How to Test for System Wide Opens
Simple DIY Cable Continuity Tester under Repository-circuits
Never play the guessing game with cables again. Featuring a simple 5-way switch to test every pin, even with mismatched connectors, the battery-powered MTEST-1 is an essential tool to have in your bag for every gig. You can even manually test continuity between any two points with the included probes.
Mackie MTest-1 Cable Tester
RJ11 Network Audio Cable Tester XLR Test Tool for RCA BNC TRS JACK
Wire Test Harness Continuity Cable Connector Wire Sequence
Palmer Cable Tester – Thomann UK
Kopul CBT-MF Multi-Function Cable Tester with Dual Chassis
How to test an audio cable with a multimeter - Quora
How to Test a Speaker
G128N Cable Continuity Tester, Cable Misplacement, Short Circuit
The OSP CT-04C Premium Cable Tester easily checks the connection and continuity of XLR mic cables, TRS instrument cables, Speaker cables, Speakon (2, 4, and 8 pole) cables, MIDI cables, 1/8 TRS (3.5mm), RJ45 CAT5e, USB, DIN, 3 Pin and 5 Pin DMX. Just plug each end of your cable into the appropriate connections and turn the knob to check each pin connection. LED's confirm each conductor continuity and connection status of each wire. Works off of a standard 9V battery not included.
OSP CT-04C Cable Tester
Basic Electric CONTINUITY TESTER : 8 Steps (with Pictures