retardedpenguin

iTrader: (2)

Can anyone help me? There's like 5 wires on the pedal but 9 going to the plug, are the others not used? It was cut when I got it so basically I have the pedal, plug and wires and the module, plug and wires but there are more wires on the module than the pedal...

ls1nova71

iTrader: (4)

The other wires are for cruise control, there should be a gray, gray with black stripe, and a dark blue that go to the cruise switch. If you're not running cruise, you can get rid of them.

busta9876

iTrader: (3)

what year you working with here? 2003 to 2005 had a 10 position plug on each end, one end white, one end black. Some years had 9 wires, some only had 6 wires. From my understanding, from 2003+ only 6 wires were needed. In 2006, the gas pedal went to a smaller plug, but other end at the TAC module was still the same.

first attachment named "Engine Data Sensors - Electronic Throttle Controls.gif" is the 2006 schematic. Notice the pin location for the APP sensor (gas pedal) is 1,2,3,4,5,6. This is the small 6 pin.

The second attachment is specific to 2004 truck. Its labeled with letters. The schematic shows APP Sensors 1-3, however, I have seen these with just 2 of the 3 wired up. I can't remember exactly which one is not used.

pull the gas pedal to tac module jumper harness out of your 04 caddy and look at it.

retardedpenguin

iTrader: (2)

I have no clue what years, they just gave it to me out of a silverado(junkyard). There are 9 wires on the module and 6 on the pedal.. Unfortunately I don't have the caddy any more. I just matched the colors up and yeah, didn't work lol..

retardedpenguin

iTrader: (2)

So which wires go where?

Jim_PA

iTrader: (9)

None of the cruise control wires go between the TAC and the pedal.

It looks like you have a 2003'ish TAC module (3 APP sensors) and a 2005'ish pedal (2 APP sensors).

You need a different pedal or a different TAC module, but the OS (year, mainly) inside your PCM would dictate which part you need to change out.

There's some good 2003-2004 (3 APP sensor) schematics here on pages 1 and 3: https://ls1tech.com/forums/pcm-diagn...al-travel.html

FastKat

iTrader: (10)

This is correct - none of the wires between the TAC module and the pedal go to the cruise control.

I'm not so sure about this, though I could be just lucky. I am successfully running a 1997-04 Corvette DBW system (TAC module, throttle body, pedal) on a 2006 Sierra 2500HD PCM and harness. I think the important thing is to make sure the TAC module, throttle body, and pedal are all compatible. If that's the case, you can use them (together) on a wide range of LS-based vehicles. Of course, the PCM should be from a DBW vehicle that uses a TAC module. (Some PCMs are not DBW, and some of the later DBW systems do not use TAC modules.)


PM me if you need any wiring diagrams.

Jim_PA

iTrader: (9)

I'm not so sure either, but I know something is different between 2004 and 2006 OS's for the pedal (at the very least).

To avoid buying any other mismatched stuff, I'd recommend going by the year/make/model of the OS when getting a TAC/pedal.

ls1nova71

iTrader: (4)

Before he posted the pics, I thought he was refering to his engine harness was cut before the TAC, the other plug.

retardedpenguin

iTrader: (2)

Alright, guess imma run by the yard and get a 2 sensor tac. My engine is an 04 and I think the PCM is also.

Jim_PA

iTrader: (9)

The wires you are holding up from the TAC tell me you have the 3-sensor TAC, but I'm not so sure if using the 2 sensor TAC/Pedal with a PCM configured for 3 sensors will work or not.

A - Gray
B - Purple
C - Lt Blue
D - Tan
E - Yellow/Black
F - Blue
G - White/Black
J - Brown
K - Green

At the pedal, they need to be mapped like this:

TAC - PEDAL
A-A
K-K
E-J
B-B
C-C
D-D
J-E
F-F
G-G

You could try to pin the TAC-Pedal cable like above, it might work just fine. I'm not sure if they actually use a different pedal sensor, or if they just don't hook up the 3rd APP circuit in the later years.

https://ls1tech.com/forums/14466569-post44.html

retardedpenguin

iTrader: (2)

My pedal is missing the J wire.

Jim_PA

iTrader: (9)

Well, I guess we know they use different sensors

retardedpenguin

iTrader: (2)

So I got a different Tac with 6 wires but the plug is smaller than the one on the pedal, I tried to match everything up and it still doesn't work.. What now?

retardedpenguin

iTrader: (2)

I've gone through 3 different pedal/ tac set ups in every combo possible and nothing works. I don't know what to do right now, what's the deal? Can the TB go bad?

retardedpenguin

iTrader: (2)

Anyone?

FastKat

iTrader: (10)

What kind of vehicle did your throttle body come off of? Some sort of Cadillac?

retardedpenguin

iTrader: (2)

04 silverado. I've tried every tac/ pedal set up from 03 to 06.

psiconversion

iTrader: (5)

What tune is on the pcm?

Jon
PSI

retardedpenguin

iTrader: (2)

I don't know, I'm going to take it to g force tomorrow, had to help a friend out today so I didn't have time.