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I am not sure, if the high pressure switch has a shrader valve on 86 application. However you still can use a/c with jumper instead of switch: in such position, the fans with a/c on will run on the low speed (connected in series), and will run at high speed (parallel), once engine reaches its operational temperature). Unless a/c is overcharged, such use should not cause damages.
We use this "cheating" on 1988 Corolla.
On 86 camry, if it has A140e transaxle, the lock-up signal is sent from computer and based on the input from TP sensor, and two speed sensors. Generally speaking, if the throttle is above idle, both speed sensors are working, the speed is above 45...50 mph and coolant temperature is above low mark on the gage, the lock up should engage. For more specific details refer to Autoshop.101, by K.Sullivan, technical articles, electronic transmission controls. You can split a small wire from the lock up connector on the transmission, and connect other end to the small light bulb such as 7219 or 73. Place this bulb in easy -to -see location and attach other lamp's term. to the ground. Once car is driven you can see if signals to lock-up solenoid are sent (lamp on) and if lock up is actually taking place ( rpm drop and more direct responce to the throttle manipulation).
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