Amp works but sub doesn't?

[Hake19]

Hey I just got a free amp and sub from a buddy... I went and bought the wiring and hooked it up outside the truck... Worked great.. So we unplugged it, wired it through it and hid the wires... Plugged it in and now everything works but the sub.... What could possibly gone wrong?

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[CSCStang]

Hey I just got a free amp and sub from a buddy... I went and bought the wiring and hooked it up outside the truck... Worked great.. So we unplugged it, wired it through it and hid the wires... Plugged it in and now everything works but the sub.... What could possibly gone wrong?

Go through all the wiring one at a time starting with the sub. How are you sure the amp is working? How did you ground it outside the truck?

 

[Hake19]

I grounded it inside the truck that's connected to the body of the truck... Which has paint on it tho...

The blue light on the amp turns on

 

[ancorp 10+ year member]

Remove the paint where the ground is for a proper contact. Plug a different sub or speaker into the amp to see if it plays. If it still doesn't, check the source. With a simple 3.5mm headphone jack to RCA cable, you can plug your phone or ipod or whatever directly into the amp to see if it plays.

 

[CSCStang]

Remove the paint where the ground is for a proper contact. Plug a different sub or speaker into the amp to see if it plays. If it still doesn't, check the source. With a simple 3.5mm headphone jack to RCA cable, you can plug your phone or ipod or whatever directly into the amp to see if it plays.

This^^^