Go Back   F150online Forums > Audio & Video System > Amplifiers
Sign in using an external account
Register Forgot Password?


Reply
 
 
 
 
Thread Tools Search this Thread Display Modes
  #1  
Old 11-01-2011, 10:58 AM
Junior Member
 
Join Date: Nov 2011
Posts: 5
Amp Has Power But No Sound to Speakers

This might be long winded but I'll start from the top. I had put a 6" Bazooka tube and cheap amp under the rear seat of my truck and they worked for several months. One day the music stopped unexpectedly so I assumed the amp overheated. The next time I drove my truck, I had bass but it cut off after about two minutes. The length of time the sub pushed decreased to about 10 seconds within a few weeks. I assumed the amp was shot and decided to upgrade. I had 2 Fosgate P1 10's that I had used in my Honda that my wife now had in her car. She rarely uses them because of my daughter so I took them back.

I purchased a custom box to fit under my rear seat but the P1's wouldn't fit. I also purchased a used T500 amp from Craigslist as well as a T400 (girl had bought a car with a $2,000 sound system and wad parting it out - I tested them both before buying them and actuallh removed them from her car). Since I couldn't use my new box I decided to hook up the T500 with my P1's in the old box (to hold me over until I could get new subs). All wiring was already in place I just swapped the amp and subs. After initial hook up, I had power to the amp but no sound. I swapped the T500 for the T400 and it worked fine. I swapped the T500 back and it worked fine (I was confused at this point). I ran the subs for about 10 minutes before they cut off unexpectedly. Again, it had power but no sound.

So I've been troubleshooting. I bought new RCA's and ran them directly from the HU to the amp and still nothing. I didn't get as much as a crackle when I plugged them in or removed them. I had a buddy test the connections going into the sub box. Each was receiving 4 ohms (2 ohms if we bridged it). And now I'm out of ideas. I will humor any ideas at this point. I'm about to send my HU back to Pioneer. It's a MVH-P8200BT.
Reply With Quote
  #2  
Old 11-01-2011, 06:09 PM
Senior Member
 
Join Date: Aug 2009
Location: Mechanicsville, VA
Vehicle: 1998 Ford F150
Posts: 5,159
Paul Morck GoodOlBoy711
Did you re-check your grounds? It could be good enough connection for it to power on, but once it actually try's to do something (play music) it's too much and cuts out.
__________________


98 F150 XLT 4.6 2WD
Springtech 6.5" Lift - 35x12.50s

All Inclusive Do's, Don'ts, Common Lift Questions, Reference Pictures, etc.

Quote:
Originally Posted by Patman View Post
Yah front bumper is too flat on such a curvy truck. Kinda looks like it has down syndrome
Reply With Quote
  #3  
Old 11-01-2011, 08:01 PM
Senior Member
 
Join Date: Jan 2004
Location: kansas
Vehicle: 2009 ford f150
Posts: 340
yep......maybe a ground ...but probaly the amp..if the T400 works fine with the same wiring i would suspect the amp...
__________________
www.f150online.com/forums/members/gtullous-albums-my-09-platinum-picture150260-t1.jpg
2009 F-150 Plat.
magnaflow catback
305/60/20 Goodyear Silent Armor
A.R.E. topper
Pioneer AVH-P4200dvd
Nav and Sirrus module
JBL MS-8
Reply With Quote
  #4  
Old 11-01-2011, 08:45 PM
Senior Member
 
Join Date: Aug 2009
Location: Mechanicsville, VA
Vehicle: 1998 Ford F150
Posts: 5,159
Paul Morck GoodOlBoy711
Also since you said you used existing wiring, how big of wire are you using? Because those bazooka's don't really require a lot of power but the rockford amps both require a 4 gauge power/ground and undersizing wire could also be a problem.
__________________


98 F150 XLT 4.6 2WD
Springtech 6.5" Lift - 35x12.50s

All Inclusive Do's, Don'ts, Common Lift Questions, Reference Pictures, etc.

Quote:
Originally Posted by Patman View Post
Yah front bumper is too flat on such a curvy truck. Kinda looks like it has down syndrome
Reply With Quote
  #5  
Old 11-02-2011, 08:41 AM
Junior Member
 
Join Date: Nov 2011
Posts: 5
I used 4 gauge wires. I'll double check my ground connection tonight. I didn't think the amp would power on at all without a good ground. Now that you say that, the light was a little dimmer than I thought it should be. Thanks for the input.
Reply With Quote
  #6  
Old 11-02-2011, 03:22 PM
Senior Member
 
Join Date: Sep 2001
Location: New Hampshire
Vehicle: 2001 Ford F150
Posts: 386
You didn't mention the remote turn on lead (usually a blue wire connected to power antenna output of head unit). Is it maybe wired to the wrong source or has a break in it somewhere.
Reply With Quote
  #7  
Old 11-02-2011, 03:53 PM
Senior Member
 
Join Date: Aug 2009
Location: Mechanicsville, VA
Vehicle: 1998 Ford F150
Posts: 5,159
Paul Morck GoodOlBoy711
He said the amp turns on but won't put out sound. If the turn on lead is bad it won't turn on at all, the only thing it does is tell the amp the radio is on and it's time to turn on.
__________________


98 F150 XLT 4.6 2WD
Springtech 6.5" Lift - 35x12.50s

All Inclusive Do's, Don'ts, Common Lift Questions, Reference Pictures, etc.

Quote:
Originally Posted by Patman View Post
Yah front bumper is too flat on such a curvy truck. Kinda looks like it has down syndrome
Reply With Quote
  #8  
Old 11-07-2011, 08:27 AM
Junior Member
 
Join Date: Nov 2011
Posts: 5
Sorry I didn't respond sooner. My ground was faulty. I had it going to the (painted) body of the truck. I moved it to one of the 4 seat bolts and haven't had any issues since.

So when I actually tried to mount my amp, it's too tight of a fit under the seat. I found a thread about removing the rear seat so I'm going to try that out this weekend. I ordered a couple Comp Shallow Mount Kickers. So once they come in, I'll mount them to my new box and hide away the amp.

Thanks for your feedback. It was a simple problem but I was racking my brain trying to fix it.
Reply With Quote
  #9  
Old 11-07-2011, 08:59 AM
Senior Member
 
Join Date: Aug 2009
Location: Mechanicsville, VA
Vehicle: 1998 Ford F150
Posts: 5,159
Paul Morck GoodOlBoy711
Glad you got it figured out man!
Reply With Quote
  #10  
Old 11-07-2011, 01:57 PM
Junior Member
 
Join Date: Nov 2011
Posts: 5
My remote bass PEQ came in today. Of course I hooked it up and ran it over the seat so I could test it. I was under the assumption that I could kill the bass completely with it (for when my daughter is in the truck). I can dial it to zero, adjust every stereo setting possible to it's lowest setting, and when I turn up the stereo, I still get bass. Oh well, I can still kill the subs with my stereo plus I shouldn't be listening to the stereo that loud with her in the truck anyways.

So I'm brainstorming mounting locations and I'd like some ideas from you guys. I originally planned to mount it on the inside of the lower cubby hole on the dash (you know the one that wont actually hold anything because it flies out the first time you press the gas). That's still a viable option but I see that I can disassemble the PEQ and do a face mounted installation which I believe will look cleaner and can be hidden better while being in plain site.

I'm thinking of mounting it in the void space beside the cigeratte lighter. If I can cut the hole cleanly (assuming there's nothing important behind that space), it would be super easy to adjust and almost look like it came from the factory. What are your suggestions for mounting it? Pics would be awesome if you've done anything custom?
Reply With Quote
  #11  
Old 11-08-2011, 09:10 AM
Junior Member
 
Join Date: Nov 2011
Posts: 5
Ok, I got anxious. Here's my amp mounted to the back of the truck and the PEQ beside the cigeratte lighter.

Click the image to open in full size.

Click the image to open in full size.

Last edited by joshw0000; 11-08-2011 at 09:16 AM.
Reply With Quote
Old 11-08-2011, 09:10 AM


 
 
 
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are On
Refbacks are Off


All times are GMT -4. The time now is 01:04 AM.





This forum is owned and operated by Internet Brands, Inc., a Delaware corporation. It is not authorized or endorsed by the Ford Motor Company and is not affiliated with the Ford Motor Company or its related companies in any way. FordŽ is a registered trademark of the Ford Motor Company
 
Contact Us Advertising Privacy Statement Terms of Service Jobs Forum Text Archives
Emails & Contact Details