Unusual warning lights

Hi everyone. New guy here. 2010 Tacoma Pre-Runner (2wd). 100k miles

About 4 days ago my instrument panel started displaying idiot lights for brakes, ABS, and skid control all at the same time. When I put the truck away for the night there were no lights displayed. The next morning they came on and stayed on for about 15 miles and then they went out. After about another 5 or 10 miles they came back on. This on-and-off routine has been repeating randomly for the past 4 days. This, to me, indicates some kind of faulty sensor or loose electrical or electronic connection somewhere rather than faulty braking equipment. But I'm not a Toyota technician either. I have not had an opportunity to test the ABS or the skid control yet but my brakes seem to be working good. This is a very busy time here on the farm and time is precious. Our equipment cannot stay in a shop over night.

Any ideas on what the problem is? Suggestions on what to do to remedy this situation?

 

Check fuse box grounds

 

Is the check engine light also on? If so then it's a engine/emissions related issue? If the CEL is not on, then it's a brake system issue. Could be anything from low brake fluid to flaky wheel speed sensor/wiring. Only way to diagnose is plug in a good scan tool to read the brake system codes.

 

Wheel speed sensor.

 

Get all technical while the rest of us are asking hey did you smack the top of the dash

 

Are they really lighting or is something grounding back through that circuit .

 

check your brake fluid level?

 

Thanks everyone. Yep, I checked the fluid level when I first saw the lights come on. And I'm pretty sure the lights are actually coming on because they all three come on instantly (whenever I catch them coming on or off) and they do not flicker at all. It seems to me that a faulty ground or wiring would make them flicker slightly. I have a friend who has a good code reader and he is coming to take a look this coming week. I removed all four wheel speed sensors for a visual inspection Friday but there was no obvious issues and I didn't know what to look for anyway.