1999 Oldsmobile Alero Logo

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Posted on Jan 17, 2009
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Center brake light works but regular brake lights out

Need schematic,are there seperate wires and fuses ,how about color codes.have checked fuse box and fuses. Apears it could have different wire colors at brake lights than at trunk light , is this correct?
Is this a common problem with a 1999 Alero.
Are there connection points between the fuse box and the connections in the trunk,
is a schematic available?

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  • jcnickens Jan 17, 2009

    need colors to trace,are there different wires going to brake lights than to trunk brake light?Are they connected at all?

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  • Posted on Jan 17, 2009
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Hi!
For your alero1999 the connections are like this
Constant 12V+ Red (2) Ignition Switch Harness Starter Yellow Ignition Switch Harness or Top Harness going through Firewall Ignition Pink Ignition Switch Harness Ignition 2 Orange Ignition Switch Harness Ignition 3 Dark Green Ignition Switch Harness Accessory Brown Ignition Switch Harness Tach White Coil Neutral Safety Wire Orange/Black (-) Behind Driver's Dash left of Column Brake Switch Light Blue Brake Switch Trunk Release Light Blue (-) Grey 16 Pin Connector Position B3 Trunk Pin Orange/Black (+) Wire in Trunk Parking Lights Brown (+) Gray 16 Pin Connector of BCM under Passenger's Dash Head Lamp Dark Blue (-) Left Side of Engine Junction Block Door Trigger Green/Black (-) LF Light Blue other Doors BCM under Passenger's Dash Door Lock Light Blue (+) BCM Pin A8 Pink Connector Positive Trigger Door Unlock White (+) BCM Pin B3 Pink Connector see notes Driver's Lock Gray Driver's Kick Panel Driver's Unlock Tan Driver's Kick Panel Passenger Unlock Tan Passenger's Kick Panel Horn Wire Black (-) Steering Column Windows Up LF=Gray, RF=Tan, LR=Dark Green, RR=Light Green Windows Down LF=Light Blue, RF=Dark Green, LR=Purple/White, RR=Purple

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  • Master 2,920 Answers
  • Posted on Jan 17, 2009
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Have you tried changing the bulbs? they could be burnt..the wiring runs from the back of the car to the brake switch at the brake pedal and to the fuse box. you can check the fuses siply by finding the one for the brakes and seeing if its burnt or not

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Welcome to Fixya! The 3rd Brake light is Connected to the Power on Wire to the Brakes. But, They are Fused Seperatley on Some Models. Check the Fuses Really Close again. Sometimes they will connect the 3rd BL into An "aux". Use a Flashlight and you can see the Fuses Better.

  • Anonymous Jan 17, 2009

    Inside the Trunk, Just trace the Upper 2 Wires that come out of the Harness and go along the Inside Fender. There is only one Bundle coming from this area.

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  • Posted on Jan 17, 2009
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Yes its definately a connection problem.reverse connections and check.

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good set of facts,
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im reading the cars SM schematic now.
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