Help replacing an OLD isolator
So I am going to assume my isolator is broken (judging by how old it is) and NOT that it was wired wrong. Although it does seem to be wired differently than the instructions I see for new ones. Fo...
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I looked at Mex's linked relay on Amazon and when I did, noticed there are Three- and Four-Wire versions of these relays.
The one in OP's pic, and the one Chris linked, are Three-wire. Two big lugs for the current that's being switched by the relay, and then one small lug to energize the relay. In this case, from the RUN terminal of the Ignition Switch, or whatever it's linked to. The Relay's CASE must be Grounded to the Vehicle to work. With a Four-Wire, the second small lug goes to Ground also. Could be right to a mounting fastener for the Relay, or off to somewhere else on the vehicle.
The one in OP's pic, and the one Chris linked, are Three-wire. Two big lugs for the current that's being switched by the relay, and then one small lug to energize the relay. In this case, from the RUN terminal of the Ignition Switch, or whatever it's linked to. The Relay's CASE must be Grounded to the Vehicle to work. With a Four-Wire, the second small lug goes to Ground also. Could be right to a mounting fastener for the Relay, or off to somewhere else on the vehicle.
