89 c4 automatic shift light on dash
Thread Starter
Joined: Jun 2007
Posts: 4
From:
89 c4 automatic shift light on dash
Ihave a 89 auto vette, and i noticed it has a shift up light on the dash, but it has never worked. I noticed when i plugged in the scanner it lights up, so i know that the bulb works. I have a friend that has a manuel car that will light up when it's time to shift. Does the automatic's have this too, or it just a universal dash? If it does come in automatic's, does anyone know why it could possibly be not working?[/align]
Joined: Oct 2006
Posts: 924
From:
RE: 89 c4 automatic shift light on dash
I dont understand why there is a shiftlight on the automatics. Im guesing like you that its universal. Mine blinks on then it changes gears automatically. I wish someone knew the answer because I am very interested in this quiestion as well. Doesn't make any sense to me...Hmm.
Senior Member
Joined: May 2007
Posts: 1,567
From: eastern NC
RE: 89 c4 automatic shift light on dash
ORIGINAL: c4383
Ihave a 89 auto vette, and i noticed it has a shift up light on the dash, but it has never worked. I noticed when i plugged in the scanner it lights up, so i know that the bulb works. I have a friend that has a manuel car that will light up when it's time to shift. Does the automatic's have this too, or it just a universal dash? If it does come in automatic's, does anyone know why it could possibly be not working?[/align]
Ihave a 89 auto vette, and i noticed it has a shift up light on the dash, but it has never worked. I noticed when i plugged in the scanner it lights up, so i know that the bulb works. I have a friend that has a manuel car that will light up when it's time to shift. Does the automatic's have this too, or it just a universal dash? If it does come in automatic's, does anyone know why it could possibly be not working?[/align]
Senior Member
Joined: May 2007
Posts: 1,567
From: eastern NC
RE: 89 c4 automatic shift light on dash
ORIGINAL: c4383
it's an automatic car from the factory. It will say something like shift up from 4th... i was just wondering what activates it, cause it is a different light than a 4 speed
it's an automatic car from the factory. It will say something like shift up from 4th... i was just wondering what activates it, cause it is a different light than a 4 speed
So you DO have aftermarket drive train/ECM. That's what I thought.
Can you explain again exactly what you've got - your signature line info just shed a few more clouds on the darkness.[sm=smiley22.gif][sm=repost.gif][sm=icon_beat.gif][sm=dontgetit.gif][sm=chairshot.gif]
Thread Starter
Joined: Jun 2007
Posts: 4
From:
RE: 89 c4 automatic shift light on dash
ORIGINAL: cwb
So you DO have aftermarket drive train/ECM. That's what I thought.
Can you explain again exactly what you've got - your signature line info just shed a few more clouds on the darkness.[sm=smiley22.gif][sm=repost.gif][sm=icon_beat.gif][sm=dontgetit.gif][sm=chairshot.gif]
ORIGINAL: c4383
it's an automatic car from the factory. It will say something like shift up from 4th... i was just wondering what activates it, cause it is a different light than a 4 speed
it's an automatic car from the factory. It will say something like shift up from 4th... i was just wondering what activates it, cause it is a different light than a 4 speed
So you DO have aftermarket drive train/ECM. That's what I thought.
Can you explain again exactly what you've got - your signature line info just shed a few more clouds on the darkness.[sm=smiley22.gif][sm=repost.gif][sm=icon_beat.gif][sm=dontgetit.gif][sm=chairshot.gif]
Joined: Oct 2006
Posts: 84
From:
RE: 89 c4 automatic shift light on dash
If you have a automatic, like mine, it will come on if you leave your car in Drive instead of Overdrive for an extended period and the computer deems it not necessary. Mine will come if I leave my car in Drive if I am on the interstate. The next time you are on the highway or somewhere where you can maintain 55 or 60 mph leave it in drive, the light should come on. It is there to remind you that you are not getting the best gas mileage that you could be getting. I remember on my Dad's 88' Z51 car it did the same thing, and it was aautomatic.
Senior Member
Joined: May 2007
Posts: 1,567
From: eastern NC
RE: 89 c4 automatic shift light on dash
ORIGINAL: red90vettesc
If you have a automatic, like mine, it will come on if you leave your car in Drive instead of Overdrive for an extended period and the computer deems it not necessary. Mine will come if I leave my car in Drive if I am on the interstate. The next time you are on the highway or somewhere where you can maintain 55 or 60 mph leave it in drive, the light should come on. It is there to remind you that you are not getting the best gas mileage that you could be getting. I remember on my Dad's 88' Z51 car it did the same thing, and it was aautomatic.
If you have a automatic, like mine, it will come on if you leave your car in Drive instead of Overdrive for an extended period and the computer deems it not necessary. Mine will come if I leave my car in Drive if I am on the interstate. The next time you are on the highway or somewhere where you can maintain 55 or 60 mph leave it in drive, the light should come on. It is there to remind you that you are not getting the best gas mileage that you could be getting. I remember on my Dad's 88' Z51 car it did the same thing, and it was aautomatic.
What throws me is he says he's got a '98 motor (LS1?), and the original computer...
Joined: Oct 2006
Posts: 84
From:
RE: 89 c4 automatic shift light on dash
I think that there is a possibility that the CCM not the ECM trips the light, would be interesting to know which one causes the light to come on. Maybe Mech will read this thread and tell us. I didn't read anywhere above about the LS1 part. I would love to have one in my car though!!!
