Power Circuits

Turn ignition switch to ON position. Using a voltmeter, check for battery voltage between chassis ground and ECM terminals as follows:
- Terminals No. 24, 67 and 72. See Figure or Figure .
If battery voltage is not present, check fusible link and fuse "G".
Turn ignition switch to OFF position. Using a voltmeter, check for battery voltage between chassis ground and ECM power back-up terminals as follows:
- Terminal No. 80
If battery voltage is not present, check for overheated relays, fusible links and wiring.