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2005 Chevrolet TrailBlazer - Page 4 Questions & Answers
05 Trailblazer transmission says neutral but gear shiftier is locked in park.
Automatic Transmission Shift Lock Control System
The automatic transmission shift lock control system is a safety device that prevents an inadvertent shift out of PARK when the engine is running. The driver must press the brake pedal before moving the shift lever out of the PARK position. The system consists of the following components:
• The automatic transmission shift lock control solenoid
• The automatic transmission shift lock control switch
With the ignition in the ON position, voltage is supplied to automatic transmission shift lock control switch. Voltage flows through the normally closed contacts of the automatic transmission shift lock control switch to the automatic transmission shift lock control solenoid. The automatic transmission shift lock control solenoid is permanently grounded. This energizes the automatic transmission shift lock control solenoid causing the transmission shift lever to be physically locked in the PARK position. When the brake pedal is pressed the contacts in the automatic transmission shift lock control switch open, de-energizing the automatic transmission shift lock control solenoid. This allows the shift lever to be move out of the PARK position.
Circuit Description
The transmission range (TR) switch is part of the park/neutral position (PNP) and back-up lamp switch assembly, which is externally mounted on the transmission manual shaft. The TR switch contains four internal switches that indicate the transmission gear range selector lever position. The powertrain control module (PCM) supplies ignition voltage to each switch circuit. As the gear range selector lever is moved, the state of each switch may change, causing the circuit to open or close. An open circuit or switch indicates a high voltage signal. A closed circuit or switch indicates a low voltage signal. The PCM detects the selected gear range by deciphering the combination of the voltage signals. The PCM compares the actual voltage combination of the switch signals to a TR switch combination chart stored in memory.
These are all electronically controlled , yur best bet would be to take your vehicle to the dealer .
2005 trail blazer-power windows won't work and a/c only blows from the bottom
All the power windows are inoperative ?
Power Window System Components
The power window system consists of the following components:
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Driver door module (DDM)
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Passenger door module (PDM)
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Body control module (BCM)
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LR power window switch
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RR power window switch
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Window up and window down relays in each of the rear passenger window switches
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Window lockout switch
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Reversible power window motors in each of the doors (circuit breaker protected)
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LT DOOR CB 25A (System power for left rear window)
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RT DOOR CB 25A (System power for right rear window)
Are you aware of the electronics involved ? control modules - computers ? Are you good diagnosing electrical problems . Do you own a professional scan tool ?
- Install a scan tool.
- Monitor the Driver Window Status Data parameter in the driver door inputs list.
Does the Driver Window Status Data parameter display an active state?
Your best bet would be to take your vehicle to a qualified repair shop . For both problems .
The Trainer 24 Power Window Troubleshooting
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