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CONDITION POSSIBLE CAUSES CORRECTION ALL LAMPS IN THE COURTESY LAMP CIRCUIT DO NOT ILLUMINATE 1. Ineffective or missing fuse. 1. Test and replace the fuse as required. 2. Ineffective ground circuit. 2. Test and repair the open ground circuit 3. Ineffective feed circuit. 3. Test and repair the open feed circuit as 4. Ineffective cargo lamp 4. Test and replace the cargo lamp as 5. Ineffective rear courtesy lamp 5. Test and repair the shorted courtesy lamp 6. Ineffective multi-function 6. Test and replace the multi-function switch 7. Ineffective Body Control 7. Use a diagnostic scan tool to test the A SINGLE LAMP IN THE COURTESY LAMP CIRCUIT DOES NOT EXTINGUISH 1. Ineffective lamp switch. 1. Test and replace a map/reading lamp 2. Ineffective ground circuit. 2. Test and repair the shorted courtesy lamp ALL LAMPS IN THE COURTESY LAMP CIRCUIT DO NOT EXTINGUISH 1. Ineffective ajar switch. 1. Test and replace a door, tailgate, or 2. Ineffective ajar switch sense 2. Test and repair the shorted ajar switch 3. Ineffective ground circuit. 3. Test and repair the shorted courtesy lamp 4. Ineffective Body Control 4. Use a diagnostic scan tool to test the PANEL LAMPS DIMMER CIRCUIT CONDITION POSSIBLE CAUSES CORRECTION A SINGLE LAMP DOES NOT ILLUMINATE 1. Ineffective or missing bulb. 1. Test and replace lamp bulb as required. 2. Ineffective ground circuit. 2. Test and repair lamp ground circuit as 3. Ineffective supply circuit. 3. Test and repair open fused panel lamps A SINGLE LAMP DOES NOT EXTINGUISH 1. Ineffective supply circuit. 1. Test and repair shorted fused panel 8L - 174 LAMPS/LIGHTING - INTERIOR KJ |