I have a 91 GL and the only time I heard a buzzer is when the oil pressure
buzzer went off.  This was solved by putting in 20-50 weight oil

Jim
Wilmington, NC

On Tue, Sep 1, 2009 at 11:32 AM, Charles Nighbor <cnighbor1@comcast.net>wrote:

> Help the blinking coolant indicator light on my 91 Vanagon Auto Multi van
> comes on and buzzes at interment times. And the engine is not over heating.
> I know there are at least three sensors to register hot engine and or hot
> coolant. Is the air conditioner interconnected. Because it worked, didn't
> work than worked when one of coolant hoses was just replaced and now doesn't
> work. How would you determine which sensor is the bad one. Computer engine
> scans don't nessecary include all sensors on these engines. I had this
> problem 6 to 8 months ago than it went away.
> Any ideas
> Charles Nighbor
>