Battery type

[KnoxMojo]

Schwan, that is awesome!! New goal for a rainy day. How difficult was it to do?

MLA, I played with it yesterday, and keep in mind, this pertains to the Supra system. Without my Bluetooth connected and stereo on, no music playing, no pop on crank up. Bluetooth on and music going, pops on start up. Shut boat down, turn on music and then key on, no pop and music plays. Did not matter if boat was in 1 or 2 or both. One thing I didn't try was to pause the music and then crank it up, knew I forgot something.

This has been a very informative thread for me and hopefully others.

[MLA]

Good info, knox. IIRC, on the Surpra, the BT is an external component, so that also factors in as its another piece in the signal path, AND it likely has its own power supply. It also has its own shut down and boot up timing.

Anyone getting the pop in other modes besides BT?

[KnoxMojo]

We had an Iphone connected via usb the other day to charge and the music was playing through it in aux, and it did pop on crank up.

[KnoxMojo]

MLA, if you give me some direction, I am pretty handy with a DMM from my Radar repair days. If I need an oscope or spec-an, well, those are skills that have long since left me, lol

[schwan]

Knox, not hard if you have 12v knowledge and you know what wires go where. It's so worth it, you never have to worry about what battery you're switched to.

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[larry_arizona]

My Supra is always on Bluetooth and pops on start up.

I will try with Bluetooth off.

Isn’t the Gussi steering wheel always using Bluetooth?


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[MLA]

We had an Iphone connected via usb the other day to charge and the music was playing through it in aux, and it did pop on crank up.

Ok, this steers the focus back to the ICE, rather then a peripheral like the BT.

You will likely need a meter with a MIN/MAX feature so you can capture a voltage drop that may not otherwise, make it to the meter's display, given the short time span thats needed to created the event.

4 main circuits need to be monitored:

ICE constant B+
ICE switched IGN
ICE amp turn-out
AMP voltage

Now, the ICE may not have both a constant and a switch IGN. Many new units now use EEPROM memory and have no need for a constant, so they just use a switch IGN. Ive got the ICE PDF tucked somewhere, just need to dig it up.