Lighting, Interior

PINPOINT TEST A: COURTESY LAMP(S) DOES NOT TURN ON WHEN ONE DOOR IS OPENED — OK WHEN OTHER DOORS ARE OPENED

A1 CHECK POWER

• Check for power at door switch.

• Does power show at door switch?

SERVICE power circuit back to fuse.

Yes
GO to A2.

 

A2 CHECK THE DOOR SWITCH

• Check the door switch for proper operation.

• Does door switch operate properly?

No
REPLACE switch.

Yes
SERVICE the circuit from the switch to the lamp(s).

 

PINPOINT TEST B: COURTESY LAMP(S) DOES NOT COME ON WHEN HEADLAMP SWITCH IS TURNED COUNTERCLOCKWISE TO STOP

 

B1 VERIFY CONDITION

• Check bulbs.

• Are bulbs good?

No
REPLACE bulb(s).

Yes
GO to B2.

 

B2 CHECK OPERATION OF DOOR SWITCHES

• Check to see if courtesy lamps operate from door switches.

• Are lamps activated by door switches?

No
PERFORM Pinpoint Test C.

Yes
GO to B3.

 

B3 CHECK FOR POWER

• Check for power at headlamp switch.

• Does headlamp switch have power?

No
SERVICE circuits back to fuse panel.

Yes
GO to B4.

 

B4 CHECK FOR CONTINUITY

• Check continuity of headlamp switch.

• Is there continuity?

No
REPLACE headlamp switch.

Yes
SERVICE circuits from switch to lamp(s).

  

PINPOINT TEST C: COURTESY LAMP(S) DOES NOT COME ON WHEN ALL DOORS ARE OPEN

 

C1 VERIFY CONDITION

• Check courtesy lamps.

• Is there more than one courtesy lamp?

Yes
GO to C5 .

No
GO to C2 .

 

C2 CHECK OPERATION OF FUSE CIRCUIT

• Check operation of other circuits that share the same fuse.

• Are all circuits from same fuse good?

Yes
GO to C3 .

No
GO to C5 .

 

C3 CHECK FOR POWER

• Check for power to bulb.

• Does bulb illuminate?

Yes
GO to C4 .

No
SERVICE circuit between bulb and common point with other circuits.

 

C4 CHECK CONTINUITY

• Check continuity of bulb.

• Is there continuity?

Yes
SERVICE bulb ground.

No
REPLACE bulb.

 

C5 CHECK FUSE

• Check courtesy lamp fuse(s).

• Are courtesy lamp fuse(s) good?

Yes
GO to C6 .

No
REPLACE fuse. If fuse blows again, CHECK for shorted circuit(s).

 

C6 CHECK FOR POWER

• Check for power through the fuse.

• Is there power to the fuse?

Yes
SERVICE open circuit between fuse and common point in courtesy lamp power circuit(s).

No
SERVICE power feed circuit.

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