GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Buick 🢒 1999 🢒 Riviera 🢒 Body and Accessories 🢒 Retained Accessory Power 🢒 Retained Accessory Power (RAP) Inoperative

Step

Action

Value(s)

Yes

No

1

Did you perform the RAP system check?

--

Go to Step 2

Go to Retained Accessory Power (RAP) System Check

2
  1. Turn the ignition switch to the RUN position.
  2. Close all of the doors.
  3. Measure voltage from the DAB ACSRY (RAP) relay terminal B5 to ground.

Is the value within the specified range?

10-15 V

Go to Step 3

Go to Step 4

3

Measure voltage from the DAB ACSRY (RAP) relay terminal C5 to ground.

Is the value within the specified range?

10-15 V

Go to Step 6

Go to Step 7

4

Test the CKT 1342 (RED) wiring for an open or short to ground.

Is there an open or short to ground?

--

Go to Step 5

Go to Retained Accessory Power (RAP) System Check

5

Repair the open or short to ground.

Is the repair complete?

--

Go to Retained Accessory Power (RAP) System Check

--

6

Measure voltage from the DAB ACSRY (RAP) relay terminal B6 to ground.

Is the value within the specified range?

10-15 V

Go to Step 9

Go to Step 10

7

Test the CKT 40 (ORN) wiring for an open or short to ground.

Is there an open or short to ground?

--

Go to Step 8

Go to Retained Accessory Power (RAP) System Check

8

Repair the open or short to ground.

Is the repair complete?

--

Go to Retained Accessory Power (RAP) System Check

--

9
  1. Close the doors.
  2. Turn the ignition switch to the OFF position.
  3. Cycle the IGN switch to the RUN position.
  4. Cycle the IGN switch to the OFF position.
  5. Measure voltage from the DAB ACSRY (RAP) relay terminal C5 to terminal B7.

Is the value within the specified range for approximately 10 minutes than open?

10-15 V

Go to Step 15

Go to Step 18

10

Test the following circuits for an open or short to ground:

    • CKT 4 (BRN)
    • CKT 1342 (RED)

Is there an open or short to ground?

--

Go to Step 11

Go to Step 12

11

Repair the open or short to ground.

Is the repair complete?

--

Go to Retained Accessory Power (RAP) System Check

--

12

Ensure that the following C202 terminals are clean and tight:

    • Terminal D6
    • Terminal D2

Are the terminals clean and tight?

--

Go to Step 14

Go to Step 13

13

Repair the terminals.

Is the repair complete?

--

Go to Retained Accessory Power (RAP) System Check

--

14

Replace the ignition switch.

Is the repair complete?

--

Go to Retained Accessory Power (RAP) System Check

--

15

Ensure that the DAB ACSRY (RAP) relay terminals are clean and tight.

Are the terminals clean and tight?

--

Go to Step 17

Go to Step 16

16

Repair the terminals.

Is the repair complete?

--

Go to Retained Accessory Power (RAP) System Check

--

17

Replace the DAB ACSRY (RAP) relay.

Is the repair complete?

--

Go to Retained Accessory Power (RAP) System Check

--

18
  1. Turn the ignition switch to the OFF position.
  2. Disconnect the RFA connector.
  3. Turn the ignition switch to the RUN position.
  4. Measure voltage from the RFA connector terminal F15 to ground.

Is the value within the specified range?

10-15 V

Go to Step 19

Go to Step 20

19

Measure voltage from the RFA module connector terminal F15 to terminal F16.

Is battery voltage present?

--

Go to Step 22

Go to Step 23

20

Test the CKT 143 (YEL) wiring for an open or short to ground.

Is there an open or short to ground?

--

Go to Step 21

Go to Retained Accessory Power (RAP) System Check

21

Repair the open or short to ground.

Is the repair complete?

--

Go to Retained Accessory Power (RAP) System Check

--

22

Measure voltage from the RFA module connector terminal E16 to terminal F16.

Is the value within the specified range?

10-15 V

Go to Step 25

Go to Step 26

23

Test the CKT 1050 (BLK) wiring for an open or short to battery.

Is there an open or short to battery?

--

Go to Step 24

Go to Retained Accessory Power (RAP) System Check

24

Repair the open or short to battery.

Is the repair complete?

--

Go to Retained Accessory Power (RAP) System Check

--

25

Measure voltage from the RFA module connector terminal E15 to terminal F16.

Is the value within the specified range?

10-15 V

Go to Step 28

Go to Step 29

26

Test the CKT 40 (ORN) wiring for an open or short to ground.

Is there an open or short to ground?

--

Go to Step 27

Go to Retained Accessory Power (RAP) System Check

27

Repair the open or short to ground.

Is the repair complete?

--

Go to Retained Accessory Power (RAP) System Check

--

28
  1. Close all of the doors.
  2. Measure the resistance from the RFA module connector terminals E10 and E12 to terminal F16.

Is the value within the specified range?

LO (Infinite)

Go to Step 31

Go to Step 34

29

Test the CKT 39 (PNK) wiring for an open or short to ground.

Is there an open or short to ground?

--

Go to Step 30

Go to Retained Accessory Power (RAP) System Check

30

Repair the open or short to ground.

Is the repair complete?

--

Go to Retained Accessory Power (RAP) System Check

--

31

Ensure that the RFA terminals are clean and tight.

Are the terminals clean and tight?

--

Go to Step 33

Go to Step 32

32

Repair the terminals.

Is the repair complete?

--

Go to Retained Accessory Power (RAP) System Check

--

33

Replace the RFA module.

Is the repair complete?

--

Go to Retained Accessory Power (RAP) System Check

--

34

Test the CKT 49 (DK BLU) and CKT 126 (TAN) wiring and the door switches for a short to ground.

Is there a short to ground?

--

Go to Step 35

Go to Retained Accessory Power (RAP) System Check

35

Repair the short to ground.

Is the repair complete?

--

Go to Retained Accessory Power (RAP) System Check

--