Hi from Indiana and a new?? purchase with a few issues I think

[Scubadoguk]

Hi as promised lots of questions no idea really where to start, 1st The service engine light is on, the autozone guy plugged in and found a ecm wiring code he said that could be well he had no clue but you get what you pay for I guess anyone have any ideas where to check or come across this issue?
2nd. Today the abs and brake lights came on, now Christmas is coming and the dash is looking festive with all these lights and colors on but I am getting concerned any ideas what could cause this , there will be other issues I am sure but these two are the ones that are front and center, the Vehicle a 2001 Denali Yukon 6 litre. 230000 miles.
Any suggestions would be great, Thanks

 

[Scubadoguk]

well what a dumb ass I am Mods please could you move this to the proper area sorry guys

 

[about20ninj45]

well what a dumb ass I am Mods please could you move this to the proper area sorry guys

either you have short in the data bus, or you have a battery thats going bad. Id replace battery first and see where that gets you.

 

[Scubadoguk]

The main battery ? sorry used to bikes and small cars, so lots of newbie questions and clarifications

 

[about20ninj45]

Yessir!

 

[Scubadoguk]

thanks will check it out this weekend

 

[#1taho]

I don't know of any scanner picking up a short in a wire or even a "Ecm wiring code" .
Before you get further into this, have a shop scan it and start over. The battery idea is a good one , that is very possible. You have alot of electronics in you truck, if the battery is weak all your electronics will not work properly. It's a long shot but get a test light and check fuses, It could help too.

 

[about20ninj45]

I don't know of any scanner picking up a short in a wire or even a "Ecm wiring code" .
Before you get further into this, have a shop scan it and start over. The battery idea is a good one , that is very possible. You have alot of electronics in you truck, if the battery is weak all your electronics will not work properly. It's a long shot but get a test light and check fuses, It could help too.

No but if there is a short, the ecu can potentially throw the wrong code

 

[#1taho]

No but if there is a short, the ecu can potentially throw the wrong code

True, I have seen that

 

[Scubadoguk]

So if it's a short is there a better test to try? is there a test even or is it replace the ecu. I suppose the only real way is to get in there

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