All Wired Up But It Ain't Working (pics)

[SHO93OFF]

Ok soo iam installing my aftermarket radio, I remove the old one and find both harnesess grey and black, i connect the harness adapters i got from best buy, then wire everything up to the harness from the aftermarket radio like soo...

But radio isnt turning on, By the Iam not getting 12.v at the yellow wire(constant voltage) but i am getting 12.v at the red wire (ignition/voltage)
whats going on here ....?

 

[Phoenix]

Stupid question but needs to be asked. Was the key set to "on" when you tested the accessories wire?

Do you have a test light handy?

Did you also bypassed the amp (located in the trunk)?

 

[only1me]

You dont have the bypass the amp when using the black rectangle connector in the dash for speakers, you just unplug the amp in the back,cause its no longer used, or needed.

Not getting any power, did you check ur fuses in the fuse box that correspond with the radio.If Im not mistaken I believe that wire runs to the fuse box.

 

[SHO93OFF]

well iam very embarassed to admit this but it turns out it was a fuse, i replaced it and the headunit turned on,BUT NOW I HAVE AN EVEN BIGGER PROBLEM !!! when i turn the volume up to 20 or higher the headunit turns off, it happened 3 times and on the 3rd time the fuse in the back of the headunit blew, also the back of the radio got extremely hot, any one know whats happening here?

 

[only1me]

Hum did you dissconnect all the wiring to the amp in back? My only guess would be that or something internal with the radio itself.

 

[SHO93OFF]

I didnt disconnect anything in the back, would that cause this problem ? if soo why ?

 

[only1me]

I dont know but I think it was Jelloslug said the speakers are dual wired so not just the factory speaker wiring runs to them but the wiring from the amps goes to them also.

 

[hawkeye18]

ok, listen very carefully. Open the trunk, look at the amps on the wall of the trunk, and DISCONNECT EVERYTHING. What's happening is that your stock amp is receiving the (already amped) signal from the head unit, amplifying it more, and sending it back to the head unit. This blows your head unit up.

Ask me how I know this . I went through 6 10-amp fuses before I figured it out. With mine, as soon as I turned it on, my speakers would go "wheeeeeeeeeeee" like a camera flash was charging up, then *pop*, the fuse would blow.

As soon as I disconnected the amps, it worked fine, and it's worked ever since then.

 

[SHO93OFF]

I think you hit that one on the head, ill try it tomorrow, thanx

 

[shoteen95]

What kind of headunit is it?

I ran a Panasonic headunit in a JBL equipped SHO with the factory amps in play for a good year before I started upgrading further and I never had a problem...but I guess that isn't the case with everyone. Since he's already using the secondary plug that bypasses the amps, does leaving the amps in the trunk plugged in still cause problems?

 

[0V3RC10CK3D]

I don't think you're supposed to use the black rectangular connector for your speakers, I think your supposed to use the square one that should be stuffed back there somewhere. Then I also grab an amp bypass cable and pull the rest of the crap out of the trunk.

 

[n8rsk8r]

http://www.scosche.com/scosche/connectors/ford-premium.asp

 

[cmz829]

i had also bought a wiring harness from best buy and the harness you buy there is cheap and the black harness has prongs inside that bend and short the speakers out that is what was causing my headunit to get real hot on the back but i never ran it long enough like that to see if the fuse would blow disconnect your wiring harness and check to see if the connections inside are bent

 

[SHO93OFF]

Ok guys basically wat i did is I keeped the wireing you see in the pictures and just disconnected the two amps in the back, is there somthing else i should do, do i really need the amp bypass ? everything seems to be working fine with wat i did.

 

[only1me]

No you dont need the amp bypass when you bypass the amp like you did with the connector for the speakers in the dash.

 

[SHO93OFF]

Ok cool, soo iam good to remove all the amps and stuff from the back

 

[only1me]

Yea you dont need them anymore.

 

[red89mtx]

so u know i hand wired all mine in my 89 also and the factory amp is still on it works fine with my deck i put pioneer 6 x 9's in the rear they sound great .

not sure why everybody tries to bypass the amp it seems better with it on then off. although its alot louder in the rear than front and any volume level above 10 is too much for em. good luck to ya

 

[dantheman68]

so u know i hand wired all mine in my 89 also and the factory amp is still on it works fine with my deck i put pioneer 6 x 9's in the rear they sound great .

not sure why everybody tries to bypass the amp it seems better with it on then off. although its alot louder in the rear than front and any volume level above 10 is too much for em. good luck to ya

everyone bypasses the amps, because coming from a headunit, the signal is already amplified.. and amplifying an already amplified signal isnt the best idea... you do lose some audio quality... some claim they dont, but you sure dont gain any... plus since the "bypass" wiring is already there, its just easier to take the amps out completely and plug into the regular taurus wiring