So I finally figured out what the issue is with my ACR. To restate the problem, the ACR will not combine with the engine running as indicated by a blinking green light. I tracked the problem down to the Starter Isolation circuit. The ACR has an optional SI wire that should be connected to the ignition switch, specifically, to a post on the switch that shows zero volts when in the on position and 12 volts when the engine is being started. I thought that was the post on the ignition switch that the yellow wire with the red stripe is connected to so this is where I connected my SI wire. The SI feature momentarily disconnects the batteries (when they are in a combined state) when the engine is started so that the stereo equipment is not affected by the surge in current required to start the engine.

What I found is that the post on the ignition switch where I had the SI wire connected does indeed show zero volts when in the on position and 12V when in the "engine start" position. HOWEVER, I discovered that as soon as the engine is put into gear, the post shows 12V. So that is why it was combining when the engine was running but the throttle is in the neutral position but would not combine when I was underway. I checked the other two posts on the ignition switch and both show 12V when the key is in the on position.

So I concluded that at least on my boat, there is no way to use the SI feature so the SI wire should not be connected.

Razz/Mandley,

Please check your ACR's since I think you wired your SI the same way I did and let me know if the green LED is blinking when your engine is running and the transmission is in gear.

Thanks,

Al