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For 1990-2009 cars only
Makes 🢒 Cadillac 🢒 1999 🢒 Catera 🢒 Body and Accessories 🢒 Seats 🢒 Heated Seat Inoperative - Rear

Heated Seat Inoperative - Rear LH

Step

Action

Value(s)

Yes

No

1

Did you perform the Heated Seat System Check?

--

Go to Step 2

Go to Heated Seats System Check .

2
  1. Disconnect the LH rear seat cushion heater relay K65 connector.
  2. Use the DMM in order to measure the voltage between terminal 2 of the LH rear seat heater relay K65 connector and a known good ground.

Is the measured voltage within the specified value?

B+

Go to Step 4

Go to Step 3

3
  1. Locate an open or high resistance in circuit A2.
  2. Repair the open or the high resistance in circuit A2.

Is the repair complete?

--

Go to Step 15

--

4
  1. Turn the ignition switch to the ON position.
  2. Use the DMM in order to measure the voltage between terminal 6 of the LH rear seat cushion heater relay K65 connector.

Is the measured voltage within the specified value?

B+

Go to Step 6

Go to Step 5

5
  1. Locate an open or high resistance in circuit X2.
  2. Repair the open or the high resistance in circuit X2.

Is the repair complete?

--

Go to Step 15

--

6

Use the DMM in order to measure the resistance between terminal 4 of the LH rear seat cushion heater relay K65 connector and a known good ground.

Is the measured resistance less than the specified value?

5 ohms

Go to Step 8

Go to Step 7

7
  1. Locate an open or a high resistance in circuit F2.
  2. Repair the open or the high resistance in circuit F2.

Is the repair complete?

--

Go to Step 15

--

8
  1. Press the LH rear seat heater switch.
  2. Use the DMM in order to measure the voltage between terminal 5 of the LH rear seat cushion heater relay K65 connector and a known good ground while holding the LH rear seat heater switch.

Is the measured voltage within the specified value?

B+

Go to Step 10

Go to Step 9

9
  1. Locate an open or a high resistance in circuits FM300 and FM1.
  2. Repair the open or the high resistance in circuits FM300 and FM1.
  3. Replace the LH rear seat heater switch if these circuits are OK. Refer to Front Seat Heater Switch Replacement .

Is the repair or replacement complete?

--

Go to Step 15

--

10
  1. Connect the LH rear seat cushion heater relay K65.
  2. Disconnect the LH rear seat cushion heater connector.
  3. Press the LH rear seat heater switch.
  4. Use the DMM in order to measure the voltage between terminal 2 of the LH rear seat cushion heater connector and a known good ground.

Is the measured voltage within the specified value?

B+

Go to Step 12

Go to Step 11

11
  1. Locate an open or a high resistance in circuits FB1 and/or FB4.
  2. Repair the open or the high resistance in circuits FB1 and/or FB4.
  3. Replace the LH rear seat cushion heater relay K65 if these circuits are OK. Refer to Rear Seat Cushion Heater Relay Replacement .

Is the repair or replacement complete?

--

Go to Step 15

--

12

Use the DMM in order to measure the resistance between terminal 1 of the LH rear seat cushion heater connector and a known good ground.

Is the measured resistance less than the specified value?

5 ohms

Go to Step 14

Go to Step 13

13
  1. Locate an open or a high resistance in circuit F5.
  2. Repair the open or the high resistance in circuit F5.

Is the repair complete?

--

Go to Step 15

--

14

Replace the LH rear seat cushion heater and/or the LH rear seat back cushion heater. Refer to Rear Seat Cushion Heater Replacement .

Is the replacement complete?

--

Go to Step 15

--

15
  1. Connect all connectors and components that were disconnected.
  2. Verify that the LH rear heated seat operates properly.

Does the LH rear heated seat operate properly?

--

System OK

Go to Step 1

Heated Seat Inoperative - Rear RH

Step

Action

Value(s)

Yes

No

1

Did you perform the Heated Seat System Check?

--

Go to Step 2

Go to Heated Seats System Check .

2
  1. Disconnect the RH rear seat cushion heater relay K66 connector.
  2. Use the DMM in order to measure the voltage between terminal 2 of the RH rear seat cushion heater relay K66 connector and a known good ground.

Is the measured voltage within the specified value?

B+

Go to Step 4

Go to Step 3

3
  1. Locate an open or high resistance in circuit A3.
  2. Repair the open or the high resistance in circuit A3.

Is the repair complete?

--

Go to Step 15

--

4
  1. Turn the ignition switch to the ON position.
  2. Use the DMM in order to measure the voltage between terminal 6 of the RH rear seat cushion heater relay K66 connector.

Is the measured voltage within the specified value?

B+

Go to Step 6

Go to Step 5

5
  1. Locate an open or high resistance in circuit X3.
  2. Repair the open or the high resistance in circuit X3.

Is the repair complete?

--

Go to Step 15

--

6

Use the DMM in order to measure the resistance between terminal 4 of the RH rear seat cushion heater relay K66 connector and a known good ground.

Is the measured resistance less than the specified value?

5 ohms

Go to Step 8

Go to Step 7

7
  1. Locate an open or a high resistance in circuit F3.
  2. Repair the open or the high resistance in circuit F3.

Is the repair complete?

--

Go to Step 15

--

8
  1. Press the RH rear seat heater switch.
  2. Use the DMM in order to measure the voltage between terminal 5 of the RH rear seat cushion heater relay K66 connector and a known good ground while holding the RH rear seat heater switch.

Is the measured voltage within the specified value?

B+

Go to Step 10

Go to Step 9

9
  1. Locate an open or a high resistance in circuits FM31 and FM2.
  2. Repair the open or the high resistance in circuits FM31 and FM2.
  3. Replace the RH rear seat heater switch if these circuits are OK. Refer to Rear Seat Heater Switch Replacement .

Is the repair or replacement complete?

--

Go to Step 15

--

10
  1. Connect the RH rear seat heater relay K66.
  2. Disconnect the RH rear seat cushion heater connector.
  3. Press the RH rear seat heater switch.
  4. Use the DMM in order to measure the voltage between terminal 2 of the RH rear seat cushion heater connector and a known good ground.

Is the measured voltage within the specified value?

B+

Go to Step 12

Go to Step 11

11
  1. Locate an open or a high resistance in circuits FA1 and FA3.
  2. Repair the open or the high resistance in circuits FA1 and FA3.
  3. Replace the RH rear seat cushion heater relay K66 if these circuits are OK. Refer to Rear Seat Cushion Heater Relay Replacement .

Is the repair or replacement complete?

--

Go to Step 15

--

12

Use the DMM in order to measure the resistance between terminal 1 of the RH rear seat cushion heater connector and a known good ground.

Is the measured resistance less than the specified value?

5 ohms

Go to Step 14

Go to Step 13

13
  1. Locate an open or a high resistance in circuit F4.
  2. Repair the open or the high resistance in circuit F4.

Is the repair complete?

--

Go to Step 15

--

14

Replace the RH rear seat cushion heater and/or the RH rear seat back cushion heater. Refer to Rear Seat Cushion Heater Replacement .

Is the replacement complete?

--

Go to Step 15

--

15
  1. Connect all connectors and components that were disconnected.
  2. Verify that the RH rear heated seat operates properly.

Does the RH rear heated seat operate properly?

--

System OK

Go to Step 1