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Cards are back in stock at Hillbilly Wizard.

Cards will be available from Hillbilly Wizard for the foreseeable future.

It is the black 3 terminal component that is affixed to the board with the rivet. It's next to the index slot on the card edge connector.

The new cards are available thru Hill Billy Wizard. The transistor in question is the part that is riveted to the board. Looks like that board was made around Nov 1985

I believe the card needs replaced or repaired. The card is not sending the ground command to the relay.

It will show continuity to ground for the duration of the Wait period and it may stay on for a little while longer. The length of time it stays on is determined by several factors, mainly engine temperature. Your procedure is correct for testing the ground command from the GP card. New cards...

Sounds like you lost the transistor that provides the ground command to the GP relay. Disconnect the light Blue wire from the GP relay. When the card is functioning properly, this wire will pull to ground. Check to see if that is occurring during the Wait light period with an ohm meter.