OK - a little background.
My girlfriend bought a used Acura TL a few months ago. Installed in the trunk was a JL Audio 150x2RMS amp powering Alpine Type-S front speakers. Since she is now selling I decided to put the amp in my car, and wire her car back to work with just the stock amplification.
I removed the JL amp from her trunk, and of course, the front speakers were then inoperable. The PO has run some Monster Cable speaker wire to the front passanger foot well and spliced them into the stock front speaker wires, effectively running the new front speakers with the JL amp.
To get the speakers to run without the amp I opened up the box and spliced the stock speaker wires back together, leaving the Monster Cables to slowly decay.
However, I still have no front speaker sound. Is there a step I have neglected? As of right now I thought I had "undid" all his work and would have operable front speakers... but not dice.
Does anyone have a tip for me on what else to look for? Thanks in advance.
A picture for some views: Disclaimer. Its not pretty. The short "jumper" wires are using the old MC wire as the wires were to short to reach each other.

 

OK, so you took care about wires from the amp to the speakers, but what about wires from the head unit to the amp?
I assume that the amp is powered up, and rear and center speakers work.

 

The only wires going to the amp were the turn-on lead (the blue one) and the preamp cable. The speaker wire is now spliced back together where the amp's speaker wires used to be spliced in.

The amp is removed.

Front the appearance of it (I don't have any TL experience) all the wires to the amp orginiated from the area of the stock alplifier in the passanger footwell area. ie: no need to go to the rear of the head unit.

 

u should give STREETEFFECTZ or ELDUDERINO a pm...they know more about this shit than anyone

 

Maybe it is this:

The Alpine speakers are now trying to get their power from the factory amp, right?
If this is the case then the factory amp cannot power the alpine speakers efficently. I believe the factory amp and orginal front speakers combo are 2 ohm and the alpines are 4 ohm. You have 4 ohm speakers in the front and the rest of the speakers in the car are 2 ohm. Try this, adjust the fader to the fronts only and turn the volume up, you maybe be able to hear something from the fronts.

 

King of Pain - thanks for the post.

Yes, the stock speakers are now getting power from the stock amplifier in the footwell.

I have played with the fader, etc to no avail. I was not aware that stock speakers are 2 ohm. You would think I would still get some sort of response out of them (right ?).

I will try again though. Thanks again.

 

make sure no wires were touched on the other harness coming from the head unit.. if there are aplines in there, then there has to be a crossover with it that he hid somewhere.. if this is the case then you will have no sound until you run a wire from the stock amp (front right, front left) into the inputs of the alpine crossover.. let me know what happens as i have completely changed my audio system with cleansweep, alpines. subs, amps.. the whole deal..

 

OK - well heres the deal. I solved the "mystery" and now have power/sound to the speakers. I finally figured it out when I realized that the speaker wires from the HU are only pre-amp... I had assumed that the patch going to the new amp was connected into the back of the HU. But when I investigated further, ie looked up above the stock amp, I saw that the installer had just used the pre-amp signals of the stock speaker wires and spliced a patch cable into them.
When I spliced the stock speaker wires back together I had spliced the post-amp wires. I didn't know there was also a splice before the amp (where the patch cable was spliced into). Of course that makes total/perfect sense now as the stock amp would have to be bypassed to use another amp. So basically I had spliced back the post-amp speaker wires, but not the pre-amp.
Thanks again for all the help. I found the info I needed here on Acurazine. Now someone buy her A-Spec - its offically for sale now!

 

Glad you solve the problem.
I would think that colors of the wires are different. Didn't you noticed it when splicing?