Computer Diagnostics and Tuning Technical discussion on diagnostics and programming of the F-body computers

TA's got problems

Old Jul 7, 2004 | 10:26 PM
  #1  
a_z28_vance's Avatar
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TA's got problems

I was driving the car out of my neighborhood, when I noticed that the gauges were not working. I was coming up on a stop sign, I pushed the clutch in and the car dies. Gauges were not working and there were no SES lights. I try to restart the car and nothing. Not even a click like the car is trying to turn over. The radio works, windows and antenna go up and down, the headlights even work. I pulled every fuse in the car and none of them are blown. I pulled the battery out and took it to Autozone to have tested and the battery is good.

We pushed the car and popped the clutch and the car started up just fine, but the gauges were not working. The instrument lights work, but the right blinker light is on(not flashing). I drove the car home, turned it off, and tried to restart it and it did the same thing as before. No click, no starter trying to turn over, and the gauges didn't turn on.

After the car cooled down, I jacked up the car and checked underneath for any loose or burnt wires, but found nothing. We tried to reset the computer by pulling the fuses and waiting 5 minutes but that didn't help. Any suggestions??

Coincedence: Yesterday Firebat and I installed a Harlan shift light. We did not have to do any wiring, since the previous owner(Sporadic on ls1tech) had one installed and left all the wires and all we had to do was plug-program and play. The car ran like a champ all day long yesterday with no issues.
Old Jul 7, 2004 | 10:29 PM
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Double check the PCM fuses. On 98-up cars, the instrument cluster is a multiplex setup that uses one wire from the PCM to tell the gauges what to do. Make sure the PCM is plugged in well then look towards the PCM. Almost sounds like the security system is keeping you from starting...

Ryan
Old Jul 7, 2004 | 10:34 PM
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I went through all 3 fuse box locations twice. I started switching all the fuses around and still nothing.

Security system as in the VATS? Is there a way to bypass(disconnect) the system?
Old Jul 8, 2004 | 07:41 AM
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I am sure there is a way but I don't know how; on the 97 up, the security and fuel command is done by the Body Control Module.

Ryan
Old Jul 10, 2004 | 01:26 PM
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anyone have this kind of problem?
Old Jul 11, 2004 | 01:09 AM
  #6  
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According to http://www.thirdgen.org/newdesign/tech/vats.shtml if the VATS failed, the car cannot be pushed started.
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