FRACK-Dead ECM ??

[shelbyt.67]

Hey all,
I got a problem. Just installed a new oil press sending unit, To get to it I removed my dizzy.( needed a new gasket anyway). I replace the dizzy, and set timing. Had a problem at first cause I forgot to disconnect the EST wire. So I disconnect est, start er up, reset timing. Shut er down, insert jumper, reset iac, no codes, unplug jumper, turn the key to start and all I get is a loud click and all lighting goes out. Deader n ****. A couple of min goes by, lights come back on. Jumper back in, turn key, read codes, I get a 42, bad ICM or bad ECM. I checked the fuse in the cab, its good, so I,m thinkin ECM cause a dead ICM would'nt kill the lights like that would it? IDK??? Frackity frackin frack!! All I wanted to do was change my freakin oil sender!

 

[outalne94z71]

lights dead like that is a battery connection, check all battery connections and grounds

 

[1997chevydriver]

bad ecm wont kill lights either. Check battery connections.

 

[1997chevydriver]

Damn beat me too it

 

[shelbyt.67]

I thought about the Battery, It is old. But what about the code and the lights comin back on after a delay? Would a bad batt screw with the ICM enough to throw that code?

 

[outalne94z71]

I thought about the Battery, It is old. But what about the code and the lights comin back on after a delay? Would a bad batt screw with the ICM enough to throw that code?

i dont know where you got your code listing from but here is the right code 42

42 electronic spark timing (EST) circuit grounded

the loud click you heard was the battery loosing connection

 

[shelbyt.67]

The Haynes manual. Thx for the info. Where did u get your code discriptions?

 

[shelbyt.67]

OK, I looked up codes online found what you toll me. Gonna charge battry overnite and check connections in the morn. Thx again.

 

[shelbyt.67]

Found the problem. Bad connection at the pos terminal on the batt.



major over-reaction. Musta had too much coffee.

 

[///RAGMC]

Found the problem. Bad connection at the pos terminal on the batt.



major over-reaction. Musta had too much coffee.

Ive learned always start with the basics 9 times out of 10 its something simple.