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Old 07-08-2022   #11
chris90
 
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Join Date: May 2021
Location: france
Posts: 16
Default Re: Wiring a shift light

Quote:
Originally Posted by JT ZR-Won View Post
Looks like the previous owner did a pretty clean install. Pretty cool
I'll restart it, but I don't have the wiring anymore and I don't know what to do yet.
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Old 06-26-2023   #12
JT ZR-Won
 
Join Date: Aug 2021
Location: Bradenton, FL
Posts: 133
Default Re: Wiring a shift light

Ok, so this small project got put on hold for a while but it is now finished. I wanted to update this thread with some photos because when it comes to this stuff, I'm much more of a visual person and this might help someone else out.

REMINDER: This install is on a 1990 and I'm not certain if it is the same on other years.

I located the C100 Terminal in the footwell. There was no need for me to feed any wires through the firewall. I took the best photos I could as you're pretty much twisted up like a pretzel at this point. It is directly to the left of the clutch pedal.

I located the white tach wire that leads to the instrument cluster. This was located in the E1 slot (I believe it was E1... it is the only white wire I saw) on my '90. The slots are actually labeled, but they are labeled super tiny but I could see them with a flash light. I spliced into the white tach wire and connected the green tach wire from my auto meter.

I then grounded the shift light underneath the instrument cluster right next to the radio. I don't use the cigarette lighter so I ran the shift light power to it. The autometer control module just sits inside the center console. It came with double sided tape but it really cannot move. Everything works perfectly and I hope this helps someone else.

Cheers!

Jay
Attached Images
File Type: jpg footwell-c100.jpg (149.3 KB, 16 views)
File Type: jpg c-100-wire colors.jpg (172.2 KB, 18 views)
File Type: jpg c100 cut white wire.jpg (146.4 KB, 15 views)
File Type: jpg white-with-green.jpg (200.9 KB, 19 views)
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Old 06-26-2023   #13
JT ZR-Won
 
Join Date: Aug 2021
Location: Bradenton, FL
Posts: 133
Default Re: Wiring a shift light

I chose to mount this above the dash so it can be seen. It is a pretty small light and looks pretty cool.
Attached Images
File Type: jpg ground.jpg (296.9 KB, 16 views)
File Type: jpg cig-lighter.jpg (202.5 KB, 17 views)
File Type: jpg 6800.jpg (223.4 KB, 21 views)
File Type: jpg dashmount-1.jpg (193.5 KB, 17 views)
File Type: jpg dashmount-2.jpg (185.9 KB, 17 views)
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Old 06-26-2023   #14
XfireZ51
 
Join Date: May 2007
Location: Chicagoland, IL
Posts: 9,661
Default Re: Wiring a shift light

No splicing necessary if u use the diag connector for the Ignition Module by the firewall.
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Old 06-26-2023   #15
aafc
 
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Location: Ochlocknee, GA
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Default Re: Wiring a shift light

Interesting , I had a shift light that mounted to my autometer tach. Then I
removed the 6-speed transmission back in 2009.
Well I do not need a shift lite as the transmission controller is set to shift at what ever I want. Setting the controller to 7000 rpm shift at the races the car would loose power at the shift point. After two runs I realized that I was hitting
the fuel cutoff. Dummy , so I set shift at WOT to 6800 rpm and no more shutting down at full throttle runs. Just to show that you should pay attention
to what you are during . You know measure twice ,cut once.
JOHN
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Old 06-26-2023   #16
XfireZ51
 
Join Date: May 2007
Location: Chicagoland, IL
Posts: 9,661
Default Re: Wiring a shift light

Quote:
Originally Posted by aafc View Post
Interesting , I had a shift light that mounted to my autometer tach. Then I
removed the 6-speed transmission back in 2009.
Well I do not need a shift lite as the transmission controller is set to shift at what ever I want. Setting the controller to 7000 rpm shift at the races the car would loose power at the shift point. After two runs I realized that I was hitting
the fuel cutoff. Dummy , so I set shift at WOT to 6800 rpm and no more shutting down at full throttle runs. Just to show that you should pay attention
to what you are during . You know measure twice ,cut once.
JOHN
Fuel cutoff/ turn on can be modified via calibration.
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Former ZR-1 Registry - BOD
1972 Corvette 4speed base Coupe SOLD long time ago
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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Old 06-26-2023   #17
aafc
 
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Location: Ochlocknee, GA
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Default Re: Wiring a shift light

The fuel cut off limit has been fixed to higher limit. This is not something you
could do at the drag strip unless you have right the equipment.
This happened about 4-5 years ago. IT seems that the tune works good by
auto shift at 6800 rpm having run consist mid 11's all day long.
John
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