TD New Guy
Join Date: Apr 2019
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Re: Radio whine - key accessory and on ignition start.
Thanks for the info on the grounds to look for, I will go through some of the ones there I haven't touched yet and check continuity values on them all with my multimeter. I am familiar with the Alternator whine while running coming through the radio, but having it happen with the car in accessory has me scratching my head. The PS motor mount ground is particularly concerning, that motor mount could be cleaned better. I just did a head gasket and a pile of other work to it. Before I swapped in the replacement radio I tried a couple of Chrysler radios my dad has as a backup for his XJs, had a similar whine on accessory and ignition. Some history on the car. I bought it in Feb, the stock antenna was corroded/ loose and the factory radio wouldn't pick up any stations (not even a whine noise or static so I guessed it was dead). I didn't have a cassette to check the cassette player or I would have checked there as well. I replaced both items. The new radio is a re-manufactured Chrysler radio with a combo CD player and tape deck. The guy rebuilding it also put in a headphone jack input to use a phone/ Ipod headphone cable. The antenna is an aftermarket rubber one from advanced. After the whine goes away I can pick up some stations. I have been driving it around without the radio on, mostly because I did a lot of work to it and need to hear how things are behaving... but mainly I am concerned the issue may have claimed the last radio.
Recent work done:
Lower control arms, ball joints and bushings.
Wheel bearings x4.
Struts, springs, mounts, x4.
Master Cyl. lines, calipers, wheel cylinders, pads, rotors, and drums.
Head gasket and new top end gaskets.
Heater control valve
Distributor, dist pickup, rotor, cap, wires, plugs.
Rebuilt a lot of the vacuum lines that disintegrated during the head gasket.
Neg battery terminal and post to inner fender ground wire.