You cannot test the cruise control switch until you take it apart from the dashboard. Plug the ohmmeter into its diagram and test for easy current flow from the switch terminals to the diagram's lettered points in different switch positions. When you check for bulbs and find one doesn't work, replace only that bad bulb. When you don't get the indicated connectivity, the switch needs to be replaced. Open the dashboard, pull the switch out, and detach its electrical wires before you can take it out of the car. Installation is the reverse of removal. To take out the rear defogger switch on lntegra cars, detach it from inside the instrument panel. Use your ohmmeter or test lamp in the right way, following this picture, to see if there's an electrical connection between the given switch terminals, controlling where you move the switch. If your light test shows no power, just replace the damaged bulb. When the switch does not match the requirements, replace it right away. Pin the switch off from the instrument panel carefully while unplugging its electric connection. Installation is the reverse of removal. Take off the instrument panel lights dimmer switch from its spot on the panel. Because the control parts are inside the switch, regular testing tools don't work. Check the switch terminals for damage; fix them if you can, but replace the unit if needed. Use an ohmmeter to check continuity by connecting a good chassis to terminal no. 2. When the headlight switch is on, attach one lead of a voltmeter to terminal no. 1 and the other to ground to see if there's battery voltage at the poles. When you turn the ON position on the headlight switch, join one end of a connecting wire to terminal no. 3 and the other end to a solid metal part of the car; all the instrument panel lights should shine at full strength. When the testing showed correct readings and the switch stopped working, get a new one. Lift out the switch from the instrument panel, then take off the wiring plug to disconnect it. Installation is the reverse of removal.
