Would that happen to be this wire this is right under the coolant reservoir? I'm not quite sure if this is what you mean, but looks like this is what you're talking about. There's a power steering fluid leak (only a slight one) so it's covered in gunk and that could definitely be a bad connection. The other ones that connect up to the front engine timing cover were pretty oxidized so I wire brushed those. Thanks for the tips! Gonna try that today as well.