Fuel Relay

Hello,

I read that some people used to make a bridge when the fuel relay is "dead" between some connection.

They told about pin #7 and #8 (hope) but I had a look on my relay and of course these number are not there !!!!

I would like to know what is behind these numbers/letters I found on the back of my relay:

50/31
TD/15
30/87
87k/87h
87v
TF

where is the 12v input and where are the relay contact and . . . .

Just to be abble to make a bridge if I need to do it. (knowing that the best way is to have one spare relay)

regards,