baezi z06

iTrader: (2)

Hi

i´m gona have manual lock up switch in combo

i have a switch board whith switch Volts and ground to it , but while i was measuring the V on the lock up switch i noticed while the car is not running and only key switch on there is a 12V read from the pcm

is that normal ? or is my switch board not working correctly
i was gona see if the switch works but i cant see that because the wire from the lock up switch to TCC wire from the PCM shows Voltage...

thanks
Baezi

jimmyblue

iTrader: (11)

You ground the apply solenoid to engage the TCC. But
you also probably want to energize the TCC pressure
servo (PWM) to ensure there's enough pressure to do
a job. That would be +12V applied.

Me, I'd spend a little extra effort and make something
where the engage button is momentary, set a latch
and the brake light signal resets it. Just so you don't
keep having to remember about that as you coast
down to stop, buck and die.

baezi z06

iTrader: (2)

this is a push on button just like the purge button

so i push it and hold it then it should lock up but when i relese the button it should release the lock up

using this in drag racing

Baezi

slow67

iTrader: (2)

Yes, when it isn't grounded, it is +12V. It's using a pullup resistor, so that it won't float, and the pcm think that it is grounded.

baezi z06

iTrader: (2)

so it´s normal to read V from it when the key switch is on,

Baezi

slow67

iTrader: (2)

Yes, if its not grounded, it WILL see +V.