Electrical

[1981Bryan]

I have a 1981 Bronco 351M that all the electrical went dead at the same time on the highway. I got it home and turned off the key and it was still running so i pulled the positive battery cable and it was still running so i pulled the coil wire and it finally quit. Any suggestions ? i have already replaced the ignition swith no help.

 

[Rons beast]

Hi Brian,

A little clarification is needed. You said: " all the electrical went dead at the same time."

But the engine was still running?

and then you couldn't turn the engine off? (pulling the + battery cable won't cause an engine to stop running, unless the alternator is not charging at all.)

What exactly was NOT working ?

Does the engine start and run now? (with the coil wire replaced, of course.)

Give us a few more details, so we aren't guessing so much.

Thanks

 

[Krafty]

sounds like sometihg got botched when you swapped the ignition switch. I would tear into the column and check that everything connected to the ignition is working properly and is at proper adjustment.

 

[miesk5]

yo

For IGNITION Switch Pin-Out Diagram & Continuity Testing (Logic Tables) in 80-91

Switch Adjustment 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. Remove the electrical connector from the ignition switch. Rotate the key back and forth to either side of LOCK, until a 5/64 in. drill bit can be inserted through the locking pin hole as far as possible (minimum 3/8 inch). The lock pin hole is located on the right of the switch next to the steering column tube. Loosen the two ignition switch mounting nuts. Turn the key to LOCK (feel for detent) and remove the key. move the switch up and down along the column to locate the mid-positionof rod lash and tighten the mounting nuts. Remove the drill bit from the ignition switch lock pin hole. Plug in the electrical connector and operate the lock cylinder to insure the switch is positioned properly. Confirm that all accessories are deactivated with key on the OFF position, and that all accessories are operable in RUN position..." See Diagrams

Source: by Seabronc (Rosie, Fred W) at http://broncozone.com/topic/7243-ignition-switch-adjustment-proceedure/



http://broncozone.com/index.php?app=core&module=attach&section=attach&attach_rel_module=post&attach_id=3015

 

[1981Bryan]

Hi Brian,

A little clarification is needed. You said: " all the electrical went dead at the same time."

But the engine was still running?

and then you couldn't turn the engine off? (pulling the + battery cable won't cause an engine to stop running, unless the alternator is not charging at all.)

What exactly was NOT working ?

Does the engine start and run now? (with the coil wire replaced, of course.)

Give us a few more details, so we aren't guessing so much.

Thanks

All my guages went dead I had no lights no blinkers my windows would not roll up but the truck was still running. I was on the highway

I replaced the ignition switch but the truck does nothing when i turn the key.

 

[Rons beast]

He y Brian,

Thanks for the clairfication.

First thought is there is an open between your battery and the starter solenoid, or the solenoid and the fuseable links.

Check the connections from your battery to the solenoid, and out of the solenoid. Also check your grounds. The battery to engine, and the frame to body grounds.

Good luck and let us know what you find.

 

[miesk5]

yo

Starter & Relay Harness Diagram in 80-86



by Steve