Ford Truck Enthusiasts Forums - 1977 F100 AM radio wiring

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- 1973 - 1979 F-100 & Larger F-Series Trucks (https://www.ford-trucks.com/forums/forum38/)

- - 1977 F100 AM radio wiring (https://www.ford-trucks.com/forums/1542522-1977-f100-am-radio-wiring.html)

Jacob Bowman

06-02-2018 11:21 AM

1977 F100 AM radio wiring

https://cimg1.ibsrv.net/gimg/www.for...abdbf0df1.jpeg
https://cimg8.ibsrv.net/gimg/www.for...0a0c807ff.jpeg
https://cimg9.ibsrv.net/gimg/www.for...e59b18588.jpeg
https://cimg0.ibsrv.net/gimg/www.for...766a120fb.jpeg
Included with my truck was an AM radio (disconnected) C-D4TA-18806 With AA stamped in ink

see picture and please let me know what each wire does

also someone put a new in dash speaker in (has positive and negative wires ready to go... any different than stock?

scottscott

06-02-2018 02:04 PM

Blue with tracer is for the light.

Plug wires are most likely for the speaker.

Black A+ is most likely power.

Jacob Bowman

06-02-2018 02:44 PM

For two wires that go to speaker, does polarity matter?

Tedster9

06-02-2018 03:31 PM

Quote:

Originally Posted by Jacob Bowman

For two wires that go to speaker, does polarity matter?

Yes, it's also important that both speakers are wired correctly or they will be "out of phase" - canceling each other out to some degree. Both speakers Pos to pos and neg to neg.

Mech Anon

06-02-2018 04:49 PM

Quote:

Originally Posted by Tedster9 (Post 18015893)

Yes, it's also important that both speakers are wired correctly or they will be "out of phase" - canceling each other out to some degree. Both speakers Pos to pos and neg to neg.

Well, no and yes. It doesn't matter which way they're wired as long as they're the same as each other. So if it's a mono (not stereo) it doesn't matter at all.

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