It's not in the fuse box behind the fuses.

It's in the cubby behind the battery. Remove the plastic shield to reveal the ABS controller, Klima relay, OVP relay, etc.

Sixto
87 300D

Thanks I found it. It tests good but there is something loose inside when I shake it. Could it still be bad? ABS light on and tach not working. Can it be opened up without damage to look inside?

Some folks redo the solders to get it working again so go ahead and open it. Something loose inside doesn't sound right.

Sixto
87 300D

It was just a plastic insulator that was loose. What pins can I jumper to bypass as a test to see if the tach works or ABS light goes out? I ran it without the relay installed and no change. From the date on it of 0493 I'm sure it's original and the car has over 300K but I want to make sure it's bad before replacing it.

The part number on it is 2015403845 and has 7 pins. Is the replacement now a 9 pin #2015403745? Are the ones made by URO for $24 any good?

I've had my share of fitment problems with Uro but an OVP is fairly generic and not mission critical, outside of needing the airbag , that I'd risk it.

Sixto
87 300D

I got it today and plugged it in, tach now works and the ABS light goes off. Best $29 I've spent in a while.