[stackj]

Nick,

Pete is right. Look at figure 5-40 on page 5-92 in your service manual for a simplified landing gear wiring circuit. The three gear up switches are in the center of the drawing. The amber light will be on if all three of the switches are closed. This indicates that power is being applied to the Landing Gear Door solenoid, allowing hydraulic pressure to close the doors.

The handle Up-Down switch could also cause your problem, however, if that was the fault, your amber light would be on.

See attachment.