1984-1989 IC U9 EPROM PROM ROM

1984-1989 IC U9 EPROM PROM ROM

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It is common for power supply failures and 24V jump starts to damage the factory IC U9.  When U9 dies, the cluster doesn't boot, resulting in a flashing approximately every 0.5-1.0 seconds.  If there's a short on the 5V rail, or if your U9 IC gets hot to the touch, this probably needs to be replaced.

This is a new replacement for the factory ROM, referred to as U9 on the schematic.   This product is manufactured by batee.com!

Factory Schematic can be found here .

Make sure to get the one for your year cluster!  Match the number on the chip to the number in the drop-down box on this page!