If it "keeps" lowing the fuse, there can be only one reason for it...you "keep" replacing the fuse without diagnosing the circuits to find out WHY the fuse is blowing in the first place.
When a fuse blows, there is a reason for it. If you do not find the reason and correct it, the fuse will continue to blow.
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Where's The Fuse?With all of that said, the first thing I would check is all of the light bulbs. Sometimes the bulbs get really hot and melt inside and it causes the metal contacts in the bulbs to touch each other and short the circuit out. This is especially true if you can replace the fuse and everything seems to work ok for a while. They will all work until the offending bulb gets hot and "POOF" there goes the fuse again.
This condition can be hard to diagnose since the short circuit usually goes away as soon as the bulb cools off for a few seconds. In cases like this, what I usually recommend to save time and money is to replace all of the bulbs.
If it is fuse #6 (15 Amp) in the Central Junction Block that keeps blowing, it only powers the tail lamps, licence plate lamps, front park lamps and the front side marker lamps. The cost of replacing all of these bulbs is a LOT cheaper than an hour of diagnostic time at most shops. If this does not fix the problem, then you will have to trace all of the wires going to all of these bulbs to find out which one is shorting and where it is shorting. This could turn out to be very time-consuming and expensive, but at least, you will have eliminated the likelyhood that it is caused by a bulb.
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