[urq] WoT 2-Way Valve sticking

[James Howard]

B+C is the WOT position.
With the ignition off - the valve is normally in this position. When you 
switch on the ignition, power is applied to the valve and it switches to 
A+B. When the WOT switch is activated, the valve should switch to B+C.

You either have no power going to the valve with ignition on, or the valve 
has failed.
The power to the valve goes through the WOT switch which is a normally 
closed switch.
A valve stuck in B+C is normal failure mode for the WOT switch, valve, 
wiring loom or power supply.

Can you measure 12V at the valve connector with ignition on? This should 
fall to 0V when operating the WOT switch.
Can you make the valve operate with an external power source?

Cheers,
Jim.
----- Original Message ----- 
From: "Maurits Jonkergouw" <urq at moregraphics.nl>
To: "Audifans" <urq at audifans.com>
Sent: Sunday, June 19, 2005 5:47 PM
Subject: [urq] WoT 2-Way Valve sticking


My WoT 2-way valve on the firwall is sticking but do not know in what 
position: WoT or normal.

     A
B _|
      |
     C

When the WoT switch is pressed, the valve switch opens A+C, A+B or B+C ? 
it's now sticking at B+C.

Thanks

Regards,
Maurits

1986 GV (Swiss WR)
1985 CGT KV
1982 GL DD
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