Nav install help, 4x4 connector removal?

[HumbleAg]

F5, another question for you if you have a moment.

I noticed last night that the Neucleus adapter does not have the bus pass though like peripheral does (purple wires from 24 pin to 12 pin connectors).

I may be grasping, but I'm wondering if this is causing either the onstar or XM to power cycle after the chimes stop, causing my "pop".

Do you see any harm in jumpering the wires like the peripheral tech note describes? (the neucleus has nothing attached to the 12-pin connector at that point)

I asked Neucleus tech support about this, but they haven't come back with a reply. If I can't figure it out, I'll just order the peripheral units (Cardomain has them on sale now anyway).

Thanks!

[f5fstop]

Not sure about the pop. I tend to say no, this won't be the problem; however, there might be some reason the Onstar is popping due to no serial data input from the BCM.

Two class two wires come in on the brown (large) connector, terminals A1 and A2. One class two wire comes in on Pin G of the smaller black.
The wire on Pin A2 is the serial data wire to the radio from the BCM, and is used to communicate between the BCM and the radio, and also from the Onstar and XM modules. The wire on Pin A1 is the pass through wire from the radio to the Onstar module; the wire on Pin G is the pass through wire from the radio to the XM module.

So, Peripheral, before they made the change (which was to jumper the three wires together on their side of the adapter connector), required you to take the three wires going into the back of the two connectors, and splice them together. This way, the BCM still sees the three modules.

If you use the XM antenna for the new Pioneer XM module, a code will be set in the BCM that states the XM has lost antenna signal (something to that affect). It will not turn on the light, but if your vehicle is worked on by a tech, and he scans for codes, these codes will appear.

In addition, under some circumstances with some adapters; not sure which ones. To reprogram the BCM, if ever necessary, the radio fuse has to be pulled. Some of these adapters send out a radio message every so often, to let the BCM know the radio is there; however, some of these adapters constantly send out the signal, and confuses the BCM. I was able to load the new BCM calibration into my H3 without any problem. But I have heard, in some cases, the radio fuse might have to be pulled to program the BCM.

[HumbleAg]

Ok, now I'm officially in over my head. I understand your explanation, but the wire that isn't there is the one on Pin G, so if that is the issue, the XM would likely be causing the pop. The onstar should still be ok (but I didn't test it when I had everything hooked up). It does make sense to me that the XM could be popping because a signal isn't getting transmitted through.

BTW, I didn't get an XM adapter (I don't subscribe now) and I also haven't renewed Onstar (although I know the system should still work).

Easy enough to test, I'll jumper the wires like Peripheral does and see what happens.

I've read some other forums where people say the Metra adapter does the same thing, so I'm thinking maybe there is just an issue with the adapter design. Nothing yet from the ebay guy I bought the adapter from (no big surprise there).

Any issues with the Peripheral adapters? Can you adjust the chime volume, or is the volume ok by default?

Thanks again for the help.