Pin 9 is HOT all the time.
So I can't get power from there, 'cause the radio would run the battery down.
The I-buss does not control the radio it will operate on a bench with out it. It provides the speed signal to the radio despite what the big diagram says.
So that shouldn't be what's turning off my system after 2 sec.
How many/which connections (Power/ground wise) are needed to work on-the-bench?
Switched power is sent to the controller on pin 3 of its connector and comes back out as the RON signal (on pin 7 of the controller connector) that goes back to the instrument cluster and to pin 5 on the radio.
So PIN 3 of the connector under the control buttons has switched power. Key switched or logic switched?
What is the acronym RON (Radio ON?)
The picture of the controller is totally different than my '05. The "05" doesn't have an LCD display. It is incorporated into the dash display.
1) I should see 12v at PIN 9 of the radio at all times.
2) I should see 12v on PIN 3 of the controller connector only with the key on.
3) I should see 12v at PIN 7 of the controller AND PIN 5 of the radio, when I turn the radio on via controller "ON" button
If, while monitoring the voltages, one of them goes away after 2 seconds, It MIGHT isolate who is cutting power.
Feel free to PM me and give me a call if you have the time.