Test 27, Check Pip EEC Circuit For Short To VBAT
WARNING: This page does not describe the selected car, but rather 11 other vehicles, including the 1991 Ford Ranger, 1991 Ford RV Cutaway, 1991 Ford Pickup, 1991 Ford F-Super Duty, and 1991 Ford Explorer. However, it is still accessible from the selected car via links, so may be relevant.
With key off, disconnect diagnostic cable connector from DIS module (Pins No. 1-6). See Figure. Connect LED test light between breakout box pins No. (+) J31 (PIP EEC) and (-) J60 (BAT -). Turn key on. If test light does not illuminate, go to next test. If test light illuminates, PIP EEC is shorted to BAT. Check connectors, repair or replace harness and check for fault codes. If vehicle still does not start, go to next test.