Located where the fuses are mid console
it's in the back left and it's a round circular red relay
It was a bad relay.

I did that and nothing looked cracked. There was a bit of oxidation on the three leads for the three lights. Burnished it a bit and sprayed wire dryer over the entire relay. Put the cover back on and BINGO!!!! BINGO!!!! BINGO!! three brake lights. Thanks for your relay.
Bill

Been pulling my hair out on this one...
Checked the bulb and connection by putting voltage directly to light and it works.
I am suspecting the bulb failure relay but it is an expensive item.
Is there any test for that relay?
Again, thanks for the help...Bill

Possibly you have a faulty Overdrive relay? I had that same issue when I purchased a 1994 940.
It is located behind the fuses in the center dash area.
Hope that helps...

Thanks for the help...I am assuming the 3/9 is the brake light switch under the dash.
Where is the c1 connection, also is the 7/75 the bulb failure relay?

Thanks again for your help...Bill

Hello, I checked all three brake light bulbs ok/switch tests ok got a new switch anyway/power at switch ok no brake light power at lights. Is there a fuseable link in between brake light switch and the brake lights? All three bulbs test ok all three no power. OK looking thru the forum, I checked out...