My engine cut out yesterday while driving and I was lucky enough to stop in a parking lot where I could leave the car overnite. I researched the threads and need some help in testing the fuel pump relay which is a KAE brand. I read that 87 and 30 are the relayed points? What does that mean and how do I test this continuity? Any help would be appreciated

from what i have seen kae brand is crap. i usually either measure fuel pump wave form or amp draw

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1967 250 S
1967 280SE
1968 250S
1971 280 SE
1973 220
1974 280 S
1975 450 SEL
1976 220 D
1979 300SD
1983 300 SD
1985 230 TE euro
1986 280SL
1986 500 SEL euro
1986 190E 2.3
1990 300 SE
2003 C230 K
2004 C230 K
1987 560SEL
1987 300SDL now in canada
2005 C230
1998 C43 AMG Sold to DON
1993 190E 2.6
300TD Former daily driver Totaled
current:
R320 CDI
Ram 2500 Cummins