No lows on the driver side speakers just the highs. The passenger side is just fine. went through all the fuse wires and so on, the rear speaker has no lows either. Could it be the head unit.

 

I guess you checked the fuses? Fuse 28 (20A) on the footwell panel controls the BOSE relay. Fuse 5 controls the radio/CD(15A) and 24 controls the antenna(20A) both on the same panel. Unlikely to be those though.

The door speakers are amplified. If you fit an aftermarket HU you have to fit a Soundgate adaptor or you lose bass performance. I'm guessing but that may mean that there's an issue with the amplification on the drivers door speaker. I'd focus on the connections for a start.

If that fails, here's the troubleshooting Guide which might help.

One other common problem is that the wiring in the rubber gaiter in the door hinge area can chafe and cause all types of electrical problems. Its worth checking that also.


Document ID# 725567
2002 Chevrolet Corvette
Speakers Inoperative - One or More

Step


Action


Value(s)


Yes


No

Schematic Reference: Radio/Audio System Schematics

1

Did you perform the Radio/Audio System Diagnostic System Check?

--

Go to Step 2

Go to Diagnostic System Check - Radio/Audio System

2

1. Turn ON the ignition, with the engine OFF.
2. Turn ON the radio.
3. Adjust the radio balance and fade to the suspect speaker.

Do all of the speakers operate properly?

--

Go to Testing for Intermittent and Poor Connections in Wiring Systems

Go to Step 3

3

Are all of the speakers inoperative?

--

Go to Step 9

Go to Step 4

4

Do both sub-woofer amplified speakers operate properly?

--

Go to Step 5

Go to Step 11

5

Are all of the non-amplified speakers inoperative?

--

Go to Step 10

Go to Step 6

6

Test the low level audio signal circuits for an open or high resistance. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

--

Go to Step 30

Go to Step 7

7

1. Turn OFF the ignition.
2. Disconnect the radio.
3. Momentarily touch a 1.5 volt battery between the appropriate speaker output circuits of the radio.

Does the speaker emit an audible pop?

--

Go to Step 21

Go to Step 8

8

Test the appropriate non-amplified speaker output circuits of the radio for an open or high resistance. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

--

Go to Step 30

Go to Step 20

9

1. Disconnect the radio.
2. Test the antenna relay coil supply voltage circuit for an open or short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

--

Go to Step 30

Go to Step 21

10

Test all non-amplified speaker output circuits of the radio for a short to voltage or a short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

--

Go to Step 30

Go to Step 21

11

Are both sub-woofer amplified speakers inoperative?

--

Go to Step 12

Go to Step 15

12

1. Disconnect the Bose relay.
2. Turn ON the ignition, with the engine OFF.
3. Turn ON the radio.
4. Test the antenna relay coil supply voltage circuit and the battery positive voltage circuit of the Bose relay for an open, high resistance, or a short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

--

Go to Step 30

Go to Step 13

13

Test the ground circuit of the Bose relay for an open or high resistance. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

--

Go to Step 30

Go to Step 14

14

1. Turn OFF the ignition.
2. Place a fused jumper across the Bose relay connections between the battery positive voltage circuit and the speaker supply voltage circuit.
3. Turn ON the ignition, with the engine OFF.
4. Turn ON the radio.

Do all of the speakers operate properly?

--

Go to Step 24

Go to Step 23

15

1. Disconnect the appropriate sub-woofer amplifier.
2. Test the speaker supply voltage circuits of the appropriate sub-woofer amplifier for an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

--

Go to Step 30

Go to Step 16

16

Test the ground circuits of the appropriate sub-woofer amplifier for an open or high resistance. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

--

Go to Step 30

Go to Step 17

17

1. Adjust the radio volume to an audible level.
2. Test the low level audio signal circuits of the appropriate sub-woofer amplifier for AC voltage.

Does the voltage measure greater than the specified value?

0.20 V AC

Go to Step 22

Go to Step 18

18

Test the low level audio signal circuits of the appropriate sub-woofer amplifier for an open, a short to ground, or for a short to voltage. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

--

Go to Step 30

Go to Step 19

19

1. Disconnect the Bose signal processor.
2. Test the appropriate speaker audio input circuits of the Bose signal processor for an open, short to ground, or short to voltage.

Did you find and correct the condition?

--

Go to Step 30

Go to Step 23

20

Inspect for poor connections at the harness connector of the speaker. Refer to Testing for Intermittent and Poor Connections and Connector Repairs in Wiring Systems.

Did you find and correct the condition?

--

Go to Step 30

Go to Step 25

21

Inspect for poor connections at the harness connector of the radio. Refer to Testing for Intermittent and Poor Connections and Connector Repairs in Wiring Systems.

Did you find and correct the condition?

--

Go to Step 30

Go to Step 26

22

Inspect for poor connections at the harness connector of the appropriate sub-woofer. Refer to Testing for Intermittent and Poor Connections and Connector Repairs in Wiring Systems.

Did you find and correct the condition?

--

Go to Step 30

Go to Step 27

23

Inspect for poor connections at the harness connector of the Bose signal processor. Refer to Testing for Intermittent and Poor Connections and Connector Repairs in Wiring Systems.

Did you find and correct the condition?

--

Go to Step 30

Go to Step 28

24

Inspect for poor connections at the harness connector of the Bose relay. Refer to Testing for Intermittent and Poor Connections and Connector Repairs in Wiring Systems.

Did you find and correct the condition?

--

Go to Step 30

Go to Step 29

25

Replace the speaker. Refer to Speaker Replacement - Front or Speaker Replacement - Rear .

Did you complete the replacement?

--

Go to Step 30

--

26

Replace the radio. Refer to Radio Replacement .

Did you complete the repair?

--

Go to Step 30

--

27

Replace the appropriate sub-woofer amplifier. Refer to Speaker Replacement - Front .

Did you complete the replacement?

--

Go to Step 30

--

28

Replace the Bose signal processor. Refer to Bose Module Replacement .

Did you complete the replacement?

--

Go to Step 30

--

29

Replace the Bose relay.

Did you complete the replacement?

--

Go to Step 30

--

30

Operate the system in order to verify the repair.

Did you find and correct the condition?

--

System OK

Go to Step 2
Document ID# 725567
2002 Chevrolet Corvette

 

Im not a tech or anything but i am good with car audio. The rear non amped speakers do not have any lows either. I have the stock headunit, and would not want to have an after market unit. i checked all the connections, took radio out door speaker out fuses relays everything. i have found nothing that could cause this problem. The only thing i can think of is the stock head unit is not sending the low audio to the driver side speakers, front or back.

 

Sounds like you tried most things then. Normally its an amplification problem when this gets reported here but you could well be correct.

You can probably pick up a stock player cheaply on E Bay or from one of the used parts dealers. You may even find someone who has replaced the stock with after market. You could have mine but the shipping from England would be mega $$$$$$$$$$$

 

so you think that could be the problem. i have been at this all night trying to find the problem and cant find anything. the last place to check would be the HU. i will do it in the morning and let you know.