Intermittent Shift light 1987 240GL

[Jocmarsh]

I have a strange problem. My 1987 240GL has recently started lighting up the
yellow arrow that comes on when you click the control on the automatic
transmission that prevents shifting from 3rd to 4th gear. When this happens,
the light stays on in both positions of the toggle that activates that
function. If I engage the fucntion I hear a buzzing sound coming from under
the dash somewhere. If I click the control again the buzzing stops but the
light stays on. Sometimes the car shifts fine into 4th even when the light is
on and at other times it doesn't seem to be shifting.
The light normally comes on when I turn on the ignition (as a test of the bulb,
I think) but goes off as soon as the engine is started.But now, sometimes it
goes out automatically on start up and at other times it doesn't.

Any ideas of what the problem might be? Does it sound expensive to fix? How
do I troubleshoot the problem?

Thanks

John
Merrimack, NH

 

[volvowrench]

I have a strange problem. My 1987 240GL has recently started lighting up the
yellow arrow that comes on when you click the control on the automatic
transmission that prevents shifting from 3rd to 4th gear. When this happens,
the light stays on in both positions of the toggle that activates that
function. If I engage the fucntion I hear a buzzing sound coming from under
the dash somewhere. If I click the control again the buzzing stops but the
light stays on. Sometimes the car shifts fine into 4th even when the light is
on and at other times it doesn't seem to be shifting.
The light normally comes on when I turn on the ignition (as a test of the bulb,
I think) but goes off as soon as the engine is started.But now, sometimes it
goes out automatically on start up and at other times it doesn't.

Any ideas of what the problem might be? Does it sound expensive to fix? How
do I troubleshoot the problem?

Thanks

John
Merrimack, NH

Remove the screws for the glove box. The relay is on the left. Replace it
with a new one. Throw the death clip that is crushing the case away.

Bob