Checking Ground-Providing Circuits
WARNING: This page is about a different car, the 2020 Ford F-150. However, it is still accessible from the selected car via links, so may be relevant.
The best method of checking ground circuits is to measure the circuit voltage drop during component operation (or attempted operation).
- An ohmmeter may be accurately used if the battery has been disconnected.
- Expect less than 2 ohms for most small diameter (18 gauge and smaller) wires.
- Disconnecting the battery is critical because DMM ohmmeter readings are commonly corrupted by the normal voltage present (battery connected) across body and chassis ground circuits.