Need some Jvc stereo info

[Vettebrat]

I recently purchased a used JVC KSR-155 cassette player for my Corvette, I wanted to upgrade from the factory AM-FM and stay period correct. However there is no wiring diagram with or on the head unit. This is a stem-style unit, which was probably made in the late 80's to early ninety's. Does anyone have or know where to find a wiring diagram?

[PaulD]

wow, that's quite an old unit. Where did it come from, where did you buy it ?

[Vettebrat]

Picked it up on Ebay over the winter. Figured I'd hve it up and running by now, but the weather has been crappy all winter and I have no garage room. Actually wanted an Alpine, but working units in the right agr range are pricey.

[PaulD]

Ireally wouldn't even know where to start ....you should be able to figure out power and ground, once you get it running you can use a test speaker to figure out what speaker wires go where. Just tun the fader all the way to the front then the balance all the way to the right - only two speaker wires when combined should be playing. Adjust the fader and balance for the other three corners.

[Vettebrat]

The main thing thatsthrowing me is the fact thatthere are only five wires that appear to be used for speakers. Is it possible that all the speaker wires use a single ground?

[PaulD]

that used to be common ...... you can try my method out, it will tell you real quick like.

[Vettebrat]

Thanks for the info, at least now I feel like I may be getting somewhere.