upshift light on auto
Thread Starter
Race Director
Joined: Sep 2003
Posts: 16,836
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From: Database Error Indiana
upshift light on auto
Ie tried to make this light come on for 6 years. Thought the bulb was fried. Now @ 1800 rpm, 48mph steady cruise it comes on. What triggers it? Vacuum signal? speed sensor? Wish I had the bugs out of this new combo.
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From: Almost all Skyline Cruises Vettes at Waterside 1-5
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Re: upshift light on auto (Spankyellow)
:cheers: Can't wait to see the responses you get! I think, empasis on I THINK, I saw mine come on once at 4000+ rpm in second gear (auto also)
:seeya
:steering:
:seeya
:steering:
Race Director
Joined: Dec 1999
Posts: 11,182
Likes: 2
From: Almost all Skyline Cruises Vettes at Waterside 1-5
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Re: upshift light on auto (HapAFcop)
:cheers: As I said..."I think I saw it come on once"...Then again I think I saw Madonna trying to flag me down :D :D
Still interested in responses to this post....just in case
:seeya
:steering:
Still interested in responses to this post....just in case
:seeya
:steering:
Safety Car
Joined: Aug 1999
Posts: 4,931
Likes: 3
From: Fort Lauderdale FL
Re: upshift light on auto (Spankyellow)
Mine comes on also when I stay at a steady speed on the hightway and forget to put the car in overdrive. It comes on when I stay around 45 to 55 mph for a certain period of time. It's supposed to tell you to shift for better economy. Mine works as far as I know :yesnod:
Thread Starter
Race Director
Joined: Sep 2003
Posts: 16,836
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From: Database Error Indiana
Re: upshift light on auto (bccorvette85)
BC85, Whats up? Been working on this car for 2 weeks. Cam, heads, Intake. What a pain. Drove it to work today,first time. Still got bugs to work out..A real pain. Whats going on at your end ? Ready to drag race?? :chevy
At least Im not the only one wondering about this. I seriously thought the bulb was fried. Now the cars not running right I can make it come on at will. Does anyone really know how it works?
[Modified by Spankyellow, 8:03 PM 1/12/2004]
At least Im not the only one wondering about this. I seriously thought the bulb was fried. Now the cars not running right I can make it come on at will. Does anyone really know how it works?
[Modified by Spankyellow, 8:03 PM 1/12/2004]
Safety Car
Joined: Aug 2002
Posts: 4,812
Likes: 1
From: New Albany IN
St. Jude Donor '03-'04-'06-'08-'09
Re: upshift light on auto (Spankyellow)
MIne used to come on all the time after I rebuilt the tranny. It wouldn't shift into OD until I re-adjusted the TV cable. Now I can't get it to come on.
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Team Owner
Joined: May 2001
Posts: 36,077
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From: ...tearing up the highways, one state at a time™®©
Re: upshift light on auto (Spankyellow)
the only time my upshift light came on, on my automatic, was when my ECM was fried :eek:
It should NOT come on :nonod:
It should NOT come on :nonod:
Le Mans Master
Joined: Jul 2002
Posts: 5,818
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From: Alive and well in Burlington NC
Re: upshift light on auto (*89x2*)
Quote from the 91 owners manual -
"This light will come on approximately one minute after you reach crusing speed to remind you when to shift into 6 (Sixth) gear for a manual transmission and [D] (Automatic Overdrive) for an automatic transmission".
"This light will come on approximately one minute after you reach crusing speed to remind you when to shift into 6 (Sixth) gear for a manual transmission and [D] (Automatic Overdrive) for an automatic transmission".
Le Mans Master
Joined: Dec 2000
Posts: 7,839
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From: San Diego, Ca
Re: upshift light on auto (Spankyellow)
Disabled at least for the '89 auto. I believe all of the digital clusters have the light (since the only differences are between cruise and non-cruise cars. Signal is sent on the serial data line (same that carries the average fuel and range info) from the ECM to the cluster. Hard to find any info about it - Killebrew barely mentions it in his cluster repair manual and I couldn't find anything in Helms. Usually, if the serial data line is whacked, you won't get the fuel info or a check engine light. Later vehicles, such as my '97 S10, use a driver circuit to ground the light instead of the serial data line to illuminate it, so analog clusters may have a different control. However, if it's not working and it's suppose to, suspect the cluster or PROM (assuming the fuel info is being displayed and it's got a check engine light).
Pro
Joined: Aug 2002
Posts: 715
Likes: 0
From: Warner Robins GA
Re: upshift light on auto (Spankyellow)
Mine will come on when I'm going up a hill between 40-50 mph. There's one hill around here that it always comes on at the same spot near the top. As soon as I change my speed at all or clear the crest of the hill, the light will go away.
Melting Slicks
Joined: May 2001
Posts: 2,700
Likes: 3
From: Lebanon KY
Re: upshift light on auto (Spankyellow)
i have an 86 A4, and mine comes on all the time in D and OD except for when the lock up torque convertor is engaged. otherwise if i'm cruising at 50+ in D it'll come on, or if i'm traveling at any speed constantly in OD :crazy: i hate it
Thread Starter
Race Director
Joined: Sep 2003
Posts: 16,836
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From: Database Error Indiana
Re: upshift light on auto (SunCr)
SunCr, this makes sense now. I had the scan cable attached when it came on and gages behaved as you described. You definitley know your stuff. :thumbs:
