Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
SYS.OK|MANUAL.DB● LIVE
HOMESERVICE MANUALSCHEVROLET1999CORVETTE 2D COUPE, STANDARDREPAIR AND DIAGNOSISBODY & FRAMEWINDOWSPOWER WINDOW SYSTEMSYMPTOM TESTSTEST 1: LEFT WINDOW INOPERATIVE
1999 Chevrolet Corvette 2D Coupe, Standard
Test 1: Left Window Inoperative
1999 Chevrolet Corvette 2D Coupe, StandardSECTION Test 1: Left Window Inoperative
- Using scan tool, check LDCM history for DTCs. If DTC B2202, B2204 or B2274 is retrieved, perform appropriate test under DIAGNOSTIC TESTS . If no DTCs are retrieved, go to next step.
- Using scan tool, select LDCM and command left window up and down. If window operates as commanded, go to step 4 . If window does not operate as commanded, go to next step.
- Turn ignition switch to OFF position. Disconnect left window motor connector. Turn ignition switch to RUN position. Connect test light between left window motor connector terminals "A" (Dark Blue wire) and "B" (Brown wire). Using scan tool, command left window up and down. If test light illuminates with each command, go to step 10 . If test light does not illuminate with each command, go to next step 6 .
- Using scan tool, select LDCM inputs and monitor left window switch status. Depress left window switch on master switch assembly to UP position. If scan tool displays ACTIVE, go to next step. If scan tool does not display ACTIVE, go to step 7 .
- Using scan tool, select LDCM inputs and monitor left window switch status. Depress left window switch on master switch assembly to DOWN position. If scan tool displays ACTIVE, system is okay. If scan tool does not display ACTIVE, go to step 8 .
- Repair open or short in Dark Blue wire or Brown wire between left window motor and LDCM. After repair, go to step 12 . If circuits are okay, go to step 10 .
- Repair open in Brown wire or Black wire between LDCM and master switch assembly. After repair, go to step 12 . If circuits are okay, go to step 11 .
- Repair open in Gray wire or Black wire between LDCM and master switch assembly. After repair, go to step 12 . If circuits are okay, go to step 11 .
- Replace left window motor. See WINDOW MOTOR & REGULATOR under REMOVAL & INSTALLATION.
- Replace LDCM. See DOOR CONTROL MODULE (DCM) under REMOVAL & INSTALLATION.
- Replace master switch assembly. See WINDOW SWITCH under REMOVAL & INSTALLATION.
- Turn ignition switch to OFF position. Connect or install any connectors or components that were disconnected or removed. Turn ignition switch to RUN position. Clear any DTCs. See CLEARING DIAGNOSTIC TROUBLE CODES (DTCS) under SELF-DIAGNOSTIC SYSTEM. Recheck system operation.
RENDER: 1.0x
NO RELATED
Recommended Tools & Savings
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra cost to you.
When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.