rvangaalen

Challenger 1800 1998 model.
Fuel gauge stop working during first run this year.
How do I check the fuel gauge & fuel tank senor ?
Three wires to fuel tank show no continuity through any combination.
Voltage a the meter --purple 11.8v, pink & pink-blk 5.7 & drops to 4.9.

Which meter wires can I use the check operation & what voltage.
Does any one have a schematic ?

Thanks in advance