85 PU Wiring Diagram - Radio

[hatfieldcb]

Does anyone have the factory wiring diagram for an '85 2WD PU? Specifically the radio wiring. I'm trying to upgrade the stereo in my wife's truck and am having trouble. I got the later Toyota radio to power on, but no output to the speakers. I thought the right speaker was a pair of light green and light green with a red stripe. I suppose the new radio might not be working.

TIA

 

[Chartdog]

I don't know if the "they are all the same" belief carries from an 85 2WD to an 89 4Runner but................

My book shows the speaker wires as Right: light green and blue and Left: pink and violet.

**** per post below, my colors are not correct for your rig and it looks like you have it right ****

Have you thrown a meter on the suspect wires? I'm not sure what kind of current a speaker wire puts out but if it is completely dead it may show that.

My second thought would be to ask Roger Brown as he has an 85.

Good luck

 

[IDave]

This is from the 85 Truck and 4R FSM. Hope it helps. Looks like what you're describing, Chris.

 

[hatfieldcb]

Thanks Dave! That's it. Does polarity matter on the speakers? I can't imagine the crappy old stock speakers in this thing wouldn't work with this newer Toyota stereo. Is there any way to test output to the speakers? I hooked up the LG/LG-R wires to the "right front" pair coming out of the reverse harness plug and the LG-Y/LG-B wires to the "left front". Nothing. I know the speakers work because I spliced the original harness plug back in and they worked fine. There's a (dark green) G-R wire going into the plug I couldn't account for. I'm replacing the radio because it's an old-style analog tuner that drifts.

Any ideas?

 

[WristPin]

the polarity makes the speaker either 'punch' outward, or inward.

you want it to 'punch' outwards.
temporaly connect it, and watch it.

i just got a nice set of speakers and a Eclipse radio for $170. most ive ever put into a radio. but well worth it.

 

[IDave]

Sounds like you're unsure of the "new" radio. I know some of them require two power source wires, etc. Perhaps something's missing there. Don't think polarity matters much at the speakers. I would think you'd hear something either way. I'd think you'd want to check to see if theres output from the speaker wires on the "new" radio with a tester.

 

[hatfieldcb]

Sounds like you're unsure of the "new" radio. I know some of them require two power source wires, etc. Perhaps something's missing there. Don't think polarity matters much at the speakers. I would think you'd hear something either way. I'd think you'd want to check to see if theres output from the speaker wires on the "new" radio with a tester.

I put a volt meter on the "new" output wires and detected nothing. Maybe the radio is no good. Like I said, I didn't see the G-R wire on the diagram.