GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Cadillac 🢒 1999 🢒 Eldorado 🢒 Body and Accessories 🢒 Entertainment 🢒 Antenna Inoperative

Step

Action

Value(s)

Yes

No

1

Did you perform the Power Antenna System Check?

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Go to Step 2

Go to Power Antenna System Check

2
  1. Disconnect the power antenna relay connector C1.
  2. Turn the ignition switch to the RUN position.
  3. Turn the ON radio.
  4. Measure the voltage from the power antenna relay connector C1 terminal A to ground.

Is the voltage within the specified range?

10-15 V

Go to Step 3

Go to Step 6

3
  1. Disconnect the power antenna relay connector C2.
  2. Measure the resistance from the power antenna connector terminal C to ground (antenna side).

Is the resistance within the specified range?

0-5 ohms

Go to Step 16

Go to Step 4

4

Measure the resistance from the power antenna connector terminal B to ground (antenna side).

Is the resistance within the specified range?

0-5 ohms

Go to Step 16

Go to Step 5

5

Measure the resistance from the power antenna connector terminal A to ground (antenna side).

Is the resistance within the specified range?

0-5 ohms

Go to Step 16

Go to Step 7

6

Repair the open or short to ground in CKT 2140 (ORN).

Did you complete the repair?

--

Go to Power Antenna System Check

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7

Measure the voltage from the power antenna relay connector C1 terminal A to C.

Is the voltage within the specified range?

10-15 V

Go to Step 9

Go to Step 8

8

Repair the open in CKT 1250 (BLK).

Did you complete the repair?

--

Go to Power Antenna System Check

--

9

Measure the voltage from the power antenna relay connector C1 terminal B to C.

Is the voltage within the specified range?

10-15 V

Go to Step 13

Go to Step 10

10

Inspect for an open in CKT 145 (DK GRN).

Is there an open?

--

Go to Step 11

Go to Step 12

11

Repair the open in CKT 145 (DK GRN).

Did you complete the repair?

--

Go to Power Antenna System Check

--

12

Replace the radio. Refer to one of the flowing:

    •  Radio Replacement
    •  Radio Replacement

Did you complete the repair?

--

Go to Power Antenna System Check

--

13
  1. Turn the ignition switch off.
  2. Reconnect the power antenna relay connector C1.
  3. Disconnect the power antenna relay connector C2.
  4. Turn on the ignition switch.
  5. Measure the voltage from the power antenna relay cavity B to A.

Is the voltage within the specified range?

10-15 V

Go to Step 14

Go to Step 15

14
  1. Turn the radio off.
  2. Measure the voltage from the power antenna relay cavity B to C.

Is the voltage within the specified range?

10-15 V

Go to Step 16

Go to Step 15

15

Replace the power antenna relay.

Did you complete the repair?

--

Go to Power Antenna System Check

--

16

Replace the power antenna. Refer to one of the flowing:

Did you complete the repair?

--

Go to Power Antenna System Check

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