gas gauges

[Ron]

I have a 1984 F32 Fly bridge. The fuel gauges are located at the lower station. The 2 gauges for the 2 gas tanks on the starboard side read ok, but the 2 gauges for the 2 tanks on the port side don't read at all. Any ideas on how I should trouble shoot this?
Thanks in advance any and all help

[TADTOOMUCH]

First you need to determine if the wiring has continuity between the wire at the top of the tank and the Gauge. You will need a long piece of wire with alligator clips at each end and a multimeter to test for resistance (ohms) and voltage. Clip the alligator clip on to the wire that goes to the tank after removing it from the tank. Then test for resistance between the other end of the wire and the wire that is attached to the gauge that is marked with an S or that has a tan wire attached to it. You should read zero resistance or very low ohm resistance. The test wire might have some resistance. Next you need to test that the gauge is getting voltage from the battery with the key on. Just read the voltage from the gauge from the orange wire to the white ground wire in the panel. Should be around 10 to 13 volts. Next you need to test that the gauge will move if you determined there is voltage to the gauge. Just touch a wire from the tan wire on the back of the gauge to a ground on the gauge and the needle should move from E all the way to F if it is working right.

Any of the above not working then replace the gauge.

If all the above works then the fuel sending unit needs to be checked.

You can measure the resistance between the sender and any ground on the engine block at Full and should read lower resistance than at near empty. Zero resistance means the sender is bad and should be replaced.

[Stripermann2]

You can try this, hope this helps.

http://ww2.tflx.com/pdf/marfue%7E1.pdf