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Code 12This code will flash whenever the diagnostic terminal is grounded with the ignition in run, and the engine off. If this code appears while the engine is running, no reference pulses from the d
Pontiac Fiero Speedometer Wiring and Troubleshooting Guide(Post)Pontiac Fiero Speedometer Wiring and Troubleshooting Guide The speedometer system in the Pontiac Fiero uses a combination of electronic components and wiring to accurately display vehicle speed. Under
How to set Pontiac Fiero Ignition Timing(Post)*Never ground the TACH terminal; serious module and ignition coil damage will result.*Do not come in contact with any spark plug wires while the engine is running. (Ignition system produces 20,000-30,
How the Fiero cooling Fan sytems works(Post)Coolant Sensor Is your Fiero running a bit hot these days? Understand how the Fiero cooling fan system works can help you to quickly know if the cooling fan system is working properly. The first s
The Fiero Subwoofer System - Performance Sound UQ6(Post)Pontiac made the UQ6 Performance Sound system an option on 1986-1988 Fiero. The option code was UQ6. The Fiero Performance Sound UQ6 system was designed to improve the sound quality above t
1990-92 Camaro Speedometer components.(Post)This post is to provide information on the components that may cause the Speedometer to stop working. GM has not made this information easily available. Most of it has come through trial and error and
1990-92 Camaro gauge (instrument) cluster removal and installation(Post)SPORT COUPE MODEL 1. Disconnect the negative battery cable. 2. Remove the instrument cluster bezel. 3. Remove the cluster attachment screws. 4. Pull the cluster out. Disconnect the speedometer cab
Engine Noise Diagnostic Guide: Identifying Knocks, Clicks, and Taps in Classic GM V8s(Post)For classic GM and Pontiac owners, the engine often speaks before it breaks. Learning to "read" these sounds can be the difference between a simple bearing refresh and a catastrophic block failure. ⚠
How to Safely Handle and Install a Replacement Automotive Circuit Board(Post)Replacement tachometer, speedometer, and instrument-cluster circuit boards contain electronic components that can be damaged by static electricity. Proper handling before and during installation help
Trouble shooting the tachometer after the circuit board has been replaced.(Post)Tachometer Still Not Working After Replacing the Circuit Board? If the tachometer still is not working after replacing the circuit board, the problem may be somewhere else in the system. This guide pr