1991 Chevy Cheyenne CODES

Tiny
CHEVYCHY
  • MEMBER
  • 1991 CHEVROLET CHEYENNE
  • V8
  • 2WD
  • AUTOMATIC
  • 300,549 MILES
I GET A CODE 9 OR MY BRAKE LIGHT FLASHES 9 TIMES I HAVE REPLACED THE FRONT CALIPERS AND HOSES, PLUS NEW PADS AND STILL THE BRAKE LIGHT AND PARCKING LIGHT COME ON AND FLASH 9 TIMES, I AM A GOOD DO IT YOURSELF I JUST NEED THAT CODE OR WHAT CAN I DO , IT IS INTAKE MANIFOLD VACUUM IF THAT HELPS
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Wednesday, April 29th, 2009 AT 6:44 PM

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Tiny
OBXAUTOMEDIC
  • EXPERT
Hello,

You are talk about the exterior brake and parking lights right. If so then you have another problem. Is your Check Engine light on? if so here is how to pull codes...

To extract a trouble from the computer for diagnostic purposes, the Assembly Line Communication Link (ALDL) connector is used.

Ground terminals A and B with the ignition "ON" and engine not running. The system will enter the diagnostic mode. In this mode, the computer will display a 12, three consecutive times, by flashing the "CHECK ENGINE", "SERVICE ENGINE SOON" or "MALFUNCTION INDICATOR LAMP" or light. A 12 consists of one flash, a short pause, then two flashes in rapid succession.

After 12 is displayed, any stored trouble s will be displayed by flashing the "CHECK ENGINE", "SERVICE ENGINE SOON" or "MALFUNCTION INDICATOR LAMP" light. All s are displayed 3 times each then a 12 will repeat. In the diagnostic mode, the computer will also energize all computer controlled relays and solenoids.


http://www.2carpros.com/forum/automotive_pictures/188069_buickdtcconnection_3.gif



Also does your vehicle have a security system?

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Wednesday, April 29th, 2009 AT 6:56 PM

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