Test 4: Circuits 15 & 15R

Using Adapter (140 589 12 63 00), connect Breakout Box (129 589 00 21 00) to combination control module. See Figure. With ignition switch in ACC position, measure voltage between ground and terminal No. 3 at breakout box. Battery voltage should exist. With ignition in RUN position, measure voltage between ground and terminal No. 58 at breakout box. Battery voltage should exist. If voltage is not as specified, check wiring. See WIRING DIAGRAMS .