I guess the Navigation was direct wired and not switched, so the power draw was totally outside the Electronics of the H3; so I guess that is why there is no "rundown" protection. They did (supposedly) use the proper interfaces for the thing. The Hummer dealer says they should have installed with some type of power surge relay or had the unit use switched power.
<BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content"> Also, did you have the Monsoon radio? If so, did you have to replace speakers, amps, etc?
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I did have the Monsoon and I also added a Pioneer Airware XM2go unit, hardwired. Everything sounds good through the stock speakers/amp etc. nothing else replaced
The Hummer dealer was great though; no charge for the flatbed service or the troubleshooting of the issue. They even offered to talk to the Navigation Installation folks when I take it back there.