86 190e Power Window Circuit

[190 Owner]

Unexpectedly acquired an 86 190e about a week ago. Trying to troubleshoot the power window circuit which controls the driver front and pass rear windows.

So far:

Fuse is good
Switches swapped over and work in the opposite circuit

Where to next?
I've found a thread suggesting the relay behind the cluster, but this problem pertains to just the driver window circuit (#7 fuse I think).
Wouldn't I lose all 4 windows if the relay was bad?

Any help appreciated.
Thanks-

[MTI]

There are two fuses than control the power windows. The windows are fused in pairs, ie. Front Left & Rear Right (Fuse #7), Front Right & Rear Left (Fuse #8). So, if there's a fuse fault, you lose two windows diagonally.

The power windows are also wired to a relay in the fuse box, on the far left side of the box, in the row of relays between the fuses and the large multifunction relay.

[190 Owner]

I was told there is a relay behind the speedo cluster that may be at fault too?

I was getting a clicking noise down to the motor in the door, but no action.

I took out the window motor and bench tested. Motor would not budge with direct connect to 12V battery. Switched wires with same results.

Hope I'm on the right path. I scored a used regulator assy on ebay today.
I'm thinking this might be 2 dead window motors rather than a bad fuse or relay.

Will install the driver door motor when it arrives and see if it has any effect on the pass rear door.