Smoke coming from under the dashboard

Symptoms

• Smoke, haze, or a burning smell coming from the dashboard area, sometimes near vents or the steering column
• Possible flickering lights, dead electrical accessories, or a tripped fuse alongside the smoke
• Acrid, distinctly electrical/plastic smell rather than an oil or exhaust smell
• May follow recent aftermarket accessory installation (stereo, lights, dash cam wiring)

Likely causes

• CommonElectrical short circuit in the dash wiringA pinched, chafed, or improperly installed wire (including from aftermarket accessories) can short and overheat, producing smoke.
• CommonOverheating blower motor or resistorA failing blower component can get hot enough to smoke and melt nearby plastic.
• PossibleOverloaded circuit from an aftermarket accessoryEquipment not wired to the correct gauge or fused properly can overheat under load.

What to do

1. Turn off the vehicle immediately (engine and accessory power) and, if safe, disconnect the 12V battery to cut all power.
2. Do not attempt to keep driving or using electrical accessories once smoke is seen; exit the vehicle if the smoke or smell worsens.
3. Once safely stopped and powered down, note any recently installed aftermarket electronics, since these are common sources of dash-area electrical shorts.
4. Have a mechanic trace the wiring fault with proper diagnostic tools rather than attempting to guess at the source yourself, since dash wiring harnesses are complex.
5. Do not simply replace a blown fuse repeatedly if it keeps blowing, since that indicates an active short that needs to be found and fixed.

When to call a pro

See a mechanic (auto electrical specialist if available) promptly for any smoke from the dashboard; this should not be worked around with repeated fuse replacement.

Safety