Fuel Pump Relay question

[Tony Hoffman]

Chris,
 
It's not a magnetic field generator. Rather, it takes the 12V and ground going to it, and turns it into a 4.5V square waveform for the ECU. So, if you loose the 4.5V signal when the car dies, it points to one of two problems. Either the hall generator is bad, or you are losing one of the other signals going to it.
 
Tony Hoffman

Chris Hall <badcomrade at gmail.com> wrote:
Yeah, that'll shut me up :)

This has to be one of the longest running threads ever... 61 replies
now. Sorry!

I bought a little LED at radioshack. 12volt... and has looong leads
on it. I was thinking of trying to use it as a test light. Anyone
know what wires carry the electrical charge FROM the sender to the
ECU? I'm thinking it's gotta be what.... 4.5volts or something? Or
is it even less? If it's 4.5, that should light the led up every time
the window passes the sensor I'd think, right?

That way, I can watch the engine and hope it stalls before my eyes and
watch to see if there's no more signal pulsing the LED when it does...
because wouldn't it still pulse even with no power, since a hall
generator generates it's own electricty with the magnet creating power
by going through the magnetic field, etc (doesn't it? lol)?
		
---------------------------------
Discover Yahoo!
 Stay in touch with email, IM, photo sharing & more. Check it out!