780 V6-2849cc 2.8L SOHC B280F (1987)
Wiring Diagram - 4th Gear Disengaged
Disengagement of 4th gear
The stepping relay deenergizes the solenoid valve when switch 54 on the gear lever knob is depressed, supplying current instead to indicating
lamp 102.
The solenoid valve now alters the fluid flow in the control system to produce a downshift from 4th gear to direct drive (3rd).
Fourth gear remains disengaged until the switch is again operated.
When the ignition is switched off, the stepping relay reverts to its normal status. In other words, the solenoid valve is energized, engaging 4th
gear, when the ignition is again switched on.
