I just finished the Denso Nav conversion on my '99 STS. Made the harness with AUX A/V inputs, reset TheftLock by pulling battery and re-loading firmware (thanks to N*Caddy for helping with that). Now I have a few issues, some bigger than others.
-DVD/CD player only works when cold. It was -8 F (Yep, it's Minnesota) tonight, and I was able to play a DVD for about 5 minutes before it went black. At that point it would not recognize any DVD. It would accept it, but the DVD source option will remained snowed out. If I insert a CD, it will recognize it as a CD and find the track info, however there is no audio when it plays. The time ticks up as normal, but no sound. I don't yet have the GPS antenna or the map DVD, but I'm afraid the radio won't be able to recognize the map DVD most of the time.
-Ground looping/Serial data line noise on Aux input. I've tried grounding the audio signal both to the ground wire to the radio and the actual radio chassis itself, both to no avail. I've used proper shielded twisted pair wire (Belden 9451). I think the radio itself is adding it.
-Loss of control sometimes. About one out of evey 6 times I start the car, the radio seems to not be talking to the Class 2 network. Sometimes it wont light up at all, as if it thinks the car is off, other times it will be stuck on the Cadillac splash screen and won't respod to any buttons or controls on the front panel. The steering wheel volume controld still works, however. If I shut off the car and wait for RAP to expire, and restart, it is usually fine.
Anybody seen these problems or have any ideas?