1985-88 Fiero Tachometer Circuit Board

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1985-88 Pontiac Fiero Tachometer Circuit Board.

Optional diagnostic assist LED indicators.

Easy and ready to install direct replacement.

  • Pre-Calibrated for 4 cylinder , 6 cylinder, or 8 cylinder (with compatible engine swap) { option selected above}
  • Ready to install.
  • Easy bolt on installation - no soldering or special tools required.
  • Direct replacement for the original GM Circuit Board.
  • Includes installation instructions.
  • Manufactured in the USA with top quality components.
  • Diagnostic LED indicators option. Choose if you want the LED indicators enabled{ option selected above}


  • 1985-88 Pontiac Fiero with 4 cylinder or 6 cylinder engine with Tachometer & Oil pressure gauge cluster
  • 1986-88 Pontiac Fiero with 6 cylinder engine with only the tachometer (no voltage gauge or oil pressure gauge in the tachometer)
  • 8 cylinder available for Fiero with V8 Engine swap
  • Will not work for Fiero with voltage gauge


  1. What is an LED? It is a Light Emitting Diode.
  2. What is the Diagnostic LED option for? The diagnostic LED's can be used to help diagnose Tachometer circuit problems (more details below).
  3. What is the difference between the circuit board with LED's and without LED's?  The circuit board with the LED's has the Diagnostic LED circuits installed. The circuit board without the LED option does not have the Diagnostic LED circuits installed
  4. Will this work with my original tachometer and gauge cluster?  Yes. Installation is simple unbolt the old circuit board from the tachometer, and bolt the new circuit board on to the tachometer.

arrow.png Watch our demonstration video.

LED Indicators option (If selected when ordering):
If you ordered the LED indicator option, the LED's can be used to help diagnose Tachometer circuit problems. They indicate if the power circuit is completed and if the RPM signal circuit is completed respectively. For example, If the RPM signal was nonexistent, the LED would not light. If the signal was intermittent, the LED may flicker. If the circuit board was not receiving power, the Power LED indicator would not light. In this way the LED's are useful to help with diagnosing tachometer problem related to the power and RPM circuits.

For 1984 Fiero with voltage gauge see: 1984 Fiero Tachometer Circuit Board. Tachometer with voltage gauge


Easy checkout, fast shipping!

Limited 1 year warranty. 456607583
Direct replacement
Pre-Calibrated and Ready to install
1985-88 Fiero
4,6,8 (engine swap), cylinder
LED indicators

1 Review Hide Reviews Show Reviews

  • 5
    Great part

    Posted by Mike Stevens on 30th Sep 2021

    Almost too pretty to install, LOL. Worked great! Thanks for the lightning fast shipping.

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