Control Unit - Ground Circuits Test
Using a DVOM, touch negative voltmeter lead to a good ground. Touch positive voltmeter lead to each ground terminal. With vehicle 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. See ECM GROUND LOCATION table for ECM ground location.
ECM GROUND LOCATION
| Application | Location |
|---|---|
| Amigo & Pickup | Right Side of Intake Manifold |
| Impulse | Left Side of Upper Intake Manifold |
| Trooper 2.6L | Right Side of Intake Manifold |
| Trooper 2.8L | Right Side, Below Intake Manifold |