Yep, you read the subject and also the problem.

A little explanation is needed. When the knob for the front diff lock is
pulled, and the lock has not engaged yet, the light is supposed to
blink. This is to warn the driver that the knob is pulled, 'cause when
the lock locks, the steering dies, the steering cannot be turned, and
the van can only go straight forward.

The problem appeared after I un-stuck the stuck rod for the lock. The
light blinked when I serviced the unit, but I have later seen that it
does not blink. Yes, the light lights when the lock engages, so its not
the bulb either. The only thing I can think of, is that the light for
the rear lock is dead too. I think it's the bulb, but I haven't replaced
it yet.

Any pointers?

PerL
87 Syncro 112i