one thing to consider, the gauge is made to work with a MINUMUM (let's say 20 ohms) resistance, if you short it to direct to ground (eliminating the sender) to check the gauge operation the current flow will be too high and possibly burn out the gauge, it must have a certain resistance as a minimum to prevent damage to the gauge. is the gauge still good?
****obvious question, how much gas is in the tank?****
you said it was between the red and white if i remember correctly.
simple?? check for continuity and shorts...
all connections must be clean first!
record the voltage across the battery terminals.
disconnect the sender wires at the tank
turn the ignition switch on
switch the voltmeter to 20v d.c. scale.
hook the negative of your voltmeter to the negative terminal of the battery.
you should have at or near battery voltage on the wire TO the gauge and about the same coming out of the gauge TO the sender with the sender still disconnected.
check the voltage of the wire AT the sender coming from the gauge, at that wire you should have about the same voltage as at the gauge with the sender still disconnected.
turn ignition key off
switch voltmeter to ohms.
measure the resistance from the OTHER wire at the sender (ground side) it should read about (i'm guessing here) 2? ohms.
disconnect the wire at the gauge coming FROM the gauge to the sender (leaving it disconnected at the sender) touch the red (positive) lead of the voltmeter to the wire just described it should read infinite (no resistance, OL ect.)
i don't have a wiring diagram i'll see if i can scrounge one up if needed.
****obvious question, how much gas is in the tank?****
you said it was between the red and white if i remember correctly.
simple?? check for continuity and shorts...
all connections must be clean first!
record the voltage across the battery terminals.
disconnect the sender wires at the tank
turn the ignition switch on
switch the voltmeter to 20v d.c. scale.
hook the negative of your voltmeter to the negative terminal of the battery.
you should have at or near battery voltage on the wire TO the gauge and about the same coming out of the gauge TO the sender with the sender still disconnected.
check the voltage of the wire AT the sender coming from the gauge, at that wire you should have about the same voltage as at the gauge with the sender still disconnected.
turn ignition key off
switch voltmeter to ohms.
measure the resistance from the OTHER wire at the sender (ground side) it should read about (i'm guessing here) 2? ohms.
disconnect the wire at the gauge coming FROM the gauge to the sender (leaving it disconnected at the sender) touch the red (positive) lead of the voltmeter to the wire just described it should read infinite (no resistance, OL ect.)
i don't have a wiring diagram i'll see if i can scrounge one up if needed.
Last edited:
