Yes, there are only two 1990 AG/AJ BCM's.

 

Yes, there are only two 1990 AG/AJ BCM's.

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NAJ, if you okay with it, i'm going to copy these pictures and put them in a solo thread in the FAQ section. Good stuff to have on hand!

 

Thanks for the verification!

Also, any simple way to tell them apart externally? Or just by pin location or internals?

 

You can post them, they came from the 1990 AG/AJ Body Diagnostics FSM.
The only things I do not post publicly are images/info from pay to use sites such as Alldata or Mitchell.

As far as telling them apart...
According to the listings in the Chrysler Parts Catalog only AJ used a Premium BCM, guessing AG did not come with EVIC or Electronic Cluster.

BCM Parts #'s...
1990 Base - 4503112 (AG/AJ)
1990 Premium - 4503020 (AJ Only)

1991 Base - 5266116 (AG/AJ)
1991 Premium - 5266117 (AJ Only)

The part #'s change again in 92, are they all the same with superseded #'s or different???

 

That would be bizarre, no? That no G-body came with the premium BCM? I would have guessed most of mine Were premium, simply because they had the power lock/ alarm security. Maybe more to this than meets the eye.

It could explain why they always worked though. Can't remember even swapping a good BCM in to replace a bad one and having any issues.

 

I guess the only way to tell if AG has/had a Premium BCM would be to see how many wires are in the "Natural Connector".

 

G bodies never received the premium BCM since the G bodies never got a digital dash.

 

Mind blown! G bodies 90-up didn't get digital dashes?

 

I may be "Old School" but I was always taught by Old Racers and Other Knowledgeably People that "Real" Performance Enthusiasts only use "Analog Gauges" since it is easier to watch and gather information on what is happening "now" by watching a needle than a bunch of numbers constantly changing.

I stick to that to this day.
Sure, a digital gauge/cluster may be "prettier" and more "impressive" to look at but gauges are there to impart information to the driver, not look pretty.