1999 Chevy Astro key fob won't program

1999 CHEVROLET ASTRO
146,000 MILES • 6 CYL • 2WD • AUTOMATIC
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ANDRESATS
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I just got a new fob for my van. I had it tested (using a GM fob tester) and saw the lights light up(on the tester) when the buttons were pushed on my fob. I then followed the instructions to short pin #4 to pin #8 on my OBD II aldl connector (top row, 4th from left and very right). The locks cycled as expected and then I pressed the fob buttons (lock & unlock together) for more than the requested 10 seconds, but nothing happened. I repeated the attempt with the ignition on and off with no success. My Snap-On Modis doesn't help me here either. Suggestions?
Feb 9, 2008 at 2:55 PM
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MERLIN2021
  • CAR REPAIR CONTRIBUTOR
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Here's what I came up with...


https://images.2carpros.com/forum/automotive_pictures/62217_Fob1_1.jpg


https://images.2carpros.com/forum/automotive_pictures/62217_Fob2_1.jpg


https://images.2carpros.com/forum/automotive_pictures/62217_Fob3_1.jpg

Feb 9, 2008 at 3:05 PM
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ANDRESATS
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Merlin2021,
I will take the diagnostic proceedure to work with me, tomorrow, and give it a try. Thanks for getting back to me.
//andresats//
Feb 10, 2008 at 2:56 PM
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MERLIN2021
  • CAR REPAIR CONTRIBUTOR
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Let me know the results please...
Feb 10, 2008 at 4:23 PM
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