Unfortunately wrecks can’t be probed.
However, you can find plenty of T2 and faction drones with combat probes. I like to hit d-scan as I’m warping through low sec. If I see faction drones pop up, then I’m looting them. My best find was finding four ‘augmented’ hammerheads. I think the total was over 100m. Not bad man.
You can also find mobile tractor units with combat probes. Frequently, they’ll be abandoned, or the owner may be busy somewhere else. You can blap them for their loot, although it’ll give you “suspect” status. But since you’re in low sec and below, it won’t matter. My best find from last month dropped over 350m ISK in loot.