Is the RADIO (15A) circuit breaker fed generally from the battery side of the battery knife switch, or are some EMD models one way and on others the breaker is connected like most other breakers on the circuit breaker panel?
Golden Arm: You'll get a kick out of this one.
I was working on a short line railroad in Mississippi. We had some wide-cab GP40s (originally CN) the railroad had acquired third-hand. This railroad used them for power on locals.
I went to pick up a local at an outlying point. There was a wide-cab GP40 (GP40W?) on the point.
It was my first time running one of those. But on making my inspection, something was apparently wrong with the radio.
The radio would not work unless the headlight was turned on. OK, but....if the headlight was on low, the radio would receive but not transmit. If the headlight was on high, the radio would both send and receive.
Les