This section covers the MSD RPM Activated Switch, PN 8950, and the Window Switch, PN 8956. The PN 8950 will activate a circuit at a desired rpm by supplying or removing ground. The PN 8956 Window Switch will activate a circuit by supplying ground, then will deactivate the same circuit at a different rpm.
The MSD Switches are capable of switching approximately 2 amps continuously. If too much current or the circuit heats up over time, the Switches will shut off to prevent damage. For circuits that require more current for an extended time, MSD recommends a Relay. Page 84 shows a relay wiring example.
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