FW: Help with center diff locking switch on 85 4ksq

["Fong, Willie Y" <wfong@svl.ems.lmco.com>]

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From: 	Fong, Willie Y
Sent: 	Monday, September 8, 1997 7:02 AM
To: 	'Q list'
Subject: 	Help with center diff locking switch on 85 4ksq


Just noticed since last season that my switch for locking the center and
rear diff's are not working. The green light does not come on and the
way car handles, i can tell that it's not engaged. 

I know the system is vacuum engaged, any where i should start checking?,
are there any known fail points with the system with a car of this age?
any help would be much appreciated....thanks in advance.


Will 
85 4ksq