Switch module test circuit design
simulate this circuit &ndash; Schematic created using CircuitLab

Figure 1. A simple test fixture.

This simple test fixture might suffice.

Switch testing:


With SW1 off about 2.5 mA will flow through D1 lighting it dimly.
With SW1 on about 13 mA will flow through D1 lighting it brightly.
With SW2 off about 2.5 mA will flow through D2 lighting it dimly.
With SW2 on about 10 mA will flow through D2 lighting it brightly.


Resistor testing:


If R1 or R3 is missing the dim test will fail.
If R2 or R4 is missing the respective LED will never light.