jasonandrobinegly@embarqm
New User
How to correctly identify positive ground or negative ground for ordering a fuel gauge?
- Thread starter jasonandrobinegly@embarqm
- Start date
jasonandrobinegly@embarqm
New User
jasonandrobinegly@embarqm
New User
Thank you.
Tx Jim
Well-known Member
- Location
- Coyote Flats, Texas
Ditto fuel gauge was powered by LH battery when it left the factory & LH battery positive post was attached to tractor frame
Bob Bancroft
Well-known Member
- Location
- Aurora NY
I seem to recall a gauge with the posts totally isolated and marked, so you could hook it up either way, as necessary. Am I
dreaming?
dreaming?
I believe that the first series 4020 gas and diesel used a fuel gauge designed for a positive ground system. The second series used a negative ground system and a fuel gauge designed to work with a negative ground. Of course, many have been changed. If it is an early tractor converted to an alternator, I would expect a negative ground system which will require the installation of a fuel gauge designed for negative ground. I have converted a 65 gas 4020 to an alternator and had to change the fuel gauge, the new negative ground fuel gauge worked fine with the original sending unit.
Fixingfarmer
Member
To know for certain what voltage and polarity you have at
sender put positive lead of voltmeter on wire going to sender
with sender unplugged key switch on and negative on a
ground. If its reverse polarity most meters read -12.0v
meaning current is flowing in reverse through your meter.
Negative ground would read 12v. Also checks if you have 12
or 24 volts
sender put positive lead of voltmeter on wire going to sender
with sender unplugged key switch on and negative on a
ground. If its reverse polarity most meters read -12.0v
meaning current is flowing in reverse through your meter.
Negative ground would read 12v. Also checks if you have 12
or 24 volts
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