400 ohms is high...theoretically it should be zero...in reality, probably fluctuate around zero. The procedure is as follows...
1) Make very sure you ohmeter/voltmeter is set to measure resistance...check this by touching the probes together...you should get about zero...and (depending on meter) a beep for continuity. (Make sure to use Ohms rather than Kohms if you have the choice...because Kohms may round to zero)
2) Then put one probe on the barrel on one end...and the other on the other end...you should get about zero
3) While keeping one probe on a barrel, put the other on the pin of the other side...you should get "open" or infinite resistance...
repeat with all permutations/cables.
400 is too high...but is your meter working right?
1) Make very sure you ohmeter/voltmeter is set to measure resistance...check this by touching the probes together...you should get about zero...and (depending on meter) a beep for continuity. (Make sure to use Ohms rather than Kohms if you have the choice...because Kohms may round to zero)
2) Then put one probe on the barrel on one end...and the other on the other end...you should get about zero
3) While keeping one probe on a barrel, put the other on the pin of the other side...you should get "open" or infinite resistance...
repeat with all permutations/cables.
400 is too high...but is your meter working right?