Fuel pump polarity
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Fuel pump polarity
Hi group, does anyone know if it is possible to change the cars pollarity without affecting the fuel pump. I have been told that when I change the car from positive earth to negetive earth the fuel guage will read the wrong way (until I change the connections over). Thanks sam.
BIRMINGHAM, got a two door moggy 1098cc Check out my pictures at http://www.matmice.com/home/morrisminor
[img]http://www.matmice.com/home/morrisminor/images/rns.jpg[/img]
[img]http://www.matmice.com/home/morrisminor/images/rns.jpg[/img]
I might be wrong, but it's the first time I've heard that - no mention of it in the technical tips either - http://www.mmoc.org.uk/technicaltips/Ne ... Earth.html
a
a
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In a word Sam - NO!
(It's an old wives tale, at least in respect of the Minor's fuel gauge). In respect of the title, the pump and fuel gauge are separate items - but neither have polarity issues....

Moved to electrical where this belongs.

Four and a half years since I did mine. You're supposed to reverse the dynamo's polarity (which I did), but it seems that some dynamos will change over anyway (like Terry's).All i did with mine was turn the battery round, everything seems fine. its only been like it for 5 years now

Moved to electrical where this belongs.

Chris
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1969 2-Door daily driver
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1969 2-Door daily driver
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Alec, thanks for the explanation. So with those systems it's REALLY important that the polarity is observed as connecting the terminals the wrong way will blow the diode!!
Yes, diodes are only available in one polarity. It just depends on which way round you connect them so it should be easy enough to de-solder and reverse. Assuming of course that the solenoid arrangement is not polarity/direction senstive!
Yes, diodes are only available in one polarity. It just depends on which way round you connect them so it should be easy enough to de-solder and reverse. Assuming of course that the solenoid arrangement is not polarity/direction senstive!

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