<VV> Temp/Pressure light problem.

[Frank DuVal]

I am confused by the terms.

If there is "no power on the other", does that mean the other is at 
ground potential, or is it floating in mid air, not connected to ground 
i.e. infinite resistance to ground.

The answer to this will tell in which direction to start looking.

Note, in the course of operating the engine, BOTH conditions occur in a 
normally operating car.

When the oil pressure is low (or temperature is high) the "other" wire 
is at ground potential.

When the oil pressure is correct and the temperature is below too hot, 
the "other" is floating, infinite resistance to ground. Note, this 
reading is taken with the bulb out of the circuit. Putting the bulb in 
will make the floating terminal read +12 volts.

Frank DuVal

Bryan Blackwell wrote:

>I read that as +12 on one terminal, and nothing on the other.  That  
>sounds the way it should be.
>
>--Bryan
>
>On Dec 14, 2009, at 8:46 PM, AeroNed at aol.com wrote:
>
>  
>
>>Matt,
>>
>>You can't read Jersey? Brian said there's power to one wire at the  
>>socket,
>>but not the other. The problem has got to be there. There's got to  
>>be an
>>open in  the socket, since the bulb is good.
>>
>>Ned (Jersey native and translator)
>>    
>>
>
>
>  
>