However, I can guide you towards finding it:
Common Locations:
* Rear Bumper: The most common location for a trailer wiring harness is near the rear bumper, often behind a small cover or access panel.
* Inside the Tail Light Assembly: Look for a small, rectangular connector inside one of the tail light assemblies.
* Under the Cargo Area: Check under the rear cargo area, possibly near the spare tire well or along the frame rails.
* Inside the Driver's Side Tail Light: It might be hidden behind the driver's side taillight assembly, which is often a common spot.
How to Find It:
1. Look for a 4-prong or 7-prong connector: The wiring harness typically ends in a connector with multiple pins.
2. Use a wiring diagram: Consult your owner's manual or a wiring diagram for your specific 1990 Chevy G20 model. This will provide the most accurate information on the wiring harness location.
3. Look for labels: If your vehicle has an existing trailer wiring harness, it may have labels or markings near the connector.
4. Trace the wires: If you can find the tail light wiring, you may be able to trace the wires back to the trailer harness.
Important Tips:
* Be careful when handling electrical components: Disconnect the battery before working on the wiring harness.
* Use a test light: If you are unsure, use a test light to determine which wires are connected to the trailer wiring harness.
Professional Help:
If you are still having trouble locating the wiring harness, it's always a good idea to consult a professional mechanic. They can diagnose and repair any issues with your vehicle's trailer wiring.
