Checking Static-Sensitive Circuits/Devices

NOTE: This article is intended for general information purposes only. Contents are generic in nature and all information may or may not apply to all vehicles.

Solid State circuits in electronic devices are shown greatly simplified in schematics. See Fig 1. Due to the simplification of the electronic devices on the schematic, resistance measurements could be misleading or could lead to an electrostatic discharge. Always follow the recommended diagnostic procedure.

Fig 1: Sample Schematic Showing Typical ESD Sensitive Device
Only measure resistance at the terminals of the devices when instructed by the recommended diagnostic procedure.
When using a voltmeter, be sure to connect the ground lead first.