To verify the operation of the dimmer switch the following steps need to be followed; first is to disconnect the steering column by removing the cover and also pull the electrical connector of the switch. Continuity can be tested using an ohmmeter between the switch terminals; between the B and H terminals should show continuity in the high beam position and between the B and L terminal in the low beam position. Otherwise they need to be replace This might be due to the absence of continuity existed and hence the switch has to be replaced. For replacement, unbolt the two bolts to bring the switch down from the steering column, then put the new switch in its proper position, and screw in the bolts to fit hand tight. Make an adjustment pin out of a piece of wire/ Disengage this switch to the rear so that there is no unnecessary play on the actuator control rod/ Then it is time to tighten the bolts. Finally and last, take the pin; connect the connector as it is shown above; and replace the steering column cover.