Chevrolet Repair Questions? Ask a Chevy Mechanic for Answers ASAP
Where is the VCM located in the van?
How would the scan tool trouble shoot the cause if this problem?
If you had a scan tool and say it was acting up, what would the data point you too?
Where could I get a scan tool? Do you think Auto zone or Advance auto would carry one - even as a rental or something?
I know the altenator is good because I had it tested at Autozone. So, the alternator is not the cause. I had the alternator replaced with another one just as a precaution, and it was still doing it.
So what would that tell you based on your different proposed scenarios if we rule out the alternator?
As it relates to the location of the VCM, I know the PCM on my van is next to the battery within the engine compartment. ( bottom left side of the battery (looking into the engine compartment). We are not confusing the PCM and the VCM are we?
I did inspect the PLIS connector and the brown wire at the alternator, it looked fine to me. Since I initially replaced the alternator about 6 months ago and the this issue has started slowly and now ramping up, I could have a partial broken wire at the PLIS connector. That is the only thing that would see some fatigue and stress over time.
Anyway to trick out the PCM/VCM to think the alternator is OK? If I disconnected the connector from the alternator, could I connect the brown wire to gnd or to 12V to trick the PCM/VCM??
I want to rule out the PCM/VCM as my last possible cause of the problem.
Based on your experience, how would you check that the brown wire/connector was good?
OK, last question and we can go to bed and you can get paid... I have looked at my PCM/VCM. There are four big connectors/wire harnesses. Two on the top and two on the bottom.
Do you know which one contains the battery charging (brown wire)?
I think there is more than one brown wire in that big clump of connectors..
There is a zoo of wires. I will tell you the wire and connector you need. Of the 4 connectors, you need C3, which is clear. This is the colour of the connector portion that goes into the VCM, and if I remember, the colours are marked by position on the case of the VCM to aid in ID and installation. The terminal you need is #5. Here is a picture of the connector. It is looking into the VCM side of the connector.
Please ask if you need more assistance.
I checked the connectors. They are marked red, black, blue and white. Which one do you think it is?