You lost me here. I have the starter purple wire linked to the T40 wire out of C104, the truck does start. My ls harness doesn't have any other wire for starter beside that purple wire on the starter.Yes. Then rewire the other side of the relay so the GM ECM will control it.
Is the drivetrain all hooked up to the axles? If there are no driveshafts, or your Tcase is in Neutral, or some other way the drivetrain can spin freely, it will do so as you shift through gears. Then when you try to go to Park, it has to stop spinning before the Park pawl can engage.Installed the winters shifter today, not a bad shifter. Am able to shift through all the gears.
When the truck is running, gear in neutral, I hear a grinding noise if If try to shift in Park. The TCC is not yet installed, could that be the reason??
Ahh!! Yeah No, both of the drive shafts are dictonnected. Thanks.Is the drivetrain all hooked up to the axles? If there are no driveshafts, or your Tcase is in Neutral, or some other way the drivetrain can spin freely, it will do so as you shift through gears. Then when you try to go to Park, it has to stop spinning before the Park pawl can engage.
This is how I have the TCC relay hooked up.You can also just shut the engine off while keeping the transmission in gear. Once off, shift to park. Don’t try going from forward to reverse though, or visa versa.
Do you have the schematic for the brake switch from your swap vehicle? It will show when the transmission wants and doesn’t want a brake switch signal.
I will search for the Gm circuit diagram for 04 Silverado.Do you have the schematic for how the GM circuit works? You need to duplicate that circuit while tying it into the brake switch. We can’t tell you if you did it right without knowing what your particular GM circuit calls for.
I will say, looking at your picture more, the relay will not switch. C3:24 is an input. Not an output. You need an 12v output to energize the coil to switch the relay.
Where did you get that from? Pin C1:33 wants to see 12v all the time when the key is on, 0v when brake is pressed. No ???Your GM pcm wants to see 12v at C1:33 when you step on the pedal and 0v when you’re off the pedal. Some of the cars were opposite of this, which is why guys would run a relay off the brake switch. You do not need to run the relay. Simply run a wire from pin 6 on the jeep brake switch to C1:33.
As for your relay switching right now, well, it doesn’t seem to follow what the schematic shows, so who knows. Either way it’s working opposite how you want it.
Looked at this again, and made some adjustment.Your GM pcm wants to see 12v at C1:33 when you step on the pedal and 0v when you’re off the pedal. Some of the cars were opposite of this, which is why guys would run a relay off the brake switch. You do not need to run the relay. Simply run a wire from pin 6 on the jeep brake switch to C1:33.
As for your relay switching right now, well, it doesn’t seem to follow what the schematic shows, so who knows. Either way it’s working opposite how you want it.
You need 12v on key on, 0v when brake is pressed down. here is another clear image.What are we looking at here? Look closely at the 04 Silverado circuit you posted, and what I have posted, isnt that the same?
Interesting!! Though all gen 3 LS were wired that way with a closed switch that opens whn brake applies.Your schematic shows a normally closed switch that is open in the drawing which represents the brake being depressed. It’s noted as such.
The truck schematic I posted shows a normally open switch, that would then close when the pedal is depressed.
The corvette drawing I posted more closely represents what yours shows, which says you’re doing it right if you’re using a car transmission.
Do you know for a fact that your drawing represents the drivetrain you’re using? My source for drawings (alldata) has not let me down yet.
After digging more into this, I see why you believe that gm want to see 12v when brake pressed, 0v off brake. You are getting that from your diagram which is not giving you the full picture. Your gm wiring is showing just the brake Lamp switch which is indeed in the open position, but that has nothing to do with the TCC Positive Circuit.I haven’t searched all years or all models, but I can tell you there are 4l60’s, 4l80’s, and 6l80’s that don’t require the use of the relay. Wire them direct with the brake lights.
2/4wd does not matter for a 2004 GM truck.