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Reading and Clearing Diagnostic Trouble Codes
1985 & 1988
Trouble code are set in the ECM memory whenever a system malfunctions is encountered during normal driving operation. To prevent loss of trouble codes when the
ignition switch is turned off, a fused battery feed feed is connected to the ECM.
To clear trouble codes, remove ECM fuse from fuse panel. After approximately 10 seconds, reinstall fuse.