On a 2002 Toyota Tacoma The dash board brake indicator goes on and off driving on rough road what would cause this?
Answer 1 Check mastercylinder brake fluid reservoir to make sure
it's full. Although I'm not familiar with your make and model. the
cause which you ask about is probably as alluded to in the above
previous answer, in that the brake fluid reservoir is low on fluid.
Many later model vehicles have a low fluid level sensor in the
brake fluid reservoir which triggers the warning light in the
instrument panel in order to remind the driver to have the brake
system checked. When the fluid level gets down to just above
the "trigger" level, although the light generally stays "off,"
sloshing of the fluid during movement of the vehicle can cause to
light to turn on and off intermittently.j3h.