I have a RB MDC2 controller that shows a short circuit. I have identified which pair of wires the fault is on. I need to pick up a clamp meter to help with the troubleshooting. What kind of meter do you like? This is the first problem I have ran into with the two wire systems. I have read some of threads here and it does not seem like it will be too complicated. If any of you have any tips they would be greatly appreciated!