It started when a guy tried to hook up my radio so what about factory amp

That usually causes a whole heap of troubles because the amp and radio are connected to the BCM and are part of the computer system. Things like turn signal clickers and door open chimes are actually part of the radio / amp system.

https://www.google.com/search?q=2004+ford+explorer+sport+trac+bypass+factory+amplifier

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Contact this website. Crutchfield Car Stereo Speakers Home Theater Pro Audio 4k TV

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Ford Bluetooth® Wiring Harness - Crutchfield

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Crutchfield Corporation
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Reinstall the factory radio and mount the Bluetooth kit, and you're ready to go. ... 16Reviews ... harness so that I could hook up an aftermarket amp to my factory radio.... works like it's suppose to. says it doesn't work on an 09 Escape but had no .... I purchased this harness to install a parrot ck3100 in my 07 Ford Edge.Missing: pwm

70-5521 wiring harness for ford with 6 CD premium sub amp ...

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Metra 70-5521 Radio Wiring Harness for Ford 03-Up Amp FordPremium stereo radio 6 CD changer with sub amp inputs. ...16:47. How to wire an aftermarket radio / I Demo install with metra harness and antenna ... How to hook up stock amp/sub to aftermarket head unit "ford sport trac" - Duration: 3:01. Pat.Missing: parakeet ‎pwm ‎98

Car Stereo Wire Harnesses - Radio Wires for all Car Audio ...

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Car Stereo Wire Harnesses - Car Stereo Installation Wiring - Stereo Harness ... If you

what radio? factory, aftermarket, etc? if its factory just go to a wrecker for another one, yours is non-repairable. Aftermarket is a problem for a stereo guy.

It can be issue with Faulty radio AMP or the problem is with loose radio speaker wires.
There is a test procedure,you can do.Click the link below to follow the test procedure.
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No sound from speakers on 04 gmc yukon

http://repairhelpcenter.blogspot.com/2012/10/no-sound-from-speakers-on-04-gmc-yukon.html
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these will help.
Thanks.

The original radio is a BOSE system and it has a buit in amp. So if you replaced the deck you need to replace the speakers all so. Don't cut the wires to hook-up the deck buy an addapter KIT. It's not just the stereo that runs though that harness the factory alarm does all so and that will cause you problems. Anyway back to the stereo you need to add an amplifier and problem sovled.

Check your wiring.. Also is there a factory amp?? If so did you wire around the factory amp to each speaker? After market radios can not be used with factory amps & must be wired around it. I posted a wiring diagram below for you to check your wiring.

Your going to have to buy a harness that connect to the back of your radio so you can hook up the RCA cables to your amp. Here is a link for your to buy the auxiliary input adapters for your AMP. http://www.oemautosound.com/c-151-gmc-products.aspx

Thank you for using Fixya and good luck on your project

you should be able to hook it the power antena at the power intena there should be 3 wire one power one ground and the other is the one your looking for take a volt meter or a test light and find the one that gets power when you turn on the radio and turns off when you turn off the radio

you need to get a hi pass filter it hooks up to your rear speakers it has out put for you amp