Section 28 (Instrument Panel - Analog): Testing: Tachometer
WARNING: This page is about a different car, the 1994 Pontiac Bonneville. However, it is still accessible from the selected car via links, so may be relevant.
- Disconnect Electronic Ignition (EI) connector (V6) or Engine Control Module (ECM) connector C2 (4-cylinder). Plug Instrument Panel Tester (J 33431) into a wall outlet. Connect Harness Connector (J 33431-10) between tester and EI terminal "E" (White wire) or ECM connector C2 terminal B11 (White wire). Set tester controls to ON, 60 Hz, and 54 MPH.
- If tachometer reads 1350 RPM (V6) or 1800 RPM (4-cylinder), check for clean and tight connections at EI or ECM. If connections are okay, replace EI or ECM. If tachometer does not read 1350 RPM (V6) or 1800 RPM (4-cylinder), check White wire for an open or short circuit to ground. If wire is okay, replace IPC.