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Date:         Tue, 22 Jul 2008 16:02:32 -0400
Reply-To:     David Beierl <dbeierl@ATTGLOBAL.NET>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         David Beierl <dbeierl@ATTGLOBAL.NET>
Subject:      Re: coolant level control unit location
Comments: To: Scott Daniel - Turbovans <scottdaniel@TURBOVANS.COM>
In-Reply-To:  <0b0a01c8ec32$048f01a0$6401a8c0@PROSPERITY>
Content-Type: text/plain; charset="us-ascii"; format=flowed

At 03:34 PM 7/22/2008, Scott Daniel - Turbovans wrote: >I need to identify which relay-looking unit is the Coolant Level Control >unit in an 84 Vanagon. >Not finding the info in Bently. Shows it for 86, but not 84 , that I can >find.

It's high up on the body under left side of dash. Very easy to remove when the dash is off, not so easy when it's on.

>I also understand that one can put an 85 or later one in....... >to 'fix' that handy feature on 84's where if the level is low, it also >pegs the temp gauge needle.

Yes. They both work by sending an overheat signal to the gauge, but the later one sends in brief pulses that don't materially affect the gauge position, taking advantage of the fact that the flasher runs for several seconds every time it is triggered.

>Am I on the right track here ? >also, since i'm getting no flahsing LED in the temp guage at all on this >84........

None on key-on? You should get several seconds of flashing then. If not, then the gauge internal circuit is toast. Or *possibly* regulator has failed and is feeding full system voltage to the gauge -- I don't know whether this would suppress the startup test, although I doubt it. I do know that undervoltage makes it flash continuously.

>and the guage randomly reads very high...............my attention is going >to the guage itself, the voltage stabizer, >and the temp sender on the engine for the temp guage.

If it's the regulator then gas gauge will read high along with temp gauge. My best guess is an intermittent ground in the sender wiring, though a failed level controller isn't out of the question. Suggest removing the level controller to eliminate that possibility. I would *not* expect the gauge itself to intermittently read high, even if the flasher circuit is broken -- not saying it's impossible, but highly unlikely. It's definitely not a problem in the level sender circuit to the controller -- in that case the old-type controller would peg the gauge, not just read high.

-- David Beierl - Providence RI USA -- http://pws.prserv.net/synergy/Vanagon/ '84 Westy "Dutiful Passage," '85 GL "Poor Relation"


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