'89 GL wagon interval wiper controller location

[TahoeFerrari]

The interval wiper funtion in my '89 GL wagon has quit working. I thought it would be an easy job to replace it, but surprize, it's not where I thought it would be!

 

The interval wiper controller in my '87 3-door is easy to get to - it's fastened to the back of the kick panel just to the right of the fuse block. Not so in my '89 wagon. I checked a friends '88 wagon and I can hear the intermittant wiper relay somewhere behind/above the ECU (or below/behind the instrument cluster), but I can't see it. I'm assuming it's in the same location in my '89 wagon.

 

What is the best way to get to it?

 

a) From below by removing ECU and other stuff,

From above by removing the instrument cluster, or (I hope)

c) Some magic trick that doesn't require dismantling half the car?

[Cougar]

I'm not sure myself where this is but I think it is up in the area you mention. If you don't get an answer by Friday I will be back home and can check my manual then.