check engine light on steady-no codes

[johnc]

I have an '84 s10 2.8 w/carb and auto . I put an engine in it, and the "check engine" light is staying on. I cannot get any codes either. I think I got all the wires connected. What are the chances it is the computer? I did cook the insulation on the 02 sensor wire when it was too close to the exh. manifold, but I still have continuity on it.

[TheProfessor]

does your O2 sensor have bar wires now???

[johnc]

The wire has bare spots. The hardwired connection is kinda funky too. I did run it with the wire disconnected, and the light stayed on.

[TheProfessor]

maybe you should try a new sensor

[johnc]

New sensor is in. The light is still on. I have continutity all the way to the computer connection. On my '86 (tbi 2.8 )I would hear a definite "click" when I was reading codes. Is there some sort of module that could be sticking and keeping the light on?

[TheProfessor]

the click might be the abs

[johnc]

FOUND IT

I found the problem. There is a seperate in-line fuse in the wiring harness inside the engine compartment. It is on the passenger side and the lead runs from that firewall mounted block with red wires that feeds the underhood light. I know I had power to one of the computer pins on my first check. The computer harness must have more that one hot lead. I get codes and the light goes out now.

[TheProfessor]

for real
never heard of that ill have to remember it