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Blower Motor Does Not Operate

WARNING: This page is about a different car, the 1999 Pontiac Firebird and 1999 Chevrolet Camaro. However, it is still accessible from the selected car via links, so may be relevant.
  1. Turn ignition switch to RUN position. Set mode selector switch to vent position. Using test light, backprobe blower switch between 5-pin connector terminal "E" (Light Green wire) and ground. If test light illuminates, go to step  4 . If test light does not illuminate, go to next step.
  2. Using test light, backprobe mode selector switch between 3-pin connector terminal "C" (Brown wire) and ground. If test light illuminates, go to next step. If test light does not illuminate, repair open Brown wire between HVAC (20-amp) fuse in instrument panel fuse block and mode selector switch 3-pin connector terminal "C". If Brown wire and terminals are okay, replace mode selector switch.
  3. Check for open Light Green wire between mode selector switch 3-pin connector terminal "B" and blower switch 5-pin connector terminal "E". Also check for poor connections at mode selector switch 3-pin connector terminals "B" or "C". If Light Green wire and terminals are okay, replace mode selector switch.
  4. Leave ignition switch in RUN position. Set blower switch to low speed position. Using test light, backprobe blower switch between connector terminal "A" (Yellow wire) and ground. If test light illuminates, go to next step. If test light does not illuminate, check for poor connection at blower switch connector terminal "A" (Yellow wire). If connection is okay, replace blower switch.
  5. Turn ignition switch to OFF position. Disconnect blower motor relay. Connect a fused jumper wire between blower motor relay terminals B2 (Dark Blue wire) and C1 (Purple wire). Ensure ignition switch is in RUN position, mode selector switch in vent position, and blower switch in low speed position. If blower motor does not operate, go to next step. If blower motor operates, check for poor connections at blower motor relay. If connections are okay, replace blower motor relay.
  6. Leave jumper wire connected. Disconnect blower motor connector. Connect test light between blower motor connector terminals "A" (Black wire) and "B" (Purple wire). If test light does not illuminate, go to next step. If test light illuminates, check for poor connections at blower motor. If connections are okay, replace blower motor.
  7. Leave jumper wire connected. Connect test light between blower motor connector terminal "B" (Purple wire) and ground. If test light illuminates, repair poor connection or open Purple wire between blower motor connector terminal "B" and blower motor relay connector terminal C1. If test light does not illuminate, go to next step.
  8. Repair poor connection or open Black wire between blower motor connector terminal "A" and ground connector located near right "A" pillar, bolted to instrument panel mounting stud behind kick panel.
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