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I am trying to replace an original equipment analog dial radio in my 81
Imperial with a digital dial Chrysler radio of perhaps a little later
vintage.
The radio I am trying to install is an AM/FM/Cassette with the six small
pushbuttons to the left of the readout. It has the gray and black. 7
wire, 4 speaker system connectors on the back. I have carefully connected
the wires as correctly as I can. The four positive speaker wires
were connected to the appropriate speaker plug going to the rear amp.
The negative speaker wires were joined together and connected to the black wire
on the rear amp plug.
Now the problem. When I connected the radio to the '81 I got a
pulsing intermittent radio sound from the speakers. I cut the black wire
to the plug and the radio worked. However, it runs very hot.
After about 15 minutes of operation I saw smoke coming from the power transistor
area. You can see the digital readout dim slightly when heavy base
tones are played. The radio sounds great but I suspect life will be
short. Maybe an hour or so.
My suspicion is that with the black ground wire disconnected the power
transistors are running out of control and overheating. By connecting
a 10 ohm power resistor in the break in the black ground wire the base
tones are subdued but the radio still runs hot. By
now you electronic types will recognize that I have no idea what I am talking
about. But I do need help.
Has anyone made the conversion from the analog dial radio to a two plug,
four speaker, digital dial, successfully. If so what do you
suggest. I am tired of pulling the analog dial radio every six month for
the bi-annual volume control bath. Also the tape player has started to
eject while playing.
Thanks for your help.
Rolland
Westra
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