sdryluth
Newbie
Hey folks, I've got a weird one.
My new to me 1990 K1500 has a check engine light on. Sometimes it turns off for a second or two while i'm driving, but it always comes back on.
The problem is, I can't seem to get the codes out. Shorting pins A and B on the diag connector together does nothing. The Check Engine Light stays on solid the whole time whether the pins are shorted or not. I checked and Pin B has 5 volts power with key on, and Pin A has 0 ohms to ground, which I think is normal?
Any idea why it would be doing this?
My new to me 1990 K1500 has a check engine light on. Sometimes it turns off for a second or two while i'm driving, but it always comes back on.
The problem is, I can't seem to get the codes out. Shorting pins A and B on the diag connector together does nothing. The Check Engine Light stays on solid the whole time whether the pins are shorted or not. I checked and Pin B has 5 volts power with key on, and Pin A has 0 ohms to ground, which I think is normal?
Any idea why it would be doing this?