best way to check voltage\
now that u have the info on meter place red probe to battery positive and black probe to battery negative
needle should sweep to about 12 volts. if this is correct then with ign on put black probe to battery negative and red probe to to each side of fuses. if one side reads 12+ and the other side dont then that fuse is blown.
keep in mind u will have extra fuses that will not move the meter.
u might try the accessory position if it has one?