Can you replace a stock amp with a after market amp without rewiring speaker 2001 sport track

What country are you based in? Most Good auto parts stores and websites should stock a part that will match or replace this unit. Take it with you to an auto electrics specialist and they should be able to source one even if you have to get one from overseas.

Check the fuse first. Next replace the amp. It can be rewired at the amp. You need a volt /ohm meter to do it.

What kind of vehicle? and yes you can ive done this on a few german cars. If your not up to snooping the web for factory diagrams I recommend going to the speakers directly which may require popping door panels off etc... for multiple reasons 1 to label the wire colors to match them at the amp so I can draw a diagram on a piece of paper 2 check the condition of the speaker for tears wear etc....3 to mark any labeling on the back of the speaker especially the impedance values this is super important in wiring on a aftermarket 2 channel amp heres a link to help : http://www.ehow.com/how_6312803_wire-four-speakers-2_channel-amp.html . Once youve jotted down all speaker wiring colors and connected to the amp I would recommend running your own 12v power from the battery and ignition power and ground wires make sure to cap off factory power wires... good luck

You can use the amps if your replacement speakers have the same or higher resistance as compared to the original speakers.

These cars have a factory amp system that will not operate correctly with an aftermarket stereo. You have two choices. You can either run new wires to the speakers your self which would bypass the factory amp. Or you can order the premium sound system Interface here http://www.myinstallkit.com/FORD/1990%20(90)%20FORD%20THUNDERBIRD%20Radio%20-%20Stereo%20Installation%20Kit.htm scroll about half way down the page.

after market or stock if stock with after market speakers,amp,could be a weak hi low input

IF YOU GO TO WALMART AND BUY THE WIRING HOOK UP KIT THATS MADE JUST FOR YOUR TYPE OF CAR U SHOULD NOT HAVE ANY PROBLEMS.. YOU CAN DO THE AMP BYPASS, OR YOU CAN INSTALL YOU NEW DECK AND REWIRE THE SPEAKERS DIRECTLY TO THE NEW DECK.. HOPE I WAS A HELP GOOD LUCK KEITH..

do a me special ,,,,rewire the speakers

Hi there,

The stock amp (mounted inside the sub enclosure) found on the RHS of the boot behind the pull out pannel has a red plug with 8 twisted pairs of wires and 3 other wires (pos, acc and earth).

Out of the twisted pairs you will have

RHS Rear Speaker: Blue/Gray +, Gray/Blue -
LHS Rear Speaker: Red/Gray +, Gray/Red -

You will also have a pair of White/Blue and Brown/White which is the RHS input and a White/Red Brown/White pair for the LHS input. Although... the stock amp uses a common earth input as you will see, the two Brown/White wires going into the same plug.

To put in another amp, you will need one with 'high level' input. Make sure it can take a common ground type input. If it cannot then just use a "high level to RCA" converter.

If you are putting in an after market headunit like i did, then you will just need to separate the two brown/white wires at both ends. If you do this you will need to test which brown/white wire at the head unit end is paired with which wire at the amp end. They are twisted together at the amp end but not at the headunit end (unless you cut the cloth tape back far enough).

http://www.carstereohelp.com/wireharness.htm