A friend with a 1991 CRX has had a hard start whenever the car set
in direct sunlight. He bought a new relay from a Honda dealership
and the car would not start the next day. I pulled the realy, replaced
it with a old one that I resoldered. When I checked his new relay,
the solder joints looked as bad as the one in our God daughter's
1990 Civic. I resoldered both of his units, the old one, and his
brand new one. I would love to take a look at all the dealership's
relays in stocks. I am betting that they are all less then perfect.
I have seen 5 realys in the last few weeks and they all have the same
soldering defects. I am starting to wonder if the sub-contractor
used low grade solder. I have worked in the electronic business
for the last 30 years. I have worked on too many eletric devices
to even list in my mind, and I have never seen a pattern of failure
like this! So yournew realy may well have been defective when you
bought it. If you saved the old one, get someone to remove the old
solder and resolder the unit.
Terry