Where to ground on 21 Expedition XLT 6 speakers

[Redwater]

I plan to install Amp and Subwoofer for 21 Ford Expedition XLT 6speakers by myself. But please give me an idea about location to ground when connect Amp with power. Thank you.

 

[Yupster Dog]

I plan to install Amp and Subwoofer for 21 Ford Expedition XLT 6speakers by myself. But please give me an idea about location to ground when connect Amp with power. Thank you.

The whole vehicle is a ground so anywhere on metal.
Either find a bolt close to the amp or you can make a new grounding spot with a self-tapping screw. (Make sure you have good ground, remove paint around screw if needed)
Making sure you have the correct gauge wire is also important.

 

[Redwater]

The whole vehicle is a ground so anywhere on metal.
Either find a bolt close to the amp or you can make a new grounding spot with a self-tapping screw. (Make sure you have good ground, remove paint around screw if needed)
Making sure you have the correct gauge wire is also important.

My expedition is an aluminum frame. Thus I don’t know where I can do that. Thanks

 

[sjwelds]

My expedition is an aluminum frame. Thus I don’t know where I can do that. Thanks

Uh, no. Steel frame. And aluminum is a conductor anyway, so you can ground to the body.

 

[Trainmaster]

...and Ford also has a dedicated ground system to most components. Look at a wiring diagram to find which wire on the plugs is ground. Usually it's one of the black ones. Many times the speakers are not grounded, or if they are they are wired to the amp and grounded through the amp.

 

[GGecko311]

I've scrapped the paint off before and done the self tapping screw into the body, and also used the seat-bolts.