Mechanics

ENGINE CODES

1991 Ford Ranger

Electrical problem
1991 Ford Ranger 4 cyl Two Wheel Drive Manual 300, 00 miles

how do I manually retrieve codes from my ranger I have the test light I just need the procedure and how to read
Avatar
Rangerdanger17
February 10, 2009.




See below


http://www.2carpros.com/forum/automotive_pictures/12900_ford1_1.jpg




http://www.2carpros.com/forum/automotive_pictures/12900_ford_reading_codes_1.jpg


Tiny
Rasmataz
Feb 10, 2009.
EQUIPMENT HOOKUP
Apply parking brake, and place shift lever in Park (A/T) or Neutral (M/T). Block drive wheels. Turn off all electrical loads. Connect appropriate test equipment to vehicle as follows.
Analog Volt-Ohmmeter (VOM)
1) Turn ignition switch to OFF position. Set VOM at 0-15V DC range, and connect positive lead of VOM to positive battery terminal.
2) Connect negative VOM lead to Self-Test Output (STO) terminal of self-test connector. See Fig. 2 . Connect timing light, and go to KOEO SELF-TEST. Activate KOEO SELF-TEST by connecting jumper wire from Self-Test Input (STI) pigtail to signal return terminal of self-test connector with ignition on.
"Scan" Tool
Follow manufacturer's instructions to hook up equipment and record service codes.
STAR Series Tester
Turn ignition to OFF position. Connect color-coded adapter cable leads to diagnostic tester. Connect 2 service connectors of adapter cable to vehicle self-test connector and STI pigtail connector. Connect timing light. Go to KOEO SELF-TEST.
"CHECK ENGINE" Or "SERVICE ENGINE SOON" Light (MIL)
With ignition on, connect a jumper wire between Self-Test Input (STI) pigtail and signal return terminal of self-test connector. No additional special equipment hookup is required.


http://www.2carpros.com/forum/automotive_pictures/266999_sti_1.jpg

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Dave H
Feb 10, 2009.

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