Brake/turn signal

I have a 2004 toyota tacoma and every time I press the parks both front and rear turn signals turn on solid on the left side of the truck and when pressing the brake and the left turn signal it blinks fast I see other people have the same issue on here and they say it's the ground but where exactly is the ground located because I can not find it. And yes I have changed the bulbs and cleaned all connections even on the tail light it's self

 

My diagram shows the Ground for LEFT rear stop light goes THROUGH the Right stop light.
Both lights use the SAME ground location once the leave the right taillight.
My bet is that your problem is between the left and right taillight. (If it’s actually a ground issue)

White/Black wire is the ground wire. Pull the left tail light and check it for ground

 

There is no ground there I checked my wiring from the tail lights to the fuel tank and no ground

 

How did check the wiring?
With a voltage meter set to continuity?
Or with a test light?


You need to see if the White/Black wire is making a good connection to a Ground.
Ground as in frame. But make sure you test it on a clean section of the frame.

I personally like to use a test light. But that requires a connection to battery positive. I use jumper cables. Then use the test light to probe the ground wire.

 

Check the evil converter 4 pin converter Box that causes no end of light problems

Clean out the sockets of the rear tail lights . I use a Fitting brush in a drill .

Unless you have Physical damage to the harness or connectors .which most times causes a fuse to open.

These are the only places

 

I have tried all that I am asking where us the ground connection to the truck

 

They 2 are up in the cab.one under the hood

on the left inner fender

right and left cab reinforcement .

Many circuits attach to these ground points you would have many more problems then just lights.

Good luck.

 

It’s probably easier to show you
You need to understand that then LEFT light Ground goes THROUGH the RIGHT light.
Then out of the right light and to 2 (yes 2) different grounds.

I’d start with pulling the right light and testing the ground wire between the 2 lights.

IE and IG are the Ground locations.

 

thanks I hope that helps the OP

 

While applying the left turn signal the rear turn signal is dime and the brake light flashes I was told it was the ground I cleaned the sockets and changed the bulbs and completely removed the trailer harness

 

How exactly are you testing the ground connection?

If you want to check the Ground wire for the Left light.
Here is how I’d do it.

Pull both tail lights.
The Left tail light plug is R6 pictured below.
The Right is R7

Test for Ground at pin #3 of the R6. Black/White wire. (Left light)
If you have NO ground there, test for Ground at the Right light R7 pin #3.

We’ll go from there.

 

Almost always a bulb socket problem in the taillight itself

 

OP says he cleaned all the sockets ! Removed the converter box . inspected the Tail light harness for damage .