factory upshift lamp
#1
TGO Supporter/Moderator
Thread Starter
iTrader: (12)
Join Date: Jul 1999
Location: SALEM, NH
Posts: 11,723
Likes: 0
Received 89 Likes
on
75 Posts
Car: '88 Formula, '94 Corvette, '95 Bird
Engine: LC9, 355" LT1, LT1
Transmission: T5, Zf6, 4L60E
Axle/Gears: 3.42, Dana44 3.45, 3.23
factory upshift lamp
I can't find a schematic for this.
The factory 'upshift' lamp, which wire is it under the dash, and is the trigger a ground or +12 ?
My ECM harness is for an auto car, so I need to splice it to the correct wire under the dash for the ECM to control the shift lamp.
-- Joe
The factory 'upshift' lamp, which wire is it under the dash, and is the trigger a ground or +12 ?
My ECM harness is for an auto car, so I need to splice it to the correct wire under the dash for the ECM to control the shift lamp.
-- Joe
#2
Supreme Member
iTrader: (11)
Join Date: Sep 1999
Location: NJ
Posts: 4,345
Received 298 Likes
on
234 Posts
Car: 92 Firebird
Engine: 4.8 LR4
Transmission: T56
Axle/Gears: 3.45 9 Bolt
Re: factory upshift lamp
I believe the ECM pulls the pin low, so the bulb has +12 ignition on the other side, I don't know the wire offhand
#4
TGO Supporter/Moderator
Thread Starter
iTrader: (12)
Join Date: Jul 1999
Location: SALEM, NH
Posts: 11,723
Likes: 0
Received 89 Likes
on
75 Posts
Car: '88 Formula, '94 Corvette, '95 Bird
Engine: LC9, 355" LT1, LT1
Transmission: T5, Zf6, 4L60E
Axle/Gears: 3.42, Dana44 3.45, 3.23
Re: factory upshift lamp
I know it's passed through to the ECM on the ECM connector if a manual car, but I suspect on an automatic harness it goes direct to the TCC plug.
I'm guessing the small connector that connects the ECM harness to the dash harness is where the shift lamp wire is. That is where I need to locate it, to splice it to the ECM connector as I'm using an automatic ECM harness, not a manual one.
Do you know off hand which pin / wire color on that connector is it?
-- Joe
I'm guessing the small connector that connects the ECM harness to the dash harness is where the shift lamp wire is. That is where I need to locate it, to splice it to the ECM connector as I'm using an automatic ECM harness, not a manual one.
Do you know off hand which pin / wire color on that connector is it?
-- Joe
#5
Sponsor
iTrader: (92)
Re: factory upshift lamp
It’s shows tan/blk and pin h but that would only apply to 90-92
I think the pin placement is different in the older cluster.
http://www.austinthirdgen.org/mkport...ter_pinout.jpg
Pin7 for 86-89 I believe
https://www.thirdgen.org/forums/elec...l#&gid=1&pid=1
Looks like John from ri might have it from a fsm
https://www.thirdgen.org/forums/elec...er-pinout.html
I think the pin placement is different in the older cluster.
http://www.austinthirdgen.org/mkport...ter_pinout.jpg
Pin7 for 86-89 I believe
https://www.thirdgen.org/forums/elec...l#&gid=1&pid=1
Looks like John from ri might have it from a fsm
https://www.thirdgen.org/forums/elec...er-pinout.html
Last edited by Tuned Performance; 07-12-2018 at 01:11 PM.
#7
TGO Supporter/Moderator
Thread Starter
iTrader: (12)
Join Date: Jul 1999
Location: SALEM, NH
Posts: 11,723
Likes: 0
Received 89 Likes
on
75 Posts
Car: '88 Formula, '94 Corvette, '95 Bird
Engine: LC9, 355" LT1, LT1
Transmission: T5, Zf6, 4L60E
Axle/Gears: 3.42, Dana44 3.45, 3.23
Re: factory upshift lamp
Trending Topics
#9
TGO Supporter/Moderator
Thread Starter
iTrader: (12)
Join Date: Jul 1999
Location: SALEM, NH
Posts: 11,723
Likes: 0
Received 89 Likes
on
75 Posts
Car: '88 Formula, '94 Corvette, '95 Bird
Engine: LC9, 355" LT1, LT1
Transmission: T5, Zf6, 4L60E
Axle/Gears: 3.42, Dana44 3.45, 3.23
Re: factory upshift lamp
I'm using an aftermarket ECM, so I was more questioning the wiring not the factory ECM logic.
What ECM and bin are you using?
-- Joe
#11
Supreme Member
iTrader: (7)
Join Date: Mar 2000
Location: Orange, CA
Posts: 5,674
Likes: 0
Received 106 Likes
on
65 Posts
Car: '90 Trans Am-12.45@110.71
Engine: 355 w/AFR 195's Elem. 400/430 HP/TQ
Transmission: Tremec T-56
Axle/Gears: 12 Bolt 3.73
Re: factory upshift lamp
You need another pin (with wire) to put in the slot (pin 10) where it goes.then add a bulb, the printed circuit is already there. Then run the wire to the ECM
Last edited by Dyno Don; 09-04-2018 at 11:18 AM.
#12
TGO Supporter/Moderator
Thread Starter
iTrader: (12)
Join Date: Jul 1999
Location: SALEM, NH
Posts: 11,723
Likes: 0
Received 89 Likes
on
75 Posts
Car: '88 Formula, '94 Corvette, '95 Bird
Engine: LC9, 355" LT1, LT1
Transmission: T5, Zf6, 4L60E
Axle/Gears: 3.42, Dana44 3.45, 3.23
Re: factory upshift lamp
So.. My dash wiring is for a 5 speed car, but I did have to put a bulb in the cluster. My engine harness was for an automtic, but the wire for the TCC and shift lamp was spliced together in the harness. The ECM grounds the lamp.
-- Joe
-- Joe
Thread
Thread Starter
Forum
Replies
Last Post
Ray87Z
Tech / General Engine
4
07-14-2001 11:45 PM