simply math should give you that

Watts / Volts = Amps
(55+55)/12= 9.16

so a 10 Amp should be good 15 is plenty
when your truck is on it is at 14 volts or so so its even less amps about 7.5

 

MAKE SURE YOU USE WIRE THAT CAN HANDEL THE AMPERAGE!!!!

This is a general guide for wire size and amperage at 20 degrees c so i would use the next size up for anything you need these are MAXIMUM AMPERES that can pass thu the wire with out melting the casing

In an electrical systems the conductors should not be sized with voltage drops exceeding 3%. For a 12V system the maximum voltage drop should be less than 12 (V) x 3% = 0.36 (V).
The wire size is required for a 3% voltage drop in 12 Volt circuits. Oversize the wire if the voltage drop is critical.



sorry for the story but i think this is good info for every one, so we don't burn your trucks to the ground with all our mods