Hi all, I just picked up a new to me 01 cobra last weekend, so far the car is a blast and I love it! However when I bought it the 2 rear amps were not working... like so many other stang owners from what I have been reading. :nonono: After doing all the normal checks, speaker impedance, 12v, turn on, etc. I decided to pop the amps open and take a look at the PCB. What I found is that resistor #808 was burnt in both amps.
Here is where the resistor is...sorry for the bad pictures, I didn't have a lot of light to work with.
Because I am so damn cheap and would like to keep the car as stock as possible I decided to try and fix them myself. The resistor is a 1/4 watt, 91 Ohm piece (color code: White, Brown, Black) and from what I could tell it had a 10% tolerance. The resistor was really burnt so I could barely make it out.
To fix it I took a trip down the the local Rat Shack and picked up a pack of 91 Ohm resistors, I decided to step up to some 1/2 watt pieces to keep them from just burning up again. These were a bit bigger and required some filing on the leads in order to get them through the PCB but they fit well. I also made sure that they had a 5% tolerance, instead of the 10% that the removed ones had. (You can tell the tolerance by the color of the forth band, Gold=5%, Silver=10%)
The soldering isn't too hard if you've had any time behind an iron, some good copper solder wick, and a solder sucker do make the job easier.
After I wrapped everything up and put the amps back together, I plugged them right in and BAM! I again had mids and lows! They've been working for a few days now with no signs of failure, but I'm keeping the rear seats down and keeping an open nose for burning smells just in case. lol. I know most people just rip the stocks amps out and replace them when they fail, but hopefully someone out there can make use of this.
Here is where the resistor is...sorry for the bad pictures, I didn't have a lot of light to work with.
Because I am so damn cheap and would like to keep the car as stock as possible I decided to try and fix them myself. The resistor is a 1/4 watt, 91 Ohm piece (color code: White, Brown, Black) and from what I could tell it had a 10% tolerance. The resistor was really burnt so I could barely make it out.
To fix it I took a trip down the the local Rat Shack and picked up a pack of 91 Ohm resistors, I decided to step up to some 1/2 watt pieces to keep them from just burning up again. These were a bit bigger and required some filing on the leads in order to get them through the PCB but they fit well. I also made sure that they had a 5% tolerance, instead of the 10% that the removed ones had. (You can tell the tolerance by the color of the forth band, Gold=5%, Silver=10%)
The soldering isn't too hard if you've had any time behind an iron, some good copper solder wick, and a solder sucker do make the job easier.
After I wrapped everything up and put the amps back together, I plugged them right in and BAM! I again had mids and lows! They've been working for a few days now with no signs of failure, but I'm keeping the rear seats down and keeping an open nose for burning smells just in case. lol. I know most people just rip the stocks amps out and replace them when they fail, but hopefully someone out there can make use of this.
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