ACS Starter Relay - How to Wire?

[HFS]

I just got the starter relay I ordered from AC Spruce - the black one with two big posts and two small posts. I expected some sort of wiring diagram - not!

Can anyone help me with what goes where, before I fry something by trial and error?

Thanks in advance for your response.

HFS

[Mike S]

Did you look closely at the relay, see if there are any markings on the shell near each of the terminals??

If it is the one I think it is, you may find one little stud has a S and the other has an I.

Ground the S-----ignore the I

One big stud should have a B--------it will be the one closest to the little one marked S. Battery goes to it.

You can also test things out with an ohm meter.

Got a photo of the relay ----or part number--- might make it simpler to diagnose.

Maybe it is this one??



If so, here is the info from the Spruce site.

http://www.aircraft-spruce.com/catal...-03162spec.pdf

[Jesse]

Actually, this is in intermittent duty solenoid. You give 12V to the S terminal to crank the starter, not ground. The master solenoid gets ground to activate.

[Mich48041]

Add an arc suppression diode across the coil to protect the start switch. The arrow on the diode should point towards positive.