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How to Clear Codes on the 1985 Toyota Truck

On-board diagnostics (OBD) computers were put into vehicles in the early 1980s to monitor and troubleshoot problems within vehicles. To clear the codes in your 1985 Toyota truck you need only an end wrench and a few moments of your time. Clearing the codes will turn off all lights such as "Check Engine" or "Service Engine Soon" from your instrument cluster. Make sure you have all repairs and servicing done before you clear the codes to allow the OBD computer to function properly.

Instructions

1

Check to make sure your ignition is completely off. Then pull the hood release lever.

2

Locate the battery under the hood. Find the negative terminal on the battery. Look for a retaining nut attached to the clamp and loosen it using the end wrench.

3

Slip the clamp off of the negative terminal, taking care to keep it away from the positive side of the battery.

4

Wait a minute and then put it back on the negative terminal. Tighten the nut with the end wrench. Lower the hood.

5

Put the key into the ignition and start the truck. Look on the instrument panel to make sure all the lights are off.