Engin light

CMS

MEMBER
GMC

I have a 1991 chevy blazer 4 wheel drive 128000 miles my check engine light keeps coming on and off I cant afford a scanning kit and auto stores cant test it because it a 91 please help as soon as possible

Monday, February 20th, 2006 AT 12:14 PM

1 Reply

MVANNESSJR

MECHANIC
223 POSTS

Well, they don't need to scan it, but you can get the local auto shop to read the codes. If you want to do it yourself use the old paper clip method.

Jumper the A and B pins of the 12 pin ALDL OBD1 connector with a paper clip located under the driver stearing column. While the car is off, sitting still, turn the ignition key forward while this jumper is in place. Do not start the car. The Service Engine Soon ( SES ) light will flash in a repeating sequence, telling which trouble codes have been set in the ECM.