andersbenz,

First, see if you have voltage at #4 GP. If not, something in the GP relay circuit isn't working. If you have voltage at #4 GP, try the test below.

Make a short (~4 inch) jumper cable with Clips on each end. When the GP do not work (and are turned on), short each GP with the jumper until U find a bad one.

When I drove 190D/220D/240D cars I always carried the jumper described above in the car. It got me started a few times when a GP burned out.

You should use 12 gage wire and clips heavy enough to carry the GP current.

P E H