So, stupid question. I want to swap some LED bulbs in for my cab lights. and parking lights. but I have heard that i may have to wire in a resistor.. I know that LEDs use less juice so maybe the full voltage could burn them out? not sure. Any words of wisdom would be awesome! Thanks

 

Only place you'll need a resistor is for the turn signals. The high current is required to make a standard flasher operate properly. Install a flasher made for LEDs like this one, and you can forget about the resistors entirely.

 

Alright. sounds awesome. Thanks!

 

LED's are not liked by our trucks that have a RABS module. You will most likely nead to put the load resistors in place, since the LED's do not pull enough of a load and the computer thinks the taillights are burned out.

Read this thread for more info.

https://www.ford-trucks.com/forums/1...-light-on.html

Ray

 

News to me, thank you.

 

They give the E4OD transmissions fits too.. (shifting problems/converter lockup problems) It's an easy fix, load resistors are the cure!

 

So do i still need the different flasher and the resistor, or just the resistor

 

Just two resistors will fix you right up, one at each rear brake light. BTW the resistor goes from the wire going to the brake light filament to ground..

 

This is just my two cents. I wouldn't bother with LED's, for the reasons mentioned, and also because LEDs don't evenly reflect in the lights that were originally designed for incandescent.