and orange screen on my radio. __________________ [B]1994 ZR-1[/B] [COLOR=Red]Torch Red[/COLOR] [COLOR=Olive]Beige Interior[/COLOR] [I]#187[/I]

07-25-2020	#4
Corvette95 Join Date: Jan 2006 Location: Decatur, AL Posts: 1,107	Re: Dimmer not lighting up Gauge Clusters Ok so,you are in a dim low light garage , correct? When you turn the light switch on the left hand dash to parking light or headlights on, the entire cluster has no backlights? What about the a/c controller and radio? Do they light up? When was the last time they worked for sure with park or headlamps on? Do the exterior lights (parking etc) work? Do the headlamps pop up? Sent from my iPhone using ZR-1 Net Registry __________________ Corvette95 Registry and Forum (*************) 1989 C4 Conv Wht/Gry Auto Hardtop Top Flight SOLD 1995 C4 Coupe Purple/Blk 6 Speed 1989 C4 Conv Wht/Red Auto SOLD 1996 C4 Conv Black/Tan Auto SOLD 1994 C4 Coupe Wht/Blk SOLD 1995 C4 ZR-1 White/Gry #278 Dual Dunn Head SOLD 1986 C4 Coupe Black/Red 4+3 SOLD 1990 C4 ZR-1 Red/Red #0454

07-25-2020	#5
Corvette95 Join Date: Jan 2006 Location: Decatur, AL Posts: 1,107	Dimmer not lighting up Gauge Clusters Check your CCM codes after the above and see if you have a code 74 dimmer switch. Any aftermarket alarms, radio, amp etc? Sent from my iPhone using ZR-1 Net Registry __________________ Corvette95 Registry and Forum (*************) 1989 C4 Conv Wht/Gry Auto Hardtop Top Flight SOLD 1995 C4 Coupe Purple/Blk 6 Speed 1989 C4 Conv Wht/Red Auto SOLD 1996 C4 Conv Black/Tan Auto SOLD 1994 C4 Coupe Wht/Blk SOLD 1995 C4 ZR-1 White/Gry #278 Dual Dunn Head SOLD 1986 C4 Coupe Black/Red 4+3 SOLD 1990 C4 ZR-1 Red/Red #0454

07-30-2020	#6
aj94zr1 Join Date: Jul 2020 Location: Louisiana Posts: 24	Re: Dimmer not lighting up Gauge Clusters Following up on this incase any new zr1 owners have this issue and search for it. As mentioned, I had checked the "instrument cluster" fuse, which was not blown but the gauges were still not working. This caused me to check every fuse before I sent it in and I found that the "tail light" fuse was blown. Once replaced, my front gauge lights started to work. All fixed. __________________ [B]1994 ZR-1[/B] [COLOR=Red]Torch Red[/COLOR] [COLOR=Olive]Beige Interior[/COLOR] [I]#187[/I]