GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Buick 🢒 2000 🢒 Century 🢒 Body and Accessories 🢒 Entertainment 🢒 Radio Poor Reception

Radio Poor Reception W/O UV7

Step

Action

Value(s)

Yes

No

1

Did you review the system operation?

--

Go to Step 2

Go to Symptoms

2
  1. Turn the radio on.
  2. Using a DMM, backprobe between the radio antenna module connector C395 terminal A and ground.

Does the voltage equal the specified value?

12 V

Go to Step 4

Go to Step 3

3
  1. With the radio still on.
  2. Using a DMM, backprobe between the radio terminal F3 and ground.

Does the voltage equal the specified value?

12 V

Go to Step 9

Go to Step 7

4
  1. With the radio still on.
  2. Using a DMM, backprobe between the radio antenna module connector C395 terminal A and terminal B.

Does the voltage equal the specified value?

12 V

Go to Step 5

Go to Step 10

5

Inspect the coaxial cable, (between the radio and the radio antenna module).

Is the coaxial cable OK?

--

Go to Step 6

Go to Step 8

6
  1. Inspect the connection between the rear window antenna grid and the radio antenna module.
  2. If OK, replace the radio antenna module. Refer to Antenna Amplifier Replacement for service procedure.

Is the repair complete?

--

Go to Step 11

--

7

Replace the radio. Refer to Radio Replacement for service procedure.

Is the repair complete?

--

Go to Step 11

--

8

Replace the coaxial cable. Refer to Radio Antenna Cable Extension Cable Replacement for service procedure.

Is the repair complete?

--

Go to Step 11

--

9

Repair open in circuit 145.

Is the repair complete?

--

Go to Step 11

--

10

Repair open in circuit 351.

Is the repair complete?

--

Go to Step 11

--

11

Operate the system in order to verify the repair.

Did you correct the condition?

--

System OK

Go to Step 1

Radio Poor Reception W/ UV7

Step

Action

Value(s)

Yes

No

1

Did you review the system operation?

--

Go to Step 2

Go to Symptoms

2
  1. Turn the radio on.
  2. Using a DMM, backprobe between the radio amplifier module connector C395 terminal A and ground.

Does the voltage equal the specified value?

12 V

Go to Step 4

Go to Step 3

3
  1. With the radio still on.
  2. Using a DMM, backprobe between the radio terminal F3 and ground.

Does the voltage equal the specified value?

12 V

Go to Step 12

Go to Step 9

4

Test for an open in circuit 2208.

Is circuit 2208 open?

--

Go to Step 13

Go to Step 5

5

Inspect the coaxial cable, (between the radio and the radio antenna module).

Is the coaxial cable OK?

--

Go to Step 6

Go to Step 11

6

Inspect front antenna coaxial cable.

Is the coaxial cable OK?

--

Go to Step 7

Go to Step 11

7

Inspect connections between the radio and the radio antenna module.

Are the connections OK?

--

Go to Step 8

Go to Step 14

8

Connect a exterior mast (test antenna) and retest the system.

Does reception improve?

--

Go to Step 10

Go to Step 9

9

Replace the radio. Refer to Radio Replacement for service procedure.

Is the repair complete?

--

Go to Step 15

--

10

Replace the radio antenna module. Refer to Antenna Amplifier Replacement for service procedure.

Is the repair complete?

--

Go to Step 15

--

11

Replace the Appropriate coaxial cable. Refer to Radio Antenna Cable Extension Cable Replacement for service procedure.

Is the repair complete?

--

Go to Step 15

--

12

Repair open in circuit 145.

Is the repair complete?

--

Go to Step 15

--

13

Repair open in circuit 2208.

Is the repair complete?

--

Go to Step 15

--

14

Repair all poor connections.

Is the repair complete?

--

Go to Step 15

--

15

Operate the system in order to verify the repair.

Did you correct the condition?

--

System OK

Go to Step 1