Do I have the right speaker parts in my '98 Z3 subwoofer?

1998 Chevrolet Corvette Car Stereo Radio Wiring Diagram
Radio Constant 12V+ Wire: Orange
Radio Switched 12V+ Wire: Yellow
Radio Ground Wire: Black
Radio Illumination Wire: Gray
Radio Dimmer Wire: Brown
Radio Power Antenna Trigger Wire: Pink
Radio Amplifier Turn On Trigger Wire: N/A
Front Speakers Size: 4? Speakers
Front Speakers Location: Kick Panels
Left Front Speaker Wire (+): Tan
Left Front Speaker Wire (-): Gray
Right Front Speaker Wire (+): Light Green
Right Front Speaker Wire (-): Dark Green
Rear Speakers Size: 6?
Rear Speakers Location: Rear Sides
Left Rear Speaker Wire (+): Brown
Left Rear Speaker Wire (-): Yellow
Right Rear Speaker Wire (+): Dark Blue
Right Rear Speaker Wire (-): Light Blue

Most common speakers will interchange as long as the diameter and depth as well as the wattage and oms are the same as the factory speakers.There is no need to buy overpriced equipment for a factory car system. It"s overkill.

:o( you're going to have to pull the radio out to see what they did. They probably added a wire to an inappropriate circuit to power the new radio or amp. I will paste your factory wiring colors below. If you now have an extra wire, that is the likely culprit. Trace it to see where they hooked it in. If it isn't going to the the fuse box and using an extra slot, make it so by connecting it to the cold side of the fuse and put an approprite size fuse in. To determine the fuse size to use, you can compare the wire gage to other cold side wires and use a fuse the same size as you see being used for similar gage wires. Let me know if you have more questions.

1996 BMW Z3 Car Stereo Installation Diagram
Car Radio Battery Constant 12v+ Wire: Red/White
Car Radio Accessory Switched 12v+ Wire: Violet/White
Car Radio Ground Wire: Brown
Car Radio Illumination Wire: Gray/Red
Car Stereo Dimmer Wire: N/A
Car Stereo Antenna Trigger Wire: White
Car Stereo Amp Trigger Wire: White
Car Stereo Amplifier Location: Passenger Kick Panel
Car Audio Front Speakers Size: N/A
Car Audio Front Speakers Location: N/A
Left Front Speaker Positive Wire (+): Yellow/Red
Left Front Speaker Negative Wire (-): Yellow/Brown
Right Front Speaker Positive Wire (+): Brown/Black
Right Front Speaker Negative Wire (-): Blue/Brown
Car Audio Rear Speakers Size: N/A
Car Audio Rear Speakers Location: N/A
Left Rear Speaker Positive Wire (+): Blue/Black
Left Rear Speaker Negative Wire (-): Yellow/Brown
Right Rear Speaker Positive Wire (+): Blue/Violet
Right Rear Speaker Negative Wire (-): Blue/Brown

I have a similar problem on Audi A6 2.5 tdi year 2000, is just that my subwoofer is working fine, but the rear speakers have no sound and the rear satellites on the same ciruits are working just fine, I cannot explain this! I have taken apart the rear speaker and teasted with an ipod and one is working fine but the other is dead! I don t know if there is any connection, or there is a filter for the rear speakers and if one speaker is dead there will be no sound on the other speaker! but as i said on the same cables satelites are working well!

Constant 12V+ Brown/White
Switched 12V+ Orange
Ground Black/Light Green
Illumination Pink/Black
Dimmer Pink
Front Speakers 5" x 7" Doors
Left Front (+) Gray/Blue
Left Front (-) Yellow/Blue
Right Front (+) Blue
Right Front (-) Yellow
Rear Speakers 5" x 7" Side Panels

Left Rear (+) Blue/White
Left Rear (-) Blue/White
Right Rear (+) Blue/Black
Right Rear (-) Red/Blue

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1996 Chevrolet Beretta Car Radio Wiring Diagram By Wire Color
Car Radio Battery Constant 12v+ Wire: Orange
Car Radio Accessory Switched 12v+ Wire: Yellow
Car Radio Ground Wire: Black
Car Radio Illumination Wire: Gray
Car Stereo Dimmer Wire: Light Brown
Car Stereo Antenna Trigger Wire: Pink
Car Stereo Amp Trigger Wire: N/A
Car Stereo Amplifier Location: N/A
Car Audio Front Speakers Size: 4′ x 6′
Car Audio Front Speakers Location: Kick Panels
Left Front Speaker Positive Wire (+): Tan
Left Front Speaker Negative Wire (-): Gray
Right Front Speaker Positive Wire (+): Light Green
Right Front Speaker Negative Wire (-): Dark Green
Car Audio Rear Speakers Size: 6′ x 9′
Car Audio Rear Speakers Location: Rear Deck
Left Rear Speaker Positive Wire (+): Brown
Left Rear Speaker Negative Wire (-): Yellow
Right Rear Speaker Positive Wire (+): Dark Blue
Right Rear Speaker Negative Wire (-): Light Blue

I had the same problem a while back after having a JVC MP£ player fitted at Halfords. The guy told me my sub-woofer behind the back seat wouldn't work with the new stereo which I said was ridiculous, then one of the other guys came to look and told him I needed a different cable to link everything together - then it worked brilliantly.
Sorry I dont know a part number but that is definately your problem.
I hope this helps - or better still that you already have it sorted !!

they are held in place by small philips head screws......in addition the drivers side kick panel has a 3 bolt enclosure that holds the hood release latch to the kick panel and left footwell, this must be removed as well.....now the fun part....you must lift UP and OUT at the same time to release the lower lip of the kick panel which is tightly wedged.....finesse is required! by the way that a 5 1/4 speaker, but the footwell will also hold some 6 inch speakers as well....I have alpines in mine (89 cab)..put some Dynamat in while your down there!