1976 280c no power to powerwindows
 

power windows are receiving no power at the fuse box. did clean terminals and replaced both 16 amp fuses . still no power? any ideas how to test fusebox . ground points locatations in powerwindow systems .

Fuse box? Are you referring to the separate fuse block located on the RH firewall? Unless the ignition is in the "run" position you won't have power to those terminals.

powerwindows no power
 

yes the fusebox on firewall ill go double check with key on

double checked even with key in pos 2 no power to powerwindow fuse box on pass firewall took out fuse box going to soak the screws in vinegar and clean brass with fine emery then dielectric grease brass end for the fuses

Anyone have a wiring diagram they can post?

And... Are there any other electrical items that are not working on this car?

76 280c wiring
 

yes I have Mercedes wiring diagram . 1975 to 1979 Mercedes electrical troubleshooting manual . aux fan fuse box mounted on left fender have 3 wires hanging off a broken fuse box f 20 off batt bus theres a 2.5 rd/b k wire going to fuse fuse box then theres a rd/ bu 2.5 wire leaving fuse box to 3 #30 on aux fan relay my aux fan doesn't work on my 76 280 c aux fuse box theres a red and a blu and a larger red attached to main fuse attached a test light says power even with key off in diagram manual I only see aux fan fuse box with only 2 wires wonder what yr vechile looks like with relay on lrft fender in engine compartment behind the main fuse panel see no main fuse panel in this manual if you need any diagrams ill post they are larger versions ill upload pics too

aux fan power windows

power windows and aux fan wiring
 

aux fan doesn't work and no power to windows . tried to pst picture wouldn't upload . ill explain . on left fender side . in engine compartment. behind main fuse box . theres this f20 fusebox . in diagram posted . says rd bk wire runs fr batt bus . into fuse box 20 . then theres another rd / bu wire that leads off fuse box to #30 aux fan relay . on my 76 280 c theres a red wire hot all times running fr main fusebox and this black wire and a blue wire coming from firewall where the vacuum lines run into a grommet noticed the blue wire runs under the rocker panel moulding need to remove the rear seats to locate not sure if the blue and black wires are correct in subsistute what the diagram says . since see no fuse panel the main one in this Mercedes electrical troubleshooting manual . figured maybe someone has a simuliar model and could write notes or send a picture . not easy reading some diagrams confused

You are not the only one who is "confused." Your writing "style" doesn't help those who might want to help you. Please remember, capitalization and punctuation are our friends.