Yes, a bad battery can cause all dash lights to flash in a 2004 Toyota Solara. When the battery is failing or unable to provide sufficient voltage, it can lead to irregular electrical signals, triggering the dashboard warning lights. Additionally, a weak battery may not support the vehicle's electrical systems properly, causing erratic behavior in the dashboard indicators. It's advisable to check the battery and charging system if you experience this issue.
Do you mean What does it mean when the brake and battery lights come on in when it is already started? Check your alternator may be its not working well it cause the battery sign comes out.
Alternator has/is going bad.
witch lights
1990 toyota celica when jumper cables are hooked up dash lights turn on but the car won't turn over won't even click
Bad bulbs can be the cause of your reverse lights not working on your 1999 Toyota Tacoma. A problem with the reverse switch or bad wires can also be the cause of your reverse lights not working.
possibly
Bad wiring can cause a short in the radio. Bad battery will not.
Dead cell in the battery or the ignition or lights were left on.
Fuses
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A short circuit.
water in the wiring or a low battery