Excellent explanation, David.  I will file it.  Let me ask though; when I
have that 100k resistor across the legs, and it still blinks, I ground the
resistor or the leg, or its the same thing.
Where would ground be for this sensor, when I have to clean it?
Thanks for the writing,
Zoltan
----- Original Message -----
From: "David Beierl" <dbeierl@attglobal.net>
To: "The Westy man" <zolo@FOXINTERNET.NET>
Cc: <vanagon@GERRY.VANAGON.COM>
Sent: Thursday, November 06, 2008 9:33 AM
Subject: Re: Blinking stops, relay out ...

> At 04:24 PM 11/5/2008, The Westy man wrote:
>>Hi to all,
>>After not using the car for a month, now the coolant light is blinking.
>>But after I pulled the 42 relay out, it stopped.  I somehow have the
>>feeling, it is not the solution.
>>Anyone?
>
> That's good news, means it's not the gauge.  Put the controller back in,
> pull the plug at the pressure tank and jumper across it, then turn on
> ignition.  If that makes it stop blinking, then very high probability that
> all is correct from the jumper forward (to make absolutely sure, use a
> 100K resistor for the jumper.
>
> If it still blinks, short the jumper to ground and try again.  If that
> cures it, you have a bad ground on the plug.
>
> If these tests succeed, pull the sensor out and vigorously clean pins with
> fine sandpaper, also check that your coolant has correct 50/50 mix.
>
> If they don't succeed, you have a bad controller or an open circuit in the
> wiring from sensor to controller.
>
> Cheers,
> David
>
>>Zoltan
>
> --
> David Beierl - Providence RI USA -- http://pws.prserv.net/synergy/Vanagon/
> '84 Westy "Dutiful Passage," '85 GL "Poor Relation"
>
>
> --
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