Hi folks

I spent the better part of the day installing a new sub. While hooking up aftermarket harness, i accidentally touched the Red Power Wire to the chassis of the head unit.

a small spark came, i tested the Headunit on a different power line from my car and it works fine, but its not working when connected to the factory wiring (unspliced).

I tested the Red 12V coming from the wire, no power when key is in ACC mode.

I checked Every Fuse under the hood, and under the drivers fuse box. None were blown.

Where could the problem lie?

 

How did you test them? A meter or by pulling them? My friend did the meter trick 2 months ago and they tested fine. I told him to pull them and look and quit being lazy, he did and found it slightly blown.

You could check your ground also.

By the way, what was your power wire for your sub doing near the HU? Not trying to nag you or anything just trying to figure that out.

 

you would hope you blew a fuse..
(why would you check every single one? you just need to check the fuse you would think you blew)

(fyi, you can find that info in the owner's manual)

 

I checked the location of the Headunit fuse online, and read conflicting info, one that it was located below the steering, the other that it was under the hood. (didnt have the manual handy) For precautionary sake i checked both locations & all fuses that are 20+ amps just incase they are labeled funny. i.e Rad = Radiator Fan.

As for why the power lead was exposed, I was attempting to use the red power lead that powers up the headunit when ignition is turned to "ON" to trigger the remote Amp Power On, so the amp kicks on the same time the Headunit is powered up.

So far im still stumped. Will have a fresh look at it this week. btw the vehice is a 07 Tc