Help with sons audio in a mustang
Thread Starter
Drifting
Joined: Dec 2003
Posts: 1,344
Likes: 0
From: Conyers Ga
Help with sons audio in a mustang
I know, I know it's a Mustang but I got a great deal and it's super clean. Anyway, He's got a Pioneer head unit, 2 subs in the trunk and a 1000 watt amp under the seat. It's been working fine since we installed it last month. Yesterday it went in the shop for a new starter motor and when we picked it up, the head unit was dead. No lights and no sound.
Got home and found the 10amp fuse behind the radio was blown so we replaced it. Now we have a dispplay but no sound and the amp under the seat isn't coming on. I am running the ground directly off the battery as we simply could not find a good one for the amp in the floorboard. The stereo is powered off the fuse box and not the battery. I've read somewhere that certain head units have an anti theft feature that effectively "kills" the unit unless you have a code of some sort but in the owners manual for the Pioneer it says nothing about such a feature.
Any Ideas where to look?
Got home and found the 10amp fuse behind the radio was blown so we replaced it. Now we have a dispplay but no sound and the amp under the seat isn't coming on. I am running the ground directly off the battery as we simply could not find a good one for the amp in the floorboard. The stereo is powered off the fuse box and not the battery. I've read somewhere that certain head units have an anti theft feature that effectively "kills" the unit unless you have a code of some sort but in the owners manual for the Pioneer it says nothing about such a feature.
Any Ideas where to look?
Thread Starter
Drifting
Joined: Dec 2003
Posts: 1,344
Likes: 0
From: Conyers Ga
Le Mans Master
Joined: Dec 2002
Posts: 7,981
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From: Piedmont, SC Currently Own: 99 Nassau blue FRC. Previously Owned: 84,95,98 Indy Pace,01 Z06
Sounds like a surge of power was sent to the electrical system and resulted in a spike, therefore possibly blowing your amp or as others stated maybe just blowed a fuse. Double check all fuses in your fuse blocks and make sure no other fuses are blown. Hopefully this is not the case, but I have seen it happen. Goodluck in your search and let us know what you find.
Last edited by NVTHIS; Dec 14, 2006 at 09:32 PM.
Le Mans Master
Joined: Jun 2004
Posts: 5,572
Likes: 4
From: Los Angeles Ca
there should be an inline fuse behind the head unit as well as a fuse in the fuse box. do you have a multi meter? i would check to make sure you're getting 12v on the constant and acc wire on the head unit's loom. also maybe...shot in the dark here... but maybe there is a protection mode on the head unit that needs to be reset. i'd disconnect the ground from the battery and see if that maybe resets it.
Melting Slicks
Joined: Sep 2004
Posts: 2,847
Likes: 439
From: Spring Texas
no. your speakers should still work. I would personally not mess with it and take it back to the shop that worked on it last. They should do a checklist of the car's condition before and after they work on it. If the radio was on while they where working on it (disconnecting and connecting the battery again) it could have damaged the radio and or amp. Obviously there was a big surge since the 10 amp fuse was blown. I think the shop should be responsible. they may have crossed the + and - wires at the battery for a second or two...
I'm thinking the radio is shot --
1. Built in amp has no output
2. No +12v output (remote) to the amp which is the reason the amp does not turn on.
I'm thinking the radio is shot --
1. Built in amp has no output
2. No +12v output (remote) to the amp which is the reason the amp does not turn on.
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Thread Starter
Drifting
Joined: Dec 2003
Posts: 1,344
Likes: 0
From: Conyers Ga
I plan on checking it tomorrow with my multi meter when it's light out. I would hope the fuse in the head unit would have protected it but you never know. But there's definately no output. I"ll try the negative disconnect to see if it resets itself. As far as I know, all the shop did was disconnect the battery to install a new starter motor and as many times as my son and I have done that, we've never had any problems. I feel pretty secure that the amp is ok but is not getting a signal from the head unit.
I'll post the results......good or bad when I know what's up.
Thanks guys......
I'll post the results......good or bad when I know what's up.
Thanks guys......
Thread Starter
Drifting
Joined: Dec 2003
Posts: 1,344
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From: Conyers Ga
Race Director
Joined: May 2003
Posts: 14,137
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From: Iowa
St. Jude Donor '03 thru '26
no. your speakers should still work. I would personally not mess with it and take it back to the shop that worked on it last. They should do a checklist of the car's condition before and after they work on it. If the radio was on while they where working on it (disconnecting and connecting the battery again) it could have damaged the radio and or amp. Obviously there was a big surge since the 10 amp fuse was blown. I think the shop should be responsible. they may have crossed the + and - wires at the battery for a second or two...
I'm thinking the radio is shot --
1. Built in amp has no output
2. No +12v output (remote) to the amp which is the reason the amp does not turn on.
I'm thinking the radio is shot --
1. Built in amp has no output
2. No +12v output (remote) to the amp which is the reason the amp does not turn on.
Thread Starter
Drifting
Joined: Dec 2003
Posts: 1,344
Likes: 0
From: Conyers Ga
Well it's at the audio shop to be bench tested. If it's blown then goodyear will have to pick up the repair cost. The other thing I noticed was that even though the display lights up, the backlights for the buttons don't.
Yep........goodyear fried it.
Yep........goodyear fried it.
Melting Slicks
Joined: Dec 2004
Posts: 2,394
Likes: 0
From: Bay Area CA
I know it was mentioned by other responders but I did not see it answered, Do you have a fuse located within 12" of the battery terminal for the amp that you have wired up? If not please do so ASAP ... problems like your HU being fried are minor compared to the power wire catching fire and burning its length down through your interior ....
Based on the watts I would say you need a 100amp fuse .. maybe 120. www.bcae1.com would answer the question for sure.
Hopefully your radio issue gets worked out soon ... damn n00bs at repair shops these days
Fej
Based on the watts I would say you need a 100amp fuse .. maybe 120. www.bcae1.com would answer the question for sure.
Hopefully your radio issue gets worked out soon ... damn n00bs at repair shops these days
Fej
Thread Starter
Drifting
Joined: Dec 2003
Posts: 1,344
Likes: 0
From: Conyers Ga
I know it was mentioned by other responders but I did not see it answered, Do you have a fuse located within 12" of the battery terminal for the amp that you have wired up? If not please do so ASAP ... problems like your HU being fried are minor compared to the power wire catching fire and burning its length down through your interior ....
Based on the watts I would say you need a 100amp fuse .. maybe 120. www.bcae1.com would answer the question for sure.
Hopefully your radio issue gets worked out soon ... damn n00bs at repair shops these days
Fej
Based on the watts I would say you need a 100amp fuse .. maybe 120. www.bcae1.com would answer the question for sure.
Hopefully your radio issue gets worked out soon ... damn n00bs at repair shops these days
Fej