Introduction
If you own a Land Rover Discovery 3, you know the air suspension system is fantastic—until it fails. Installing a replacement Discovery 3 air compressor without testing it first can lead to hours of frustration. In this guide, we’ll show you how to test a replacement compressor safely and efficiently before installation.
Why Pre-Testing Matters
Testing your Discovery 3 air compressor before installation helps you:
- Confirm the compressor works properly
- Avoid error codes in your vehicle
- Prevent the hassle of removing and reinstalling a faulty part
All you need for a basic test is:
- Airline connection
- Power supply for motor and solenoids
- Optional: solenoid or temperature sensor connections
Step-by-Step Testing Guide
- Remove the bottom cover
- There are two 10mm bolts at either end of the compressor cover.
- Unclamp and remove the bottom cover.
- Disconnect the small air line
- Use a 12mm spanner to undo the black air line.
- Disconnect electrical plugs
- Undo the motor power plug and the solenoid plug.
- Use the bottom cover as a stand
- Place the replacement compressor on the bottom cover to avoid stretching the air line.
- Reconnect essentials
- Plug in the air line, motor power, and solenoid plug.
- Test in the car
- Hop in and cycle the air suspension.
- Ensure there are no error codes and listen for proper air pressure.
Tips for Smooth Testing
- Always test before full installation.
- Avoid twisting or overstretching air lines.
- Confirm electrical connections are secure.
Takeaway
Pre-testing a replacement Land Rover Discovery 3 air compressor is quick and prevents hours of frustration. Verify that the part works before committing to installation, saving time and effort.
Tested and Ready to install? Here is a quick way to get the old compressor out and the new one in.
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