wbo2 testing question

[Stephen Andersen]

After I realized that my LED was in "backwards", and that 
it was toast because of this, I replaced it the right way.

I then tried Bruce's tests using 1.59 worth of RS resistors.

The test worked just as Bruce said.  The LED came on within
about 10-11 second with 10 ohms, and didn't come on at all
with 5.  Voltages checked out as noted.

Guess I just need to check some voltages in the controller 
side of the circuit from the schematic, and get myself a 
connector for the sensor, and I am set!!!

Thanks!!

Steve


> -----Original Message-----
> From: owner-diy_efi at diy-efi.org [mailto:owner-diy_efi at diy-efi.org]On
> Behalf Of bcroe at juno.com
> Sent: Sunday, December 30, 2001 2:17 AM
> To: diy_efi at diy-efi.org
> Subject: wbo2 testing question
> 
> 
> OK, here's a couple ideas on checking the heater circuit.
> 
> Connect a 10 ohm 10 watt resistor and a voltmeter to the
> heater terminals.  Apply 14 volts to the battery input.  The 
> voltage at the heater terminals should rise in a few 
> seconds to between 10 and 10.5 volts.  Move the 
> voltmeter to across the 1 ohm 5 watt WB resistor, and 
> the voltage should be around 1 volt.  The heater LED 
> should come on.
> 
> Repeat the tests using a 5 ohm  10 watt resistor.  A 
> pair of 10 ohm in parallel will work.  The voltage across 
> the 5 ohm should be around 6.25 volt, and across the 
> 1 ohm, 1.25 volt.  The LED should not come on.  Do 
> not leave this powered any longer than necessary to 
> make the measurements, or the heater regulator will 
> get very hot.
> 
> Bruce Roe

----- End of forwarded message from owner-diy_efi at diy-efi.org -----
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