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The antenna could be at fault causing feedback into the radio. check with a good SWR meter to confirm this. Also check the power lead to the radio, try to connect directly to the battery.....
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the whining noise is your engines alternator bearings
they are worn out , the alternator is close to failure
it is barely producing any voltage
( the battery light in the dash only indicates that the alternator is no longer generating any amperage )
A whinning noise while turning is an indication of a worn bearing. The extra pressure put against the bearing/race during the turn and the closing of a gap creates this noise.I would chech the axle bearings on the side of the truck on the outside the curve when you hear it. What I'm saying is if you hear it when you turn left....check the right side bearing
are you sure the noise is comming from pump and not the belt tension pulley right next to it ?
I use a wiffle ball bat with both end caps cut off (hollow tube) held to my ear to help localize noises on running engines I have even found tricky intake vac leaks with that trick
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