Diagnosis And Testing - Sunroof Switch
- Disconnect and isolate the battery negative cable.
- Remove the power sunroof switch from the headliner. Refer to SWITCH, SUNROOF, REMOVAL .
- Disconnect the sunroof wire harness connector from the sunroof switch connector receptacle.
- Using a multimeter, test the continuity between the terminals of the sunroof switch connector receptacle while actuating the switch as shown in the Sunroof Switch Tests chart
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SUNROOF SWITCH TESTS SWITCH POSITION CONTINUITY BETWEEN PINS OFF NO CONTINUITY CLOSE 1 and 2 OPEN 1 and 3 SWITCH ILLUMINATION LED - SET MULTIMETER TO DIODE MODE - CONNECT PIN 4 TO PLUS (+), CONNECT PIN 1 TO MINUS (-) - LED SHOULD BARELY GLOW - If the switch fails any of the tests, replace the ineffective switch.