Flashing too fast is a result of the circuit not drawing enough current, as in when a bulb is burned out. If you installed LED bulbs in front and in back, you'll likely need a resistor with each one.
Put the original bulbs back in, verify everything works properly, then replace just one bulb at a time with its resistor. If you did just install these in the front, either the resistor is between the wrong terminals or you need one of a lower value. A typical turn signal bulb draws close to one amp. That calculates out to 12 ohms of resistance. You'll need about a 15 to 20 ohm resistor along with one LED bulb to draw an amp of current.
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Thursday, January 29th, 2015 AT 7:34 AM