Ignition Toggle Switches with AAW Harness

[JSmall]

I would like to verify my diagram with the experts I took the diagram that Viperwolf created and modified it for my needs. Does this look accurate? Does anything stand out that should be resolved before I start?

I want to use a DPDT toggle switch like Phil shows in his diagram so I have ACC (up), OFF (middle), Run (bottom), and then a momentary toggle for START.

I believe I would need to run a relay for the ACC and IGN circuits the way the AAW harness is configured. I am including a small section of the AAW diagram that shows the ignition switch wiring and a link to the the full diagram if it's needed.

Ignition Toggle Diagram

AAW Ignition Diagram

AAW Wiring Diagram
https://www.americanautowire.com/media/productattachments/files/downloads/92968422 510006 IN 4.0.pdf

 

[JSmall]

**Edit**

Wrong diagram

 

[JSmall]

With help from Broncobowsher, I believe I have the diagram figured out. I did not understand how a DPDT switch worked, so that was adding to my confusion.

I believe this is correct -

Two more questions, though. I have 70A relays in my diagram for the ACC and IGN circuits. Is that just right, overkill, or not enough?

Is it a concern that the ACC circuit will be energized while cranking? I believe the stock switch isolated the ACC circuit while cranking. If so, is that needed?

 

[Viperwolf1]

That will work. Size of relays depends on the load you intend to place on them. Any high amp fans going to be used? What about ignition system? Alternator wiring will be a little different unless you intend to use a delco alternator.

Sorry I couldn't get back to you sooner. I was either getting prepped for SCW or fixing things there.

 

[JSmall]

That will work. Size of relays depends on the load you intend to place on them. Any high amp fans going to be used? What about ignition system? Alternator wiring will be a little different unless you intend to use a delco alternator.

Sorry I couldn't get back to you sooner. I was either getting prepped for SCW or fixing things there.

All good and I totally understand. Hopefully, you had a great time

I am using a Volvo fan and relay pack wired like this.

I am running Explorer EFI and the relays are triggered with an Ignition+ circuit. Blue wire to pin 85 in this diagram

My alternator is wired into the same relay panel. Garry said it wasn't needed, but I had an open relay in my Bussman panel so I wired it in that way.

See any issues?

 

[DirtDonk]

Is the relay in the exciter circuit? Green w/red on a stock or Painless harness.
Are you using a battery charge indicator lamp?
While some modern vehicles do use a relay on that circuit for some reason, it does add another potential failure point down the road. If the relay fails then you don't have a working alternator. A lamp would be a quick way of being notified of a failure, while a volt-meter will work also, but needs you to be looking at it and noting that the voltage is back down to 12v or less.

Paul

 

[DirtDonk]

To answer my own question (with another possible question!) maybe the newer vehicles that do use relays are switching the alternator on and off from the computer. If that's the case then a relay reduces the load on the circuit.

Paul

 

[JSmall]

Is the relay in the exciter circuit? Green w/red on a stock or Painless harness.
Are you using a battery charge indicator lamp?
While some modern vehicles do use a relay on that circuit for some reason, it does add another potential failure point down the road. If the relay fails then you don't have a working alternator. A lamp would be a quick way of being notified of a failure, while a volt-meter will work also, but needs you to be looking at it and noting that the voltage is back down to 12v or less.

Paul

To answer my own question (with another possible question!) maybe the newer vehicles that do use relays are switching the alternator on and off from the computer. If that's the case then a relay reduces the load on the circuit.

Paul

-All six relays are triggered by the green/red from the ignition switch.
-No indicator lamp.

Here is an exploded view of the alternator circuit in my wiring diagram.

Not sure if this is the best way of doing it, but it has been working great the last year that I have been running the wiring this way.

The ignition toggle diagram was my concern when starting this thread. I believe I have that worked out, but now you have me questioning my alt wiring ;D

 

[DirtDonk]

If it's working, don't change it yet!
If the relay ever fails, you either can swap a less important one into it's position temporarily, or jumper #30 or #85 to #87 to get you home. And then re-think using a relay.
Or not...;D

Paul

 

[JSmall]

If it's working, don't change it yet!
If the relay ever fails, you either can swap a less important one into it's position temporarily, or jumper #30 or #85 to #87 to get you home. And then re-think using a relay.
Or not...;D

Paul

Thanks, Paul. I always carry spare fuses and relays