One cooling fan turns off when high speed turns on

I have checked all the relays and they are all good. What I have discovered is it appears I have no power coming out of the 30 slot for Fan Relay 2. Evidently that relay is bypassed entirely in low mode and both fans are run in a series just using Fan Relay 1 so that they only use 6 volts each. Fan Relay 2 is only used in parallel mode so both fans can get the full 12 volts for high. The 87 slot is grounded so I am now looking at the 30 slot on the fuse block for Fan Relay 2 to find out why it's not getting any power. Any advice still appreciated.

Thanks you so much for the diagrams, will be very helpful. Had to do a bit of research throughout the day so learned a few things along the way. :)

I see that diode is on the 87 side, not really sure how that would have an effect on the 30 slot not showing any voltage. I was checking directly into the slot with the relay removed. I tried and tried to find 12+V coming out of the 30 slot and got nothing. The #1 relay shows power at the 30 so I figure the #2 should act the same at all times with the car running. Everything else I tested was fine.

Now if I can get the fuse box up and out enough to investigate that thing. That did not happen so easily. I gave up on that and it got dark so seemed like a good time to walk away until morning. I will report back for sure. Thanks again for taking the time to help me out.

I do have a question. Do you have any suggestions on where to start if you had narrowed an issue down to the point I am at currently? (Trying to find out why I have no power at the 30 (power side) of the fuse block for the #2 relay?) I tried to see into it to see if the contact was gone but cant tell.

It ended up being the J Fuse to Fan 2 (#18). I got a little caught up in the way the system works and overlooked the simplest of things. Thank you again for your help.