Here is how to figure out just which ternimal is which:Originally Posted by capyjack
The solenoid relay is a four terminal device. The relay coil is connected between the throttle (TH) and ignition (IGN) terminals, which are interchangeable.
The other two terminals are the solenoid (SOL) and battery (BAT) which are also interchangeable.
Take your meter set up to measure continuity and find the two terminals that are connected together through some relatively low resistance. These are the TH and IGN terminals – they are interchangeable, just two ends of a coil of wire in the relay.
Once you find these two terminals, the other two are the SOL and BAT terminals. With your meter, verify that there is no continuity between those two terminals.
Connecting the BAT terminal should not do anything to energize the relay. It should only energize with the IGN and TH terminals connected. There may be a wiring harness issue somewhere.
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