Electrical Radio reception

Scott7512

Active Member
May 19, 2015
153
8
38
Branchland WV
Looking for some ideas where to go next. New radio and antenna cable. Stock length antenna.
I get good reception with the key in accessory position but when the key is in run position the reception drops to almost nothing. This is with the engine off.
I do have a msd ignition box.
Am I down to unhooking things till the problem goes away?
 
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