Electrical troubleshooting

[RD's Bronco]

I have 86 Full-size Bronco EB and the radio works when the ignition is on but not when I turn it to accessory. I checked the fuses (ok)

[daverbmxer]

The previous owner probably hooked it up incorrectly. I would assume that the radio draws power from the "on" and "acc" position. When I installed my stereo I didn't have to trace the wires back that far since I just used the stock red power wire.

I'll take a look at some schematics and see if I can help you out.

[daverbmxer]

Well.. no I really can't.

All it shows is that the wipers, power windows, and radio are connected to the ignition switch by a black/green wire.

I'm sure someone else will know what to do.

[Peppy]

the contacts in your ignition switch are probably toast on and acc are two different contacts

[Steve83]

Go to the Tech Writeups forum & read the thread about "ignition actuators". Read the TSB about the ignition switch recall. Find an old Haynes manual with a red cover (eBay?) & use the logic table in the last chapter to test your ignition switch.

[RD's Bronco]

I will check these things out and get back

[bigbertha]

I have a similar problem but when I hook up the green/black cable to a power source and have my interior light nob on the interior lights turn on. And my stereo doesn't save any settings I do to it. Any ideas.?

[Steve83]

That's not similar, so don't hijack this thread. Read threads about headlight switch terminals being burned, and about the courtesy light wiring & fuse.

[Alvin in AZ]

Yeah don't be hijacking RD's thread. :/
...we're waiting for 'im to get back with an update. :)

In the meantime sign up on Autozone's website, put your
Bronco in the data base then search for -wiring diagram-.

Alvin in AZ

[miesk5]

yo,
Lock Cylinder Adjustment & Switch Pin-Out Diagram & Continuity Testing (Logic Tables) in an 83; "...The following proceedure is from the 1983 Ford Service manual, with a few minor wording changes, but should work for any year. Also included are a couple of illustrations from the same proceedure to help you visualize it..."
Source: by Seabronc (Rosie, Fred W) at Ford Bronco Zone Forums http://broncozone.com/topic/7243-ign...nt-proceedure/

Similar to;
Switch Pin-Out Diagram & Continuity Testing (Logic Tables in 87-91 (from Factory Manual and the Ford Electrical & Vacuum Troubleshooting Manual (EVTM)
Source: by Broncobill78 (Dave) at Ford Bronco Zone Forums
see attachmt. below
See note- the 37 & 297 Pairs are connected together internally in sw.