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He's right, some of these relay systems are a bit... Messed? I had to take two apart to make them work properly. You can use a small flat screwdriver to bend the tab that keeps the... Geez can't remember the name, but the little connectors in the relay wiring harness. Bend tab, pull out wire, put in correct slot.

30 is main fused battery positive in.

87 main battery positive out to device you want to power.

85 is ground

86 is what I like to call trigger. Trigger can be any positive voltage to trigger the relay to bridge the circuit between 30 and 87.

If you want to reverse the relay, 87a is always on, till triggered.
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