I did the LS1 swap and was kicking around the shift light idea. Third gens come with a stock shift light in the dash that is used in manuals and not in auto cars. the spot is still there in auto cars also. My car was auto converted to T56. I installed a lamp into the stock location. soldered a wire onto the ground side and hooked it to the LS1 PCM and did some tuning. THere it was. 6400 and the shift light comes on. Works very well. Im gonna add some LEDs on the dash also because i think it will look cool. Just a FYI for anyone thinking about it. Easy to do and works great.

 

i was wondering about that but never got around to asking about it. So what pin on the LS1 pcm controls the shift light? i'm using the 411 pcm

 

i have seen drag cars with automatics with a large aftermarket tach with a working shift light.

I know its not required but wonder how they wired their up ?

 

Those huge shift lights attached to the tachs are controlled by the tach itself.

Im running a Harlan shift light right now and I love it... But that idea the OP had with using the thirdgen dash light is a good one! I always found the stock shift lights in cars that have them are pretty useless. They always light up at times where its not really good to upshift...but since you tuned the PCM to turn it on when you want, Im sure that works awesome. And you dont have some big ugly shift light shining like the sun on your face at night.

Good idea!!

Justin

 

pin #47

 

Sweet thanks man, so i'll just take my tan/blk that went to the old TBI computer and run it to pin 47 on the red connector of the ls1 computer.

 

BTW I've posted a link below that I found very helpful in finding wiring diagrams for my 89, this is where I found a diagram for my instrument cluster for wiring up my SES light etc.

http://www.austinthirdgen.org/index.php?pid=19

 

Pin 47 on what connector?

Pinout doesnt seem right...

 

Putting a shift light on a 2002 chevy express van doesn't seem right either but who am I to judge.

 

The pics were comparing the pinouts between the two. They were the only pinout list I knew off at quick reference

I posted it simply because pin 47 was taken in both both connectors and I was wanting clarification as to which pin 47 he used

 

I contemplated doing this. It's been awhile since I looked at the back of a thirdgen cluster, but can you just grab another PC194 socket/bulb thing and stick it in? I mean the OP said he soldered a wire to the socket but what about just sticking the socket in and hooking up to the c207 connector down by the pcm?

 

That's what I did for the SES light, and i'm going to do the same thing for the shift light. I checked the diagram for my 89 and cut the tan/wht wire from the connector that went to the old computer and hooked it up to the LS1 computer. From my understanding, the SES and shift light have 12v constant and is grounded by the computer. I believe this is right but I cant remember.

 

hi there do you have any idea about the lt1 . i want to operate the shiftlight but where i looked in the lt1 pcm pin out i didnt find the pin who will make it work

> my car is 1989 iroc z , lt1 engine with full bolt on , hooker long tube headers , t5 transmition , aluminum propellar shaft , 3.70 with new cones preision gears borg warner rear end , lowering kit , some other weatherstrip works