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On most relays there are 4 posts. Some have 5 with the 5th being right in the middle.
Here a pinout:
85 gnd
86 12from switched source
87 12 main power in from battery
30 to lights
87A is the pin in the middle if you have one. It is the normally closed posistion on the relay and will have 12 power coming out when pin 87 has 12v, and no power is present at pin 86.
It will turn off when power is applied to pin 86. There are many ways to wire a relay to do many different things, but this is a standard pinout to activate high power devices, lights, etc., from a low power source.
__________________
Gary Waggoner
Golden, Co
1989 FJ62 SOA, 502 Mercruiser, ARBs Sold
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