The diagrams and photos show how to wire up the fuel pump and oil-pressure switch to a commonly available, industry standard, ISO-type "1 Form C single pole/double throw" (SPDT) relay.

Testing relays and their circuits in vehicles doesn’t always require a trip to the bench. With a few simple tools and ...

Do you have any information, including a wiring diagram, that can help me wire my Lionel No. 450 Operating Signal Bridge using AC relays? Thanks! — Fred Richmond As Lionel operators certainly ...

30 (other red wire) needs constant 12-volt power from the battery. 86 (gray/white wire) goes to the ignition switch. 85 (black wire) connects to the temperature-controlled sending unit.