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I replaced my tail light bulbs with led bulbs and now have the fast flash problem as I expected. After searching I found that the Trico EP-27 flasher seems to be the correct replacement for my 04. Now the question is if I also replace my front lights with led will this the flasher still work?
Ordinary flashers depend on a level of resistance (or load) in the the turn signal circuit to time the flashing. The bulb is the load. This is why if you had a burned out turn signal bulb your flasher would flash twice as fast. LED bulbs do not have the same "load".
Flashers designed for use with LED bulbs are not as dependant on the bulb "load" to operate properly.
Rezvani's Latest Post-Apocalytic Monster Is a Ford F-150 Raptor Underneath
Slideshow: Called the Fortress, the 850-horsepower pickup combines Raptor underpinnings with military-inspired features, survival equipment, and a starting price of $285,000.