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Old May 14th, 2008, 08:00 PM
TURBOPOWERED68's Avatar
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What signals should I have at the Trans plug?

Going into the Trans what signal should be at the plug.

Example:
if i unplug the Trans and check the top left wire on the plug, (harness side)(plug facing me) what should the signal be? +/- nothing
And the same for the rest of the wires.

also if the trans is in gear (and pluged in)what signal should be cominig out of the Trans when?
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1968 LC2 Powered Chevelle
best time
12.686 @ 105.15
12.916 @ 106.95
13.029 @ 102.88

1987 Turbo Regal - http://www.turbobuick.com/forums/car...rbo-regal.html

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PARTS WANTED
1-CHEVY 12 Bolt rear for 68-72 A-body
2-Power logger
3-Translater + LS1 MAF or 4 inch MAF pipe
4-Good Used H&R motor mounts.

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  #2 (permalink)  
Old May 15th, 2008, 06:24 AM
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Ttt
__________________
1968 LC2 Powered Chevelle
best time
12.686 @ 105.15
12.916 @ 106.95
13.029 @ 102.88

1987 Turbo Regal - http://www.turbobuick.com/forums/car...rbo-regal.html

Support a track in L.I, NY sign up at
http://www.limotorsports.net/forum/index.php

PARTS WANTED
1-CHEVY 12 Bolt rear for 68-72 A-body
2-Power logger
3-Translater + LS1 MAF or 4 inch MAF pipe
4-Good Used H&R motor mounts.

  #3 (permalink)  
Old May 15th, 2008, 05:25 PM
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Going by wire color, tan/black is lockup(pin D), purple is +12V feed(pin A), dk grn/white is 3rd gear switch(pin C), light blue is 4th gear switch(pin B).
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Art
68 Camaro, LS2 install in progress
72 Skylark 350, slow but consistent 13.69@94
98 Regal GS - Parting out when I get time
86 GN, 11.22@117.9 stock motor on 110 octane - sold

Historically, violence is the only thing that solves anything permanently...
  #4 (permalink)  
Old May 15th, 2008, 06:34 PM
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Quote:
Originally Posted by SRGN View Post
Going by wire color, tan/black is lockup(pin D), purple is +12V feed(pin A), dk grn/white is 3rd gear switch(pin C), light blue is 4th gear switch(pin B).
SRGN thanks for all of the help Dude.

Is this how it works?
1- The computer feeds tan/black -/ground to activate the L/U
2- Purple is always live +12V to the L/U solenoid
3- 3rd gear switch Dk grn/white feeds the computer Ground when the Trans is in 3rd gear.
4-4th gear switch Lt blue feeds the computer Ground when the Trans is in 4th gear.

Did I get this right?


Does the computer know when the car is in 1st or 2nd?
If so
How?
__________________
1968 LC2 Powered Chevelle
best time
12.686 @ 105.15
12.916 @ 106.95
13.029 @ 102.88

1987 Turbo Regal - http://www.turbobuick.com/forums/car...rbo-regal.html

Support a track in L.I, NY sign up at
http://www.limotorsports.net/forum/index.php

PARTS WANTED
1-CHEVY 12 Bolt rear for 68-72 A-body
2-Power logger
3-Translater + LS1 MAF or 4 inch MAF pipe
4-Good Used H&R motor mounts.

  #5 (permalink)  
Old May 15th, 2008, 08:21 PM
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That's pretty much it, ECM uses the park/neutral switch to know it's in gear and if the 3rd or 4th gear switches aren't activated it assumes 1st or 2nd gear(doesn't make a difference to ECM whether 1st or 2nd).
__________________
Art
68 Camaro, LS2 install in progress
72 Skylark 350, slow but consistent 13.69@94
98 Regal GS - Parting out when I get time
86 GN, 11.22@117.9 stock motor on 110 octane - sold

Historically, violence is the only thing that solves anything permanently...
  #6 (permalink)  
Old May 15th, 2008, 08:24 PM
TURBOPOWERED68's Avatar
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Quote:
Originally Posted by SRGN View Post
That's pretty much it, ECM uses the park/neutral switch to know it's in gear and if the 3rd or 4th gear switches aren't activated it assumes 1st or 2nd gear(doesn't make a difference to ECM whether 1st or 2nd).
thanks Dude.
__________________
1968 LC2 Powered Chevelle
best time
12.686 @ 105.15
12.916 @ 106.95
13.029 @ 102.88

1987 Turbo Regal - http://www.turbobuick.com/forums/car...rbo-regal.html

Support a track in L.I, NY sign up at
http://www.limotorsports.net/forum/index.php

PARTS WANTED
1-CHEVY 12 Bolt rear for 68-72 A-body
2-Power logger
3-Translater + LS1 MAF or 4 inch MAF pipe
4-Good Used H&R motor mounts.

  #7 (permalink)  
Old May 16th, 2008, 02:56 PM
I think, therefore I am??
 
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Quote:
Originally Posted by TURBOPOWERED68 View Post
SRGN thanks for all of the help Dude.

Is this how it works?
1- The computer feeds tan/black -/ground to activate the L/U
2- Purple is always live +12V to the L/U solenoid
3- 3rd gear switch Dk grn/white feeds the computer Ground when the Trans is in 3rd gear.
4-4th gear switch Lt blue feeds the computer Ground when the Trans is in 4th gear.

Did I get this right?


Does the computer know when the car is in 1st or 2nd?
If so
How?
Given this information, can I temporarily tee into the ground wire at the harness with a toggle wired in the cabin and manually override/test my converter lockup?

Thanks, Jay
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--'87 Buzda... TA61, PI 7 disc, EP Front mount, ought to run!
--'87 WE4 63K ... heads/intake, TA62, CAS V-4 IC, 50# inj., alky, 62/65mm TB, Translator+, Mease DP, PI 9.5" l/u, Jimmy's Trans., best: 11.65, 116.2 mph, and 1.642 60' Gone, but not forgotten: RIP Andy
--'86 gray T-Type 94K... "YGETV8",11.755@117.89 stock long block & on pump gas! SOLD 6/03
--'86 GN "Beater"... stock combo 12.6@111.97 SOLD 8/02
--'03 Cobra, 11.2@128- stock... yeah, right!
  #8 (permalink)  
Old May 16th, 2008, 03:54 PM
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Quote:
Originally Posted by YGETV8 View Post
Given this information, can I temporarily tee into the ground wire at the harness with a toggle wired in the cabin and manually override/test my converter lockup?

Thanks, Jay
Just ground pin "F" of the ALDL connector under the dash and it will accomplish the same thing. Pin "A" is ground, you could do it with a paper clip if you wanted to.
__________________
Art
68 Camaro, LS2 install in progress
72 Skylark 350, slow but consistent 13.69@94
98 Regal GS - Parting out when I get time
86 GN, 11.22@117.9 stock motor on 110 octane - sold

Historically, violence is the only thing that solves anything permanently...
  #9 (permalink)  
Old May 16th, 2008, 05:07 PM
I think, therefore I am??
 
Join Date: May 2001
Location: Iowa
Trader Rating: (2)
Posts: 668
Thanks, but I forgot to mention that I have no ALDL - it wasn't installed during the conversion. I would like to do it at the trans and make sure the problem is in the wiring before that, not in the trans itself.
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Jay Jackson
http://hometown.aol.com/ygettv8/1index.html
--'87 Buzda... TA61, PI 7 disc, EP Front mount, ought to run!
--'87 WE4 63K ... heads/intake, TA62, CAS V-4 IC, 50# inj., alky, 62/65mm TB, Translator+, Mease DP, PI 9.5" l/u, Jimmy's Trans., best: 11.65, 116.2 mph, and 1.642 60' Gone, but not forgotten: RIP Andy
--'86 gray T-Type 94K... "YGETV8",11.755@117.89 stock long block & on pump gas! SOLD 6/03
--'86 GN "Beater"... stock combo 12.6@111.97 SOLD 8/02
--'03 Cobra, 11.2@128- stock... yeah, right!
  #10 (permalink)  
Old May 21st, 2008, 08:03 AM
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"ECM uses the park/neutral switch to know it's in gear"

i could wire in a switch but to which wires?
__________________
1968 LC2 Powered Chevelle
best time
12.686 @ 105.15
12.916 @ 106.95
13.029 @ 102.88

1987 Turbo Regal - http://www.turbobuick.com/forums/car...rbo-regal.html

Support a track in L.I, NY sign up at
http://www.limotorsports.net/forum/index.php

PARTS WANTED
1-CHEVY 12 Bolt rear for 68-72 A-body
2-Power logger
3-Translater + LS1 MAF or 4 inch MAF pipe
4-Good Used H&R motor mounts.

  #11 (permalink)  
Old May 21st, 2008, 08:10 AM
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Quote:
Originally Posted by TURBOPOWERED68 View Post
SRGN thanks for all of the help Dude.

Is this how it works?
1- The computer feeds tan/black -/ground to activate the L/U
2- Purple is always live +12V to the L/U solenoid
3- 3rd gear switch Dk grn/white feeds the computer Ground when the Trans is in 3rd gear.
4-4th gear switch Lt blue feeds the computer Ground when the Trans is in 4th gear.

Did I get this right?


Does the computer know when the car is in 1st or 2nd?
If so
How?
Almost:

1 correct
2 well yes, but there's a brake switch that that 12v goes through, so when you press the brake pedal that 12v is lost, thus temprarilly unlocking the TCC
3 correct
4 correct
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  #12 (permalink)  
Old May 21st, 2008, 08:33 AM
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Quote:
Originally Posted by TURBOPOWERED68 View Post
"ECM uses the park/neutral switch to know it's in gear"

i could wire in a switch but to which wires?
Quote:
Originally Posted by TurboDave View Post
Almost:

1 correct
2 well yes, but there's a brake switch that that 12v goes through, so when you press the brake pedal that 12v is lost, thus temprarilly unlocking the TCC
3 correct
4 correct
thanks i did wire in the brake pedal switch.

could i check the constant positive with just the key in the on position with out turning on the car.

also what about the above stuff?
__________________
1968 LC2 Powered Chevelle
best time
12.686 @ 105.15
12.916 @ 106.95
13.029 @ 102.88

1987 Turbo Regal - http://www.turbobuick.com/forums/car...rbo-regal.html

Support a track in L.I, NY sign up at
http://www.limotorsports.net/forum/index.php

PARTS WANTED
1-CHEVY 12 Bolt rear for 68-72 A-body
2-Power logger
3-Translater + LS1 MAF or 4 inch MAF pipe
4-Good Used H&R motor mounts.

  #13 (permalink)  
Old May 21st, 2008, 09:18 AM
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Quote:
Originally Posted by TURBOPOWERED68 View Post
thanks i did wire in the brake pedal switch.

could i check the constant positive with just the key in the on position with out turning on the car.
Yes.


Quote:
also what about the above stuff?
Cant answer that, I'm at work now and haven't any reference material handy.
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TranslatorPro MAFless fuel, spark, boost and fuel pump management

86 GN(Translator Pro/Extender Pro/w Boost control, PLX WBO2 (original owner)
87 GN (second owner)
01 Excursion LTD 7.3L PSD(Power Stroke Diesel), Turbo, 4X2
08 Honda Accord EX-L, 270HP 3.5V6, AT
  #14 (permalink)  
Old May 21st, 2008, 07:17 PM
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The ecm gets a ground from the p/n switch when it's in gear. See the attached diagram.
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__________________
Art
68 Camaro, LS2 install in progress
72 Skylark 350, slow but consistent 13.69@94
98 Regal GS - Parting out when I get time
86 GN, 11.22@117.9 stock motor on 110 octane - sold

Historically, violence is the only thing that solves anything permanently...
  #15 (permalink)  
Old February 22nd, 2010, 04:26 PM
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Quote:
Originally Posted by TURBOPOWERED68 View Post
SRGN thanks for all of the help Dude.

Is this how it works?
1- The computer feeds tan/black -/ground to activate the L/U
2- Purple is always live +12V to the L/U solenoid
3- 3rd gear switch Dk grn/white feeds the computer Ground when the Trans is in 3rd gear.
4-4th gear switch Lt blue feeds the computer Ground when the Trans is in 4th gear.

Did I get this right?

You have the first two correct.The third and fourth gear switches are normally closed. This means that the lt blue and dk gn wires are connected to ground until their respective switches are opened as each gear comes on.
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