Aftermarket part rant

heres one i dealt with today
ive been adding some lights to my plow truck, so im running wires

fused 10A into a switch block, hot from the switches to a relay

the relays i bought came prewired with about 10 inch leads on it
there are 5 poles on each relay,
30 positive from battery
85 ground
86 trigger wire from switch
87 out to accesory, normally open
87A out to accesory, normally closed

now, im not brilliant at wiring, but i know some basics, red is positive so that one goes on 30, black is ground so 85, blue is usually trigger (86) that must mean white and yellow are on 87 and 87A, right ?


wrong, it comes prewired like this

30 black
85 white
86 yellow
87 red
87A blue