Ground Circuits
- Turn ignition off. Using DVOM, touch negative lead to ground. Using positive lead, backprobe each control unit ground terminal. See CONTROL UNIT GROUND TERMINAL IDENTIFICATION table. Resistance should be zero ohms. If resistance is not zero ohms, repair open to ground.
- Using DVOM, touch negative lead of voltmeter to a good ground. Touch positive lead of voltmeter to each ground terminal. With engine running, voltmeter should indicate less than one volt. If voltmeter reading is greater than one volt, check for open, corrosion or loose connection on ground lead.
CONTROL UNIT GROUND TERMINAL IDENTIFICATION
| Application | Wire Color | ||
|---|---|---|---|
| Justy | |||
| Carbureted | |||
| Terminal No. 12 | Black/Red | ||
| Terminal No. 16 | Black | ||
| Terminal No. 17 | Black | ||
| PFI | |||
| Terminal No. 1 | Black/Red | ||
| Terminal No. 1 | Black/Green | ||
| Terminal No. 2 | Black/Green | ||
| Terminal No. 10 | Black/Red | ||
| Terminal No. 13 | Black/Blue | ||
| Terminal No. 26 | Black/Blue | ||
| Legacy | |||
| Terminal No. 11 | Black/Red | ||
| Terminal No. 14 | Black/White | ||
| Terminal No. 15 | Black | ||
| Terminal No. 22 | Black/Red | ||
| Terminal No. 24 | Black/Yellow | ||
| Terminal No. 25 | Black/Yellow | ||
| Loyale | |||
| Terminal No. 9 | Black | ||
| Terminal No. 30 | Black/Red | ||
| Terminal No. 35 | Black | ||
| Terminal No. 42 | Black/Red | ||
| Terminal No. 44 | Black/Red | ||
| Terminal No. 50 | Black/Yellow | ||
| Terminal No. 51 | Black | ||
| SVX | |||
| Terminal No. 5 | Black/Red | ||
| Terminal No. 11 | Black/Red | ||
| Terminal No. 14 | Black/White | ||
| Terminal No. 22 | Black | ||
| Terminal No. 24 | Blue/Black | ||
| Terminal No. 25 | Black/Yellow | ||