Thanks Dennis,

I pulled the amp to check for power / grounds and at Pin 5 of the Amp A connector I have 6.2 volts and I have good grounds on Pins 4 & 11, so I'm pretty sure the amp is NG. If I replace it with a high quality aftermarket unit how do you deal with the connectors on Amp B Pin 2 for Power Top Status Signal and Pin 3 for Wheel Speed Sensor Output??

Thanks!