Barry, thank you again for your help! I have everything working now.
When I first hooked up the power to the new amplifier to test it, I just assumed the white lead was positive and the black lead was negative. That is incorrect on my coach and it did in fact blow fuse #7, just as you suspected, when I hooked up the power backwards. In my coach, the labeling for the fuses was also incorrect and the awning/antenna were listed at position #6 when the actual position was #7.
I must have been careless with my visual inspection of the fuses because I swear I pulled them all and they appeared intact. Adding to my confusion further, the black and white leads still showed voltage (2.7-3.4v as I indicated above) even though the fuse was blown. Even more confusing, the voltage was reversed - in other words, with the fuse blown, the white lead was positive and the black negative. Still not sure what caused the voltage readings and reversed polarity with the fuse blown.
After some troubleshooting and another blown fuse, I finally figured out that my only real problem was the polarity issue. Once I sorted that out, the install went well.
I now have a fully functioning amplifier and aiming assistant for my antenna. It would have been a simple install if I had only checked the polarity with a voltmeter before attaching the leads to the new amplifier.
Thanks again!
Bob
