Brake lights 1990 dodge Dakota don't work is there an in line fuse that I am missing

The ground wiring on newer vehicles is a little complicated. Older cars, the ground would have been to the body around the tail-lights, but these have a ground wire in the harness and is connected to the turn-signal switch, and other sources. I don't think you have a ground problem. Does the fuse blow as soon as you press it into the fuse-block, or when you step on the brake? I believe you have a dead short somewhere, possibly a pinched turn-signal wire close to the tail-light assembly. Brake lights work through the turn-signal wires from the turn-signal switch on the steering column. That's how you can have one side blinking for turn while the other side stays on for brake. I'm kind of shooting in the dark here because I don't know what all you've done. If you replaced the turn-signal switch in the steering column, you may have pinched a wire or something there. Another thing, if the fuse doesn't blow as soon as you press it in, will both turn-signals work as long as you don't press on the brake? If you can provide a little more information, I might be able to help you more. One last thing....Have you replaced tail-light/turn-signal bulbs? If so, be sure you used the right bulb. You should only have two bulbs, one for back-up lights and one 1157-type combination for tail-lights and turn-signals. I have seen people use a single contact (1056) bulb in place of a 1157, which creates a short from brake/turn-signal back into the tail-light circuit. I do have a 1994 Dodge Dakota.

These are all different circuits. The brake lights are on a 10amp fuse - the headlights are on a 50amp fuse - and the parking and dash lights are on a 20amp fuse.
Do you have power going into the headlight switch and the brake light switch ?

may have a broken connection in the socket where the bulb goes

First check the fuses. Then test power to the bulb socdkets with a voltmeter

I would check the fuses along with the bulbs remember to check the underhood fuse and cab fuse if nothings wrong its something to do with the wires to the lights hope this helps :)

Check the bulbs for continuity, the bulb holders for internal corrosion and the connections themselves for integrity.

Why would it be a fuse?
You have front parking lights? Then no fuse

If it was a fuse ---would that fix it -- NO it wouldn't
Why do fuses blow?

Have you even removed the tail light housing & checked the bulbs,
or checked the sockets for ground or under truck for wiring
harness issues?

Don't need a manual to check all fuses under the dash &
in the box near brake booster

Hazzards run off a flasher , try a new light switch and see if that helps .......there is also the chance the plug comming thru the firewall is loose . Not common but I have seen it do some simillar things

that information is in the owners manual, if u don't have one follow the link to download one for free.

http://www.dodge.com/en/owners/manuals/index.html

Do all three brake lights not work or just the lower two? The lower two go through the turn signal switch, but the high mount does not.