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1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks Discuss the Early Eighties Bullnose Ford Truck

Stereo wiring

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Old May 19, 2013 | 02:10 PM
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Thomas Dezall's Avatar
Thomas Dezall
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Stereo wiring

l am having trouble installing a Kenwood KDC-248U unit in my 1986 Class C ford motorhome....lt had an cassette ( auto-reverse)in it . The balance never was right in it since l got the unit. Anyway,l get a " protect" on the new Kenwood everytime l try to attach the speaker wires. Older FOrds usually had one ground , is that what could be causing my new deck to go into "protect"?
 
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Old May 19, 2013 | 05:03 PM
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Yes. Read the instructions with the new stereo, most of the high power ones cannot have a common ground on the speakers. You will probably need to just abandon the old speaker wiring and run new.

To get the higher power from a 12v supply, the newer radios "pull" on the negative speaker wire at the same time they "push" on the + speaker wire. That's a primitive way of describing it, but is basically how they work and why you can't use a common ground. We can cross our fingers and hope the new stereo did indeed "protect" itself and didn't burn anything up inside.
 
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