because there is no power going to one side of the fuse test it for power with a tester without the fuse inplace
thong
check the fuses in the fuse box first
junk it
first check the bulbs then the curcut then the fuses on the fuse board
no gas
Switch most likely.
try the starter relay.
Sounds like starter or neutral switch to me.
What car & engine???? Check injector connectors with noid lights, ensure all fuses are good, is there good compression?
Start with checking the fuses.
There are two flashers, one for the hazards and one for the signals.
have you tryed all the fuses then check if the bulbs are good