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Old Oct 4, 2006 | 07:38 PM
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Default shift light
I have A th350 trans and want to hook up A shift light.Where and how do I do it or can it be done?
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Old Oct 4, 2006 | 07:45 PM
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there is an electrical section on site... may have better help and respone there... im not quite the wiz... sorry
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Old Oct 4, 2006 | 07:54 PM
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You hook the shiftlight up to the tach wire coming from your PCM.
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Old Oct 4, 2006 | 07:58 PM
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Originally Posted by rollinna65
You hook the shiftlight up to the tach wire coming from your PCM.
ok what wire is that?? I have no clue
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Old Oct 4, 2006 | 08:00 PM
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you need a seperate wire that connects from your tach to the pcm
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Old Oct 4, 2006 | 08:02 PM
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i am using the stock tach
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Old Oct 4, 2006 | 08:05 PM
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What kind of shift light and try in the right section and look at installUs write up.
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Old Oct 4, 2006 | 08:12 PM
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Originally Posted by Agt. Orange
ok what wire is that?? I have no clue
I can't remember exactly which one it is but if you go to installuniversity.com they have a really good write up on it. Basically you find the tach wire coming off your pcm, use a wiretap(blue plastic thing) to get a signal and then run that wire through the firewall and up to the shiftlight. Then just hook up your positive and ground to the shiftlight, set the light and go test it out. I love mine, no more watching the slow as tach and accidentally bumping the limiter.
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Old Oct 4, 2006 | 11:04 PM
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go to raptorperformance.com or look at my sig below and look at page 4 there should be everything you need including PCM pinouts which you should be able to find on here. i HIGHLY recommened the shiftlight that Raptor Performance makes. Some of the sponsers here sell thier product, absolutly great
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Old Oct 4, 2006 | 11:17 PM
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Two different threads that will help you.

https://ls1tech.com/forums/showpost....14&postcount=3

https://ls1tech.com/forums/wiring-stereo-electronics/496034-installing-raptor-shift-light-ls1-f-body.html


3 wire hookup. + , - , and Pin #10 right out of the lower (red) connector on the PCM. It's a white wire that will be tapped and go to the tach signal on your tach/shift light.



Since you have a 99 PCM, pin #10 will be the one you tap. It's a WHITE WIRE.
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Old Oct 4, 2006 | 11:28 PM
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can I use any shift light?
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Old Oct 4, 2006 | 11:58 PM
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Originally Posted by Agt. Orange
can I use any shift light?
Yes. Harlan, Raptor, AutoMeter, Summit. Whatever you want. All will have a 3 wire hook up. Red +, Black - and Green = Tach lead. If you get a actual 3 3/8 to 5" tach, which I hope you don't, it will have a 4 wire hookup. It should be a white wire I believe for illumination.
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Old Oct 5, 2006 | 03:00 PM
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RAPTOR!!!!!!!!!!!!!!!!! and never look back
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