Tail light fuse keeps blowing but breaklight and signals still work. I know there may be a short but can't find it.

Short circuit most likely in rear light wiring

fuses blow because of dead shorts or excess current draw
to blow a 15 amp fuse indicates a dead short
by disconnecting the rear lights , the problem is in something else you have replaced
could be a problem in the head light wiring

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.

If the fuse blows, you have a dead short to ground somewhere, likely around the tail lights or parking lights. Try this:

Get a box of the correct fuses.
Remove all tail and parking bulbs and put in a new fuse. If the fuse does not blow, try installing each bulb at a time to see which light assembly causes the fuse to blow.
Let's suppose its the RH tail light assembly. Pull it off the car and check for dirt and damaged wiring.

If this is an older vehicle, there may be wiring damage (due to rust) in the harness under the carpets.

There is a short in the electrical circuit that is protected by the fuse. If this fuse protects the tail lamps then there is s short in the wireing from the fuse to the tail lamps, the insulation on the wires could be could be broken and shorting againt the bodywork.
If you cannot find the fault, the quickest solution is to rewire the faulty circuit and bypass the faulty wiring.
If you cannot DIY then you need an auto electrican to find the fault and fix the problem.

you got a wiring issue that keeps shorting out fuses find that and that should take care of everything else

If the fuse is blowing out it means you have a short cirtuit.possible causes the Light socket, pedal sensor or somewhere along the wiring harness Aires might na chewed you and touching each other

Two possibilities. Water could be splashing up from the road and getting in where it shouldn't and shorting something, blowing the fuse. Or you could have a short in the wiring to the headlamps that is blowing the fuse.

When the fuse keeps blowing, there is only one reason why. That is because there is a short, not because other fuses are missing. For example if the fuse is rated at 10amps, and the wire after the fuse is drawing more than 10 amps it will blow. If for example you put a bulb in series with the wire than is only drawing 2amps the fuse will not blow that is because you have put a load that is less than what the fuse is rated for. One way to trace a short is to start where the fuse is at. Find which is the wire connected to that fuse. one side of the fuse is connected to the battery and the other side goes to whatever device it supply, and there maybe several of them. Note what else do not work beside the turn signal, Most short occur where there is an electronic device. Since your car is an older model, it is unlikely to an electronic device, but a wiring may have been worked on and somehow a hot wire is touching the body of the car. If the fuse blows only when the key is in the on position, then logically you would look at the back where the rear lighting may have been worked on, thats because turn signal are always off when the key is off. If it blows even when the key is off then you know there is something else beside the turn signal that the fuse is connected to that is on even when the key is off such as tail lights because you can turn on the tail light with the ignition off. You get what I mean?

you could have a shorted tail light bulb. these also controls the park lights at the fronts. so please check all four bulbs. replace what ever busted bulb you can find.

tnx 4 using fixya,

drcool