I have an 01 tacoma. Left turn signal goes on, step on the brake, signal stops. No signal on, step on the brakes, left front marker comes on. Highway speed on cruise control, hit the left turn signal cruise shuts off. Now the abs light is intermittent. Any ideas where to start lookin? Thanks!
Already changed the flasher relay, was pretty sure it wasnt the culprit but what the heck.

 

holy crap, how annoying!!

just replaced a turn signal bulb today... that sounds like a nightmare.

my older 4runner has an electrical mind of it's own like that but holy smokes. I always start at what's not working and work my way to connectors, fuses, relays next. Hoping it's not one of the relay boxes 'brains' units gone bad, that can get expensive. Sorry, not much help here, hopefully someone else has better advice...

 

sounds like you have a bad ground .

It looks like both those circuits would share the same ground.

You have to think when did this first start??:jessica:

 

Probably not a bad ground persay. Probably a bad trailer connector/converter box. Seen this exact same issue happen in another Tacoma at work. Converter box had failed, causing this issue. Try unplugging the trailer light box, and see if that fixes it.

If its an aftermarket box, you may have to unplug at the taillights. If its a factory box, you may have to unplug under the rear jump seats in the storage pocket/box.

 

Thanks for all the advice. Found the problem, It was the aftermarket trailer wiring harness. Very corroded. Just removed it, all fixed!