DocHaley

I have a 2000 xj cherokee classic and the rear washer fluid is not coming out although it worked yesterday. Reservoir is full, front works, pump makes a sound that is same as front pump.
I'm taking them both out including the reservoir this coming weekend and putting in two new pumps 'just in case' and while doing this was going to trace down the tubing to the rear window wiper arm where fluid should be coming out.
Anyone ever trace this down before? Overhead? Under carpet? Under chassis?
Thanks, could not find this in a previous thread. My apologies if I have been redundant with a topic.
Doc