Where is the glow plug relay on my Ford focus 2006?

A diagnostic test showed code p0100 which is the Glow plug relay. I suspected that may be a problem as the glow plug light does not always show when the key is in ignition

Anyway, where can I locate the GPR?

Is it under the front right side wing?

OH AND Please ANSWER THIS: WOULD A BAD GLOW PLUG RELAY CAUSE ANY PROBLEMS OR NOT WITH THE RUNNNIG OF SAID VEHICLE?

Glow plugs only help the engine start in cold weather…
they are fully optional. They focus will run fine as long as its not cold outside