Starter relay wiring

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yellow rose

yellow rose

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I built an engine run in stand, and used a Chrysler starter relay.

Looking at the relay, I can't for the life of me remember what the "I" spade is for. Do I need to even use the thing?

I know I have to ground one with the "G" spade and the other with the "S" goes to the starter.

So do I need to use the I spade or can I just forget it?

Thanks
 
The I is the start. That is start signal coming from your key or push button. If you have a real heavy duty push button, you don't need the relay

G is ground through the neutral switch, or clutch switch.

The earlier stick cars (before 70) only had three terminals......I for start, the big stud for battery, the square one for solenoid, and the "case ground."
 
67Dart273 said:
The I is the start. That is start signal coming from your key or push button. If you have a real heavy duty push button, you don't need the relay

G is ground through the neutral switch, or clutch switch.

The earlier stick cars (before 70) only had three terminals......I for start, the big stud for battery, the square one for solenoid, and the "case ground."
Click to expand...


So if I am just using 12 volts to a switch and out of that switch to the ignition, I don't need to use the I spade correct?

Or do I need to put a wire from the I spade to the out side of the ignition switch? If I do that, I will always have 12 volts at the ignition and not be able to turn it off.

I'm still cornfused.
 
I don't understand you last post. You may be confusing "ignition run" and "start"

The ONLY thing the I terminal on the start relay does, is this:

The two small spades are the relay COIL. So the coil must be energized to operate the relay, which fires the starter

None of this has anything to do with "ignition" or running the engine.

The G terminal gets a ground jumper. (Replaces neutral safety)

The I terminal of the relay must receive 12V to operate the starter.

Whatever you are using for an ignition switch has must have a "start" position and the related "S" contact. That is what feeds to the "I" terminal.

WAIT A MINUTE!!!!!! LOL

Do you have the older 4 terminal relay? Like this:

starterrelay.jpg


Or are you using the newer "Jeep" relay, also used on some Mopars?

like this:

109944.jpg
 
I have the older one.

So if I just put 12 volts to the I spade and call it good?

Man, I hate all things electrical.
 
12 V to one spade, ground on the other will cause the starter to actuate, yes
 
For others, on an engine stand probably easier to use a standard automotive 40 A relay. Two terminals for coil (86 to 85, or vice-versa check polarity), two terminals for the "switch" (30 to 87). Chrysler started using those when they changed to the underhood fuse/relay box (ex. my 1996 Voyager). For neutral-safety, they just route coil- to the NSS.
 
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