Front marker lights on when brakes pushed?

[greeneyegi]

so ive got another side job ,word of mouth travels fast in this gn/tb comunity.
like the title says.
i peeked under the dash and thought to myself whoever did this was related to the last guys mechanic that wired his car.
whoa! i stepped back and said i aint touchin this.
got to be pulled apart and rewired.
right up my alley.
has anybody actually had this issue?maybe i can bypass this mess and not have another 8-16 hour wiring job on my hands.
87 gn by the way.

 

[Turbotre]

One of the 1157 bulbs in the taillights is in wrong.They are only supposed to fit in one way,but they can be forced in the wrong way.
It ends up shorting the brake/turn filament to the marker/running light filament.

 

[greeneyegi]

the 1157 is the brake or tail light?

 

[Turbotre]

1157 are the large 2 filament bulbs

 

[Turbotre]

There are two on each side in back,the thin filament is for the taillight/running light,the thick filament is for the brake/turn signal

 

[greeneyegi]

awesome,i knew someone had this issue before.search didnt help.