CAMARO TONNEAU PANEL RELEASE ELECT. DIAGNOSIS

VEHICLES AFFECTED: 1987-89 CAMARO CONVERTIBLES

SERVICE MANUAL UPDATE

The attached pages provide "Tonneau Panel Release" electrical diagnostic information not currently available in Service Manuals.

TONNEAU PANEL RELEASE

TROUBLESHOOTING HINTS

- Try the following check before doing the System Diagnosis.

1. Check ACC Fuse bu operating Cigar Lighter.

2. Check Deck Lid Limit Switch for continuity and proper adjustment.

3. Check that the Deck Lid is fully closed.

- Go to System Diagnosis for diagnosis test.

SYSTEM DIAGNOSIS

- Do this test below if the Tonneau Release does not operate.

TONNEAU RELEASE TEST (TABLE 1)

Connect: TEST LAMP At: RELEASE SWITCH CONNECTOR (Connected)

For Diagnosis Connect Correct Of Incorrect Between Result Result ------- ------- ------------- C1 (ORN) Lamp See 1 & Ground Lights ------------------------------------- - Operate Release Switch ------------------------------------- C2 (BRN) Lamp See 2 & Ground Lights --------------------------------------

- If test results are correct, go to Table 2.

1. Check for an open in ORN (40) wire.

2. Replace Release Switch.

TONNEAU RELEASE TEST (TABLE 2)

Connect: TEST LAMP At: RELEASE SWITCH CONNECTOR (Connected)

For Diagnosis Connect Correct Of Incorrect Between Result Result ------- ------ ----------- 1 (BRN) 1/2 amp See 1 & Ground Lights ------------------------------------- 1 (BRN) Lamp See 2 & 3 (YEL) Lights ------------------------------------- 2 (BLK) Lamp See 3 & Ground Lights -------------------------------------

- If test results are correct, go to Table 3.

1. Check BRN (900) wire for an open.

2. For automatic transmission check YEL (5) wire for an open (see schematic). For manual transmission: check YEL (5), TAN/WHT (33) wires and Parking Brake Switch for opens (see schematic).

3. Replace the Hatch Release Relay.

TONNEAU RELEASE TEST (TABLE 3)

Connect: TEST LAMP At: RELEASE SOLENOID CONNECTOR (Disconnected) Condition: - Press and hold Release Switch - Deck Lid fully closed

For Diagnosis Connect Correct Of Incorrect Between Result Result ------- ------- ------------ BLK (142) Lamp See 1 & Ground Lights --------------------------------------- - If test results are correct, replace the Release Solenoid.

1. Check BLK (142) wire for an open.

2. Check Deck Lid Limit Switch for proper adjustment.

CIRCUIT OPERATION

Voltage is applied at all times through the ACC fuse to the Release Switch. With manual transmission, when the Release Switch, Parking Brake Switch and the Deck Lid Limit Switch are closed, current flows through the Hatch Release Relay coil. The relay operates and voltage is applied to the Release Solenoids. The solenoids operate and the tonneau panel opens. With automatic transmission, current flows through the Hatch Release Relay coil with the Release Switch closed, the Deck Lid Limit Switch closed and the Gear Selector Switch in PARK or NEUTRAL. The relay operates and voltage is applied to the Release Solenoids. The solenaids operate and the Tonneau Panel open.

General Motors bulletins are intended for use by professional technicians, not a "do-it-yourselfer". They are written to inform those technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions and know-how to do a job properly and safely. If a condition is described, do not assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See a General Motors dealer servicing your brand of General Motors vehicle for information on whether your vehicle may benefit from the information.