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Discussion Starter · #1 ·
About 10 years ago my key switch wouldn’t go to start. A mechanic said it would cost $200 to fix it and I believed him. So I installed a push button which has worked perfect all these years. Then recently I learned from utube their is an inexpensive fix. So I removed the switch, installed the new one and somewhere in the process I lost the radio, a/c, and power windows. I checked the fuses, all ok. I put the old switch back in with the same results as with the new switch. Does anyone have a suggestion for the next move? I’m stumped. Should have stuck with the push button.
 

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Is the actuator rod moving when you turn the key?
If yes, then the ignition switch needs adjusted… the easiest way is to turn the key backwards (CCW) to accessory, then unbolt the ignition switch and slide the part of the switch that the rod attaches to the furthest position. Next bolt the switch back into place.
if no, you need a new ignition switch actuator yoke.
 

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Yo JSB,

NOTE: Accessories that fail to operate with the key in RUN, or that remain on when the key is turned off, may be the result of a misadjusted ignition switch rather than a malfunctioning ignition switch. Refer to this Ignition Switch Adjustment:

Ignition Switch


  1. NOTE: A new replacement ignition switch (11572) assembly will be set in the RUN position as received.


    Adjust the ignition switch by sliding the carrier to the RUN position.
  1. Make sure the ignition switch lock cylinder (11582) is in the RUN position. The RUN position is achieved by rotating the ignition switch lock cylinder approximately 90 degrees from the LOCK position.
  1. Install the ignition switch into the column actuator hole. It may be necessary to move the ignition switch back and forth slightly to align the ignition switch mounting holes with the lock cylinder housing threaded holes.
  1. Install retaining screws. Tighten to 6-8 Nm (53-71 lb-in).
  1. Connect the electrical connector to the ignition switch. Tighten lock screw to 0.8-1.3 Nm (7-11.5 lb-in).
  1. Connect battery ground cable (14301). Check ignition switch for proper function, including START and ACC positions. Also, make sure the column is in the LOCK position.
NOTE: Do not apply lubricant to the inside of the ignition switch.
Test the steering column ignition system mechanical operation by rotating the ignition switch lock cylinder (11582) through all positions of the ignition switch. The movement should feel smooth with no sticking or binding. The ignition system should return from the START position back to the ON position without assistance (spring return). If sticking or binding is encountered, check for the following:
  • burrs on the ignition switch lock cylinder
  • binding ignition switch lock cylinder
  • shroud rubbing against ignition switch lock cylinder
  • burrs or foreign material around the rack-and-pinion actuator in the housing of the ignition switch lock cylinder
  • insufficient lube on actuator
  • binding ignition switch

Multi-Function Switch Continuity Test
Refer to the diagnostic charts to resolve concerns with the turn signal and windshield wiper switch.

MULTI-FUNCTION SWITCH CONTINUITY TEST, F-SERIES, BRONCO
To Test​
Connect Self-Powered Test Light or Ohmmeter to Terminals​
Move Switch to These Positions​
A Good Switch Will Indicate​
Flash-to-Pass​
196 (DB/O) and 12 (LG/BK)
15 (R/Y) and 13 (R/BK)​
Pull and hold lever stalk toward steering wheel​
Closed circuit​
Dimmer HI Beam​
15 (R/Y) and 12 (LG/BK)​
Lever stalk away from steering wheel​
Closed circuit​
Dimmer LO Beam​
15 (R/Y) and 13 (R/BK)​
Lever stalk in detent closest to steering wheel​
Closed circuit​
Turn Switch Circuit​
44 (LB) and 9 (LG/O)
44 (LB) and 3 (LG/W)​
Turn switch to TURN LEFT and hazard switch to OFF​
Closed circuit​
Turn Switch Circuit​
44 (LB) and 5 (O/LB)
44 (LB) and 2 (W/LB)​
Turn switch to TURN RIGHT and hazard switch to OFF​
Closed circuit​
Hazard Switch​
385 (W/R) and 2 (W/LB),
5 (O/LB), 3 (LG/W), 9 (LG/O)​
Hazard switch on (button depressed), then released to FULL OUT position)​
Closed circuit​
Stoplamp Feed-Through Circuit​
511 (LG) and 9 (LG/O)
511 (LG) and 5 (O/LB)​
Turn switch to center (no turn) and hazard switch to OFF​
Closed circuit​
Washer Switch Circuit​
590 (DB/W) and 993 (BR/W)​
With wiper switch off, push washer switch in; release washer switch​
Closed circuit
103.3k ohm​
Wiper Switch Circuit​
589 (O) and 993 (BR/W)​
Off
Int
Lo
Hi​
47.6k ohm ± 5%
11.33k ohm ± 5%
4.08k ohm ± 5%
Closed circuit​
Interval Time Adjust​
590 (DB/W) and 993 (BR/W)​
Int and Off​
Rotate control toward OFF; ohmmeter will show smoothly increasing resistance from 3.3k ohm min. to 103.3k ohm max.
(± 10%)​
Lo and Hi​
3.3k ohm 10%​



Ignition Switch Continuity Test

NOTE: For an engine-won't-crank condition with an automatic transmission (7003), determine if the condition exists with the shift control selector level in both PARK and NEUTRAL positions before performing the ignition switch continuity tests. If the no-crank condition occurs in one shift lever position but not the other, a more probable cause is the neutral start switch located in the transmission.






Disconnect ignition key warning switch terminal and wire from the ignition switch (11572). Test the continuity of the ignition switch as described in the following illustrations. Connect a self-powered test lamp or ohmmeter between the blade terminals indicated on the chart. No continuity between any blade and chassis ground should exist in any ignition switch position except the proof Circuit 41 (BK/LB) (Pin P1) and Circuit 512 (T/LG) (Pin P2) in the START position only.

Ignition Switch, F-Series and Bronco
Rectangle Font Schematic Parallel Diagram
 

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1986 Bronco Eddie Bauer 5.0 mostly stock
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Have you ever inspected your fusible links on the starter solenoid? With power out to a bundle of high draw items like that it makes me think something like a fuse link or a bad ground maybe.
 

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the new switch might be defective. i put a new switch in someones f150 and it was defective. old one would not crank engine. new one would crank engine but not supply power to EFI. it sounds like yours is not giving power for Accessory

when you get that issue fixed we can start with the no-crank issue. put the truck in Nuetral and see if it will start with the key. does the reverse lights work? you may need to adjust or replace the MLPS on the side of the transmission.
 

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Discussion Starter · #8 ·
DId the new switch allow your bronco to crank?
Ò
Have you ever inspected your fusible links on the starter solenoid? With power out to a bundle of high draw items like that it makes me think something like a fuse link or a bad ground maybe.
To better explain robbz28 question about if the new switch allowed the engine to crank, the answer is no, but once the switch is in the run position the engine will crank and start using the push button. The problem is I’ve lost the power windows, radio, and a/c.
 

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Discussion Starter · #9 ·
Ò

To better explain robbz28 question about if the new switch allowed the engine to crank, the answer is no, but once the switch is in the run position the engine will crank and start using the push button. The problem is I’ve lost the power windows, radio, and a/c.
Sorry for all the “no’s”. I’ve never gotten use to this “new” updated site.
 

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Discussion Starter · #11 ·
I took the new switch out and replaced
it with the old switch. No change.
Thanks kingfish for no start offer. Monday my main mechanic is going to work me in hopefully. Like I said earlier, I should have left well enough alone. I ve gotten to the age (77)where I screw up as much as I fix. I appreciate all the help from everyone.
 

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Thanks kingfish for no start offer. Monday my main mechanic is going to work me in hopefully. Like I said earlier, I should have left well enough alone. I ve gotten to the age (77)where I screw up as much as I fix. I appreciate all the help from everyone.
My mechanic found the problem in about 5 minutes. A wire had somehow gotten pulled out of a connection. Wonder who did that?😏
 

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'88 XLT. 2" lift, 3G, Saginaw Pump, Headers, High flow 3" cat, 3" exhaust, 6 litre tune, K&N
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At 77, you have earned the right to screw your own stuff up :LOL:
 
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