70-7992 - Car accessory Metra - Free user manual and instructions
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| Product Type | Car audio wiring harness for aftermarket radio installation |
| Brand | Metra |
| Model Number | 70-7992 |
| Compatibility | Select vehicle applications, typically Nissan models |
| Primary Function | Connects an aftermarket head unit to the vehicle's factory wiring harness |
| Connector Design | Plug-and-play with factory female connectors |
| Terminal Type | Pre-crimped metal terminals with color-coded wires |
| Wire Gauge | 16 AWG for power and ground, 18 AWG for speaker leads (typical) |
| Length | Approximately 12 inches (30 cm) of lead wire |
| Operating Voltage | 12V DC (negative ground systems) |
| Current Rating | Up to 10A for constant power circuits |
| Material | High-temperature CCV insulation, tinned copper conductors |
| Installation Method | Direct solder or crimp connections; includes quick-disconnect plugs |
| Additional Features | Resists corrosion; vibration-proof locking tabs |
| Maintenance | Inspect annually for loose connectors; clean with dry cloth only |
| Safety Notice | Disconnect vehicle battery negative terminal before installation |
| Serviceability | Replacement part, no user-serviceable internal components |
| Package Contents | 1x wiring harness adapter, 1x instruction sheet |
| Certifications | Meets ISO 10457-1 connector standards |
Frequently Asked Questions - 70-7992 Metra
What is the Metra 70-7992 wiring harness used for?
It is designed to connect an aftermarket car stereo to the factory wiring of specific vehicle models, ensuring a plug-and-play installation without cutting wires.
Which vehicles are compatible with this harness?
This harness is typically compatible with select Nissan vehicles from the early 2000s to the 2010s. Always verify fitment with your vehicle's year and trim before purchasing.
Does this harness include an instruction manual?
Yes, a 2-page installation guide is included, detailing wire functions and connection steps. It is also available for download in PDF format.
Can I install this harness without professional help?
Yes, if you have basic knowledge of car audio wiring and use proper tools. The connectors match the factory plugs, but you still need to connect the aftermarket radio wires to the harness leads.
What are the wire colors and their functions?
Typically, the harness uses standard aftermarket color codes: yellow for constant power, red for ignition power, black for ground, and gray/green/white/purple pairs for speaker wires. Refer to the included manual for exact color mapping.
Is the harness compatible with a stock amplifier?
In most vehicles, it bypasses the factory amp if one is present. However, some premium audio systems may require an additional amplifier integration adapter. Check the manual or compatibility chart.
What if a wire is damaged or a terminal is loose?
Since it is a complete replacement part, do not attempt to repair individual terminals. Order a replacement unit from the manufacturer or an authorized dealer.
Can I use this harness with a non-Nissan vehicle?
No, the 70-7992 has a vehicle-specific connector and is designed only for the intended vehicle models. Using it elsewhere may cause improper wiring or damage.
How do I clean or maintain the harness?
Disconnect the harness from the vehicle and wipe it with a dry lint-free cloth. Do not use chemical solvents or water. Reinstall after it is fully dry.
What safety precautions should I take during installation?
Always disconnect the negative battery cable before starting to avoid short circuits. Verify that the radio's power antennas are connected correctly and use appropriate wire connectors or solder for reliable joints.
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USER MANUAL 70-7992 Metra
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Product information
Brand : Metra
Model : 70-7992
Category : Car accessory