On Dec 8, 3:37*pm, Boris Mohar wrote:
Took apart a Volvo 850 fuel pump relay. *Cracks everywhere.

http://www.viatrack.ca/Misc/FP%20Relay/

Regards,

Boris Mohar

Got Knock? - see:
Viatrack Printed Circuit Designs (among other things)http://www.viatrack.ca

void _-void-_ in the obvious place

Possibly.
It could also be the plating on the leads reacting with the Pb free
solder and causing a boundry cracking. I have seen this type of
problem since the late '50s and usually with the cheaper solders like
50-50 but even on Tektronix and HP equipment where better quality was
the norm.

Neil S.