Firebird V8-350 5.7L VIN P SFI (1996)
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Wiper
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Charging System (hidden in wire harness)
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Parking Brake (vehicle with ABS)
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Relays
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Solenoids
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Diesel Glow Plug Circuit
General Information
OPEN CIRCUIT
An open circuit is an incomplete circuit. Power cannot reach the load or reach ground. If a circuit is open, active components do not energize.
SHORT CIRCUIT
A short circuit is an unwanted connection between one part of the circuit and either ground or another part of the circuit. A short circuit causes a
fuse to blow or a circuit breaker to open.
Heated Oxygen Sensor (O2S) Repair
If the Heated Oxygen Sensor pigtail wiring, connector or terminal is damaged, the entire Oxygen Sensor Assembly must be replaced. Do not attempt to
repair the wiring, connector or terminals. In order for the sensor to function properly, it must have provided to it a clean air reference. This clean air
reference is obtained by way of the Oxygen Sensor signal and heater wires. Any attempt to repair the wires, connectors or terminals could result in the
obstruction of the air reference and degraded Oxygen Sensor performance.
The following guidelines should be used when servicing the Heated Oxygen Sensor:
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Do not apply contact cleaner or other materials to the sensor or vehicle harness connectors. These materials may get into the sensor causing poor
performance. Also the sensor pigtail and harness wires must not be damaged in such a way that the wires inside are exposed. This could provide a
path for foreign materials to enter the sensor and cause performance problems.
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Neither the sensor or vehicle lead wires should be bent sharply or kinked. Sharp bends, kinks, etc., could block the reference air path through the
lead wire.
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Do not remove or defeat the Oxygen Sensor ground wire (where applicable). Vehicles that utilize the ground wired sensor may rely on this ground
as the only ground contact to the sensor. Removal of the ground wire will also cause poor engine performance.
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To prevent damage due to water intrusion, be sure that the peripheral seal remains intact on the vehicle harness connector.
The Engine Harness may be repaired using Packard's Crimp and Splice Seals Terminal Repair Kit J 38125-A. Under no circumstances should repairs be
soldered since this could result in the air reference being obstructed.
OBDII Circuit Repairs
Repairs for On-Board Diagnostics II (OBDII) emission control circuits follow the procedures stated in TYPICAL ELECTRICAL REPAIR
PROCEDURES. When servicing OBDII circuits, the following guidelines are also essential:
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Do not move or alter grounds from their manufactured locations.
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Do not tie aftermarket accessories into OBDII circuits.
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Only repair OBDII circuits in accordance with the manufactured configuration.
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Always replace a relay in the OBDII circuit the same replacement part. Damaged relays should be discarded, not repaired.
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Refer to Fuseblock Details to identify OBDII circuit fusing. See: Power and Ground Distribution
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Make sure the CPA (connector position assurance) locks and TPA (terminal position assurance locks are reinstalled on connectors that use them.
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After repair of connectors or connector terminals, make sure to achieve proper terminal retention. Refer to Repairing Connectors. for procedures.
See: Wire Repair Procedures/Typical Electrical Repair Procedures/Repairing Connectors
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Before repairing OBDII heated oxygen sensors and related wiring, always review the special repair guidelines provided in Heated Oxygen Sensor
Repair. See: Wire Repair Procedures/Typical Electrical Repair Procedures/Heated Oxygen Sensor (O2S) Repair
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When installing an electrical ground fastener, be sure to apply the specified torque. Ground torque specifications are listed in Ground
Distribution. See: Power and Ground Distribution
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After repair of connectors, make sure to reinstall connector seals, where used. Inspect seals for wear and damage. Replace worn or damaged seals.
General Information
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The following general repair procedures can be used to repair most types of connectors. The repair procedures are divided into three general
groups: Push-to-Seat, Pull-to-Seat and Weather Pack(R).
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Use the proper Pick(s) or Tool(s) that apply to the terminal.
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The Terminal Repair Kit (J 38125-A) contains further information.
Push-to-Seat and Pull-to-Seat Connectors
