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1999 GMC Truck Yukon PRNDL Display Inaccurate or Inoperative PRNDL Inaccurate Repair Manual

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Did you perform the Instrument Cluster System Check? — Go to Step 2 Go to Instrument Cluster System Check 2 1. Disconnect the Transmission Range (TR) Switch connector C2. 2. Turn the ignition switch to the RUN position. 3. Conduct the PRNDL Logic Input Test by connecting fused jumper wires between ground and the appointed cavities of the TR Switch connector. Refer to PRNDL Logic Input Test PRNDL Logic Input Test . 4. Repeat for each transmission range. Do all ranges illuminate? — Go to Step 3 Go to Step 4 3 Adjust the transmission range switch. Refer to Park/Neutral Position Switch Adjustment (4L60E); Park/Neutral Position Switch Adjustment (4L80E) Automatic Transmissions. Replace the PNP Switch. Refer to Park/Neutral Position Switch Replacement (4L60E); Park/Neutral Position Switch Replacement (4L80E) in Automatic Transmissions. Is the repair complete? — Go to Instrument Cluster System Check — 4 1. Remove the I/P Cluster. 2. Connect a J 39200 DMM (continuity) between the I/P Cluster connector and connector C2 of the TR Switch to those circuit(s) that connected to the faulty PRNDL indicators. Is continuity present in the circuit(s) tested? — Go to Step 6 Go to Step 5 5 Locate and repair the open in the circuit(s) that are faulty between the TR Switch and the I/P Cluster. Refer to Wiring Repairs in Wiring Systems. Is the repair complete? — Go to Instrument Cluster System Check — 6 Connect a J 39200 DMM (continuity) between the I/P Cluster connector and ground to those circuit(s) that connected to the faulty PRNDL indicators. Is continuity present in the circuit(s) tested? — Go to Step 7 Go to Step 8 Locate and repair the short to ground in the circuit(s) that are faulty between the TR Switch and the I/P Cluster. Refer to Wiring 7 Repairs in Wiring Systems. Is the repair complete? — Go to Instrument Cluster System Check — 8 Replace the I/P Cluster. Refer to Instrument Panel Cluster (IPC) Replacement . Is the repair complete?

GM Accessories Headrest DVD System Display Monitor Inoperative (Install Cable Connector Clamps)

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GM Accessories Headrest DVD System Display Monitor Inoperative (Install Cable Connector Clamps) Models: 2004-2007 Buick Rainier 2008 Buick Enclave 2003-2008 Cadillac Escalade Models 2005-2008 Cadillac CTS, SRX, STS 2006-2008 Cadillac DTS 2003-2008 Chevrolet Avalanche, Silverado, Suburban, Tahoe, TrailBlazer Models 2006-2008 Chevrolet Colorado 2007-2008 Chevrolet Equinox, HHR 2003-2008 GMC Envoy Models, Sierra, Yukon Models 2006-2008 GMC Canyon 2007-2008 GMC Acadia 2007-2008 Pontiac Torrent 2005-2008 HUMMER H2 2006-2008 HUMMER H3 2007-2008 Saturn OUTLOOK 2005-2008 Saab 9-7X This bulletin is being revised to update the models affected list. Please discard Corporate Bulletin Number 07-08-44-016 (Section 08 — Body & Accessories). Condition Some customers may comment on an inoperative display monitor or monitors in the GM Accessories Headrest DVD System. Cause This condition may be caused by a loose connection at the display monitor cable connectors. These connectors are located at the lower rear part of both front seats. Two cables are routed to the display monitor in each seat. Correction Do This Don’t Do This Install display monitor cable connector clamps. Do Not replace the DVD system display monitor. Important: A number of headrest monitors have been replaced under warranty and in many cases, no trouble was found by the supplier when these units were analyzed. Therefore, technicians should be checking for loose connections and installing cable connector clamps to ensure a positive and robust connection. Technicians are to install a video cable connector clamp on each cable connector located under each front seat. A total of four cable connector clamps, P/N 19159659, are required for each vehicle. The illustration above shows a pair of display monitor cable connectors without the cable clamps installed.

1996 Pontiac Grand Am DTC P0502 Vehicle Speed Sensor (VSS) Circuit Low Input (3.1L VIN M) Service Manual

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Action Taken When the DTC Sets Conditions for Clearing the MIL/DTC Diagnostic Aids Test Description The numbers below refer to the step numbers on the diagnostic table. 2. This step verifies that the PCM is receiving a signal from the vehicle speed sensor. 3. This step verifies that there are no opens in the circuitry from the vehicle speed sensor to the PCM connector. 7. This step performs a resistance test on the VSS circuits from the PCM connector. • The transmission defaults to 3rd gear. • The PCM inhibits TCC operation. • The PCM illuminates the Malfunction Indicator Lamp (MIL). • The PCM turns OFF the MIL after three consecutive ignition cycles without a failure reported. • A scan tool can clear the DTC from the PCM history. The PCM clears the DTC from the PCM history if the vehicle completes 40 warm-up cycles without a failure reported. • The PCM cancels the DTC default actions when the fault no longer exists and the ignition is OFF long enough in order to power down the PCM. • Check for PRNDL DTC P0705. DTC P0705 affects transmission operation. This may set DTC P0502 falsely. • Check for Electromagnetic Interference (EMI) in circuits 400 and 401. EMI may be induced if the harness is routed along the spark plug wires. • Inspect the wiring for poor electrical connections at the PCM. Inspect the wiring at the TCC brake switch. Look for the following conditions: – A bent terminal – A backed out terminal – A damaged terminal – Poor terminal tension – A chafed wire – A broken wire inside the insulation • When diagnosing for an intermittent short or open condition, massage the wiring harness while watching the test equipment for a change. • Ensure that the VSS is securely tightened to the case extension. DTC P0502 Vehicle Speed Sensor Circuit (VSS) Low Input

1994 Ford Thunderbird LX FUSES AND CIRCUIT BREAKERS MANUAL

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2 – 6-Amp Circuit Breaker Windshield Wiper & Washer Pump, Interval Wiper 3 – Not Used 4 – 15 Amp Taillights, License & Parking Lights, Side Marker & Coach Lights, Cluster Illumination Lights, Radio & Clock Illuminator, A/C-Heater Illumination 5 – 15 Amp Turn Signal & Back-Up Lights, Keyless Entry Illumination, Day/Night Mirror, Turbo Overboost Buzzer 6 – 20 Amp Heated Back Light Control, Deck Lid Release, Electronic Chime Module, Lights Outage & Clock Display, Cornering & Rear Reading Lights, Tripminder, Illuminated Entry, Anti-Theft Module, Radio & Cluster Illumination 7 – 15 Amp Foglights (Turbo Only) 8 – 15 Amp Courtesy & Glove Box Lights, Key Warning Buzzer, Illuminated Entry Module, Remote Electric Mirrors, Electronic Radio & Cluster Memories, Anti-Theft Relay & Clock 9 – 30 Amp A/C-Heater Blower Motor 10 – 20 Amp Horn, Cigarette Lighter, Flash-To-Pass Feature, Fuel Filler Door, Speed Control 11 – 20 Amp Radio, Power Antenna, Sound Amplifier 12 – 20-Amp Circuit Breaker Power Seat & Door Locks, Keyless Entry, Fuel Filler Door Lock 13 – 5 Amp Instrument Cluster, Radio, Climate Control, Instrument Panel Illumination 14 – 20-Amp Circuit Breaker Power Windows, Power Moon Roof 15 – 10 Amp Taillights, Parking Lights, License & Coach Lights 16 – 4 Amp EATC Memory, Horn, Cigarette Lighter 17 – 15 Amp Electronic Cluster Tripminder, Fuel Gauge, A/C Clutch, Speed Control Module, Graphic Warning Module 18 – 10 Amp Warning Indicator Lights, Auto Light System, Electronic Chimes, Low Washer Fluid Light, Low Fuel Module, Throttle Solenoid Positioner, Low Oil Relay, Tachometer, Flash-To-Pass Relay

1986 Ford Truck F 150 2WD Pickup Emission Maintenance Warning Module-Service Manual

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EMISSION MAINTENANCE WARNING MODULE SERVICE INFORMATION ^LAMP – “EMISSIONS/CHECK ENGINE” – EMISSION MAINTENANCE WARNING MODULE – SERVICE INFORMATION LIGHT TRUCK: 1985-89 BRONCO 1985-87 BRONCO II 1985-89 ECONOLINE, F- 150, F-250, F-350 1985-88 RANGER 1986-87 AEROSTAR ISSUE: The Emission Maintenance Warning “EMW” module operates a light that is located on the instrument panel. For 1985-87 model year vehicles, the light will display the word “EMISSIONS”. For 1988-89 model year vehicles, the light will display the words “CHECK ENGINE”. When the light is lit, it is indicating that the 60,000 mile emission maintenance should be performed. After the maintenance is performed the EMW module must be reset to zero time. Another type of module is the “IMS” module. This module is not part of the light circuit and does not require maintenance. At a predetermined time, the IMS module directs the EEC IV processor to make a strategy change. A third type of module is the “COMBO” module. This module combines the functions of the IMS and the EMW modules. ACTION: Refer to the following module application charts for the specific vehicle application and location of the different types of modules. NOTE: FOR APPLICATIONS NOT LOSTED IN THE FOLLOWING MODULE APPLICATION CHARTS, THE “CHECK ENGINE” LIGHT IS CONTROLLED BY THE EEC IV PROCESSOR. THESE VEHICLES DO NOT USE THE “EMW” MODULE