Gilly, below please find the results of the ETM test:

true - socket 6 Right turn signal input from signal switch (should be 12V with key on and signal in right turn position
true - socket 7 power from fuse 9
false - socket 9 Hazard flasher control lamp signal (output) 12V with exterior lamps "on"
true - socket 10 hazard flasher signal input (with hazard switch "on" 12V
true - socket 12 left turn signal input (see socket 6 above)
false - socket 15 left turn signal output (self explanatory)
false - socket 19 right turn signal output " " " " "

Based on the fact that all inputs are true and all outputs are false, is it correct to say that the relay module is bad?

You mentioned that this module also controls the wiper motor (along with other things), but the wiper still runs with the relay module removed!

Also, please see my earlier post in this thread about the head gasket. Oh fun...!

Thanks,

__________________
-Wayne

1994 E320 Coupe (120k)
1990 300SL (BBS,RENNtech adds)
1988 260E Sedan (180k)