88' Suburban: Ignition Switch Problems & Location?

[JasonTL]

Hi All! Found this forum a few days ago and have already found some great threads and information. Hoping maybe you guys can help me with an electrical problem.

Car Info:
1988 GMC Suburban 207k Mi. 5.7L 350
Sat Dormant for a few years, I'm fixing it up and want to fully restore it.
Has a 6 year old battery that works well.
I should also note we have an identical Chevy Suburban that works fine(windows, heat, etc works). This has been useful for operational comparison.

And yes, I have checked the fuses first.

Here's the really quick back story(if you want I can post the 'Short' version which is longer than this):

Last week I wanted to fix my power windows(all 4 don't work). After some testing I soon found out I had no power to my Driver's Window motor(switch seems fine). A little further testing proved I had no power to my 3rd column on the fusebox, this controls Heater, A/C, and Power Windows(which explains why neither of those two work either).

Checked the connector on the engine-side of the fusebox and only had power on 2 of the terminals. Checked and tested some other things and then yesterday went under the car and checked the battery cable to the starter solenoid and found a fusible link connected to it. Cleaned off the eyelet on this link and then put it back together. The connector for the fusebox I previously mentioned now has power to all of the terminals it should.

So I rechecked my fusebox after reconnecting the connector and I still only have .01-.05v on the 3rd row. The working Chevy has .01-.05v one these fuses when the key is not in but when in Accessories or running they have full power. Mine doesn't get full power even when running. It still only gets .01-.05v.

I have checked all the basics, fuses, battery connections, wire, different connections. I've checked a bunch of stuff that I haven't listed. You can still suggest it and I'll say whether or not I checked it.

I'm thinking the problem is the ignition switch. I just don't know where it is located.
Reason I think it is this is because it seems like the power for the 3rd column runs through that switch and isn't getting turned on when the key is in Accessories.

Could anyone tell me where this switch is(or provide a pic?)? Or if you have an idea what the problem is please tell me.

Thanks in advance for help.