Re: Keep blowing a fuse! I might blow a gasket!
Fuse for T/s, etc., is 20 amp and bulbs, all four, are 1157 plus the side markers, 194. 64 watts (1157X2) + 6 watts (194X3) = 70 watts per side, meaning even at battery voltage, 12.0 volts, max current drawn is 6 amps.
So a SFE 20-amp fuse should be more than sufficent. you can get a circuit breaker to sub for a fuse at Advance Auto, and others. make sure there is a good connection from the socket to ground, meaning the taillight bezel to body, and the ground wire from the front socket to radiator support.
What you could do to troubleshoot the overload, remove the bulbs, except for the turn signal indicators, unless you have small hands, unhook battery, turn key on, select the turn side blowing the fuse, no accessories on, turn signal, and use the ohmmeter from the fuse to ground to see if there is another path. Bulbs will show under 5 ohms to ground.
Sometimes wiring gets old and so do the crimp terminations and they become high resistance and they only show up when current is flowing. You won't find these with a cold/unused circuit.
You might measure the available voltage at the rear light socket to see how much voltage drop there is from the turn signal fuse to battery and to socket. Anything more than 2.0 volt drop from the front of the car to the rear is concern, remember the 6 amps at 12 volts, 7 amps at 10 volts, providing nothing else is on in the circuit.
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