If you are getting a 1 on your meter, it means you are off scale... ie. the value of resistance is too high, meaning you have no continuity. If the meter doesn't beep or you get a '1,' hold your test leads together. If it beeps or reads '0' with your leads together, it means you have no continuity.
try a different ground ie. try a different bolt - door latch works fine, or chasis where there is no paint.
if still no 'beep' then you'll have to wear it and find where the wire goes, follow it if you don't have a circuit diagram and check for any cuts, nicks, making sure it hasn't been pulled out of it's terminal etc.
my guess is if it's meant to have continuity to ground, then maybe you could cut into that wire and connect it to a fresh ground. Do not ground the cable if it is a positive wire, coz then you'll blow a fuse or worse, start a fire
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