No Brake Lights!!!

I would check your ground for your rear lights first.

I had this problem when I bought my 92 GT almost the same exact thing !! I tested all the connections, all the bulbs, bought new bulbs, but nothing worked.When you turned the headlights on they light up but when you depressed the pedal nothing !!! After banging my head againt the wall for about an Hour I drove up to AutoZone to see if anyone had heard of the problem. One of the guys own an 89 5.0 Hatch and said he knew what was wrong ! There is a brake pedal switch that is connected to the brake pedal which turns on the brake lights when you depress the pedal ! The switch cost me around $7.00 and about 20 minutes to replace the thing, be prepared to hang upside down to get it done but worked like a charm!! Hope your problem is as easy as this sounds very similar !

I had this problem on my car and it ended up being the light switch assembly was fried. A trip to the 'Zone and i was back in business.

Fuse one feeds the brake lights IIRC.

I'd want to ensure the wiring into the switch is sound - there could be an intermittant connection (those switches are kinda mickey mouse).

For a temp solution, you could run fused CONSTANT power to the brake light switch (a new power source). I hate rigs like that, but we need ya to have brake lights.

Good luck.