91 Turbo coolant switch

[91 turbo]

On the 91 turbo on the water outlet there is a coolant temp sitch and a cold start injecter timer. Does anyone know which is the black one and which is the green one. Manuel does not help.

[Pineapple]

The switch will have either 0 or infinity ohm. The timing switch will have different resistance. Both depends on coolant temp.
Don't think its the switch on the water outlet. Usually fan switch is on the rad. It should be temp sender which have different ohm vs temp.
The temp sender is green plug. Timing switch should have black and green wire. Its from 90-91 Celica 3S-GTE Toyota manual.