After replacing bad battery, chimes and radio don't work and dash lights/gauges only come on occasionally during crank but if I press the trip reset or use a turn signal, the gauges will come to life as if the truck was just cranking.
There is absolutely nothing else wrong. Everything functions as it should. This should be a BCM issue right? But I tried a different BCM and it had the same issue. In fact, even before I did a relearn for the new BCM, the radio and chimes already didn't work.
Is there something before the BCM that could be affecting these other functions? I used a meter and there's constant power coming from the BCM to the radio, it's just not sending the signal to turn it on. Is the serial data bus separate from the BCM or is it all the same thing? I used an ACC wire to get the radio working but I'd still like to fix it properly.
At one point, I did a BCM reset by holding the battery terminals together and that caused the chimes to come back.. but when I went to crank the truck, it just clicked. Of course after another reset, no chimes but the truck fired right up. I've never been able to duplicate that since.. this is a devious gremlin.
There is absolutely nothing else wrong. Everything functions as it should. This should be a BCM issue right? But I tried a different BCM and it had the same issue. In fact, even before I did a relearn for the new BCM, the radio and chimes already didn't work.
Is there something before the BCM that could be affecting these other functions? I used a meter and there's constant power coming from the BCM to the radio, it's just not sending the signal to turn it on. Is the serial data bus separate from the BCM or is it all the same thing? I used an ACC wire to get the radio working but I'd still like to fix it properly.
At one point, I did a BCM reset by holding the battery terminals together and that caused the chimes to come back.. but when I went to crank the truck, it just clicked. Of course after another reset, no chimes but the truck fired right up. I've never been able to duplicate that since.. this is a devious gremlin.