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Home >> Jeep >> 1996 >> Grand Cherokee Limited, 5.2 Y >> Repair and Diagnosis >> External Pages >> Different car >> Section 208 (Diagnosis - 42RE (W/TCM)) >> Diagnostic Trouble Code Tests >> Test 17A - 12-Volt Supply

Test 17A - 12-Volt Supply

WARNING: This page is about a different car, the 1995 Jeep Grand Cherokee. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: Perform TEST 13A  or 14A before proceeding with this test. For connector terminal identification, see CONNECTOR IDENTIFICATION  . For wiring diagram, see WIRING DIAGRAM  . Perform TEST 3A - VERIFICATION TEST  after each repair.
CAUTION: Always turn ignition switch to OFF position prior to disconnecting or connecting any module connector.
  1. Turn ignition off. Disconnect Transmission Control Module (TCM). Use external ohmmeter. Measure resistance between terminals No. E16 and F16 on TCM connector. If resistance is 30-45 ohms, replace TCM. If resistance is not 30-45 ohms, go to next step.
  2. Disconnect transmission 8-pin connector. Measure resistance between terminal No. 1 on 8-pin connector and terminal No. F16 on TCM connector. If resistance is less than 5 ohms, repair open 12-volt supply circuit on harness inside transmission. If resistance is 5 ohms or greater, repair open 12-volt supply circuit from TCM to transmission 8-pin connector.
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