Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Instrument Cluster
Instrument cluster includes a speedometer, tachometer, fuel gauge, oil pressure gauge, water temperature gauge, voltmeter and a series of warning lights.
Powertrain Control Module (PCM) sends signals necessary for instrument cluster to position gauges. Instrument cluster receives these messages from bus and translates them into gauge positions. BCM sends status of all indicator lights and dimming level to instrument cluster over bus when ignition switch is in RUN or START positions. Malfunction indicator light (CHECK ENGINE) status is sent to BCM from PCM over bus. Vacuum florescent odometer/trip display works when ignition switch is in RUN or START positions. BCM stores mileage information that odometer displays. If bus is not functioning, odometer will display dashes instead of the mileage. BCM sends mileage message and dimming level message to vacuum fluorescent display when ignition switch is in the RUN position. All other instrument cluster features only work when the ignition switch is in the RUN position.
NO RELATED
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra cost to you.
When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.