Agree. Not saying I dont look at them but let's be honest. We dont look at them constantly.In the case of the ZD326, the ECM appears to be more likely to fail. It also costs a lot and does things a few simple components could do better.
If you wait for that horn and it doesn't come on, you will be wishing you paid more attention to the gauge. OP's ECM let him down, and his gauge saved him.