Usually, 12 volts go to the solenoids but it's always best to verify. It can be difficult to find diagrams and schematics for free. Professional mechanics use paid services such as All Data and Mitchell Pro Demand. All Data has a DIY section for individual vehicles, but it does cost but the month and they often have recurring monthly fees so if used be wary which service is bought. Finding a manual for your specific vehicle with transmission information is likely best.
Where is a good place to find schematics and rating such as, how much ohms or voltage a circuit should have? just google?
Usually, 12 volts go to the solenoids but it's always best to verify. It can be difficult to find diagrams and schematics for free. Professional mechanics use paid services such as All Data and Mitchell Pro Demand. All Data has a DIY section for individual vehicles, but it does cost but the month and they often have recurring monthly fees so if used be wary which service is bought. Finding a manual for your specific vehicle with transmission information is likely best.