2004 Ford E350 6.8L 2WD Auto
I'm looking to access the c221 interior lamp relay. The owner's manual says it is located in the instrument panel relay module located behind the radio in the center of the instrument panel. However, I cannot locate it. Can anybody help me locate it? Thank you!

 

Can't locate C221, but I found the following so I didn't search C221 further. It's in Auxiliary Relay Box 2 so look at Column 4 Row C in the diagram below you can see it's very close to cigar lighter so just pry that panel out with panel tools to get to it. Why you need to get to the relay, any problem?

 

Yes. It's a followup to this post from May, which you also answered. Thanks!

https://www.fordforum.com/forum/showthread.php?t=49018&goto=newpost

 

Oh ok. One correction on one of my replies from other thread, I believe it's positive trigger (instead of negative) at the door ajar.
Additionally, do you have stock or aftermarket stereo? You might need to remove that first before prying that whole instrument panel out. And pry the section under cigar lighter first, then pry counterclockwise, then what's left is the connector for power plug and cigar lighter. Post followup to that thread if you need any help.