Abstract: Technologies are disclosed for contingency vehicular signaling. A first DC power source may be connected with one or more indicators. The first DC power source may be connected with a second DC power source, and/or a third DC power source, via a semiconductor. The first DC power source may be configured to receive a second DC current flow from the second DC power source, and/or a third DC current flow from the third DC power source. The semiconductor may be configured to block a first DC current flow from the first DC power source to the second DC power source, and/or the third DC power source. The first DC power source may be configured to provide the one or more indicators with the first DC current flow via the at least one electrical switch regardless of a magnitude of the second DC current flow, and/or the third DC current flow.