Method 1: Using a Jumper Wire (Most Common)
1. Locate the Diagnostic Connector: This is usually under the dashboard, near the steering column. It's a rectangular connector with multiple pins. It may be a single connector or a part of a larger connector block. Consult your owner's manual for the precise location; this is the most crucial step.
2. Identify the pins: You need to locate the pins for the diagnostic connector that need to be connected for this procedure. *This is where your owner's manual is critical*. Commonly, you'll need to connect pins labeled "TE1" and "E1" (sometimes represented as numbers instead of letters). Again, your owner's manual will tell you the correct pins.
3. Prepare the Jumper Wire: Use a short length of insulated wire, with alligator clips at each end.
4. Connect the Jumper Wire: Connect one alligator clip to the TE1 pin and the other to the E1 pin (or the equivalent pins from your manual). You should be turning the key *to the "ON" position,* NOT starting the engine.
5. Monitor the Check Engine Light: The Check Engine light (CEL) will begin to flash a code. Each flash represents a digit. A pause between flashes separates different digits in the code. For example, a series of three flashes, a pause, and then two flashes would represent code 32.
6. Record the Codes: Carefully write down the codes as they flash. There may be multiple codes.
7. Disconnect the Jumper Wire: Once all codes have flashed, remove the jumper wire from the diagnostic connector.
8. Consult a Repair Manual or Online Database: Once you have the codes, you'll need a repair manual for your specific 1995 Isuzu Rodeo model (engine size matters) or an online database that translates Isuzu OBD I codes. These codes are often different than the OBD II codes used in later vehicles.
Method 2: Using a Flash Code Reader (Less Common, but More Convenient):
Some older OBD I scanners exist, designed to read these flashing codes directly. These are less readily available than OBD-II scanners.
Important Notes:
* Owner's Manual: Your 1995 Isuzu Rodeo's owner's manual is the single most important resource for this process. It will tell you the exact location of the diagnostic connector and the specific pins to use.
* Accuracy: The flashing code method can be prone to error. If you're unsure, consider seeking professional help.
* Safety: Always exercise caution when working with automotive electrical systems. Avoid touching any exposed metal parts or accidentally shorting anything out.
* Code Interpretation: After getting the codes, you need to find what they mean. This usually requires a repair manual specific to your year and model.
If you're uncomfortable performing this procedure yourself, take your vehicle to a qualified mechanic for diagnostic testing. They have the proper tools and expertise to accurately diagnose the problem.
