No power to ignition switch on my 88 Ford Bronco
Posted 02 November 2017 - 02:22 PM
Posted 03 November 2017 - 04:17 AM
Hey E, welcome,
Check the fuses and the fuse panel. The ignition switch gets its power from a red wire with light green stripe. ( on these old trucks the wire could have been spliced by the previous owner) . There could be a poor connection between the fuse block inner and outer halves.
Check the fuses first.
04 Mercedes ML500
00 Linc LS "The Ride"
92 Mercedes 500SL "The Baby"
08 Mercedes SLK "The Wife's"
82 Chevy S10 Custom "The Project"
always changing (Given to my son)
96 Eddie Bauer (The Beast ) Sold
Posted 03 November 2017 - 04:37 AM
Here is the 88 Bronco ignition switch wiring diagrams @ http://www.revbase.c...oadPdf?id=21074
Check fusible link M @ starter relay near battery.
Location pics in an 88
Source: by mrwp819300 at
by Seattle FSB
Check for battery voltage on the two yellow wires at ignition switch. May need to adjust the ignition switch as described below.
Ignition 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) @ http://web.archive.o...&attach_id=6659
I got same old bull shi error message about some pics .. "you are not allowed to post the images" but it didn't specify which image... this bs is getting old and shouldn't be happening here,
Fusible Link depiction; "...most fusible links have melted/charred insulation when they burn out..."
by me via
http://www.procarcar...dia_lights2.asp read more there.
Repair & Color/ Gauge sizes; "... Fusible link wire is normal wire with special insulation designed to contain the heat, spark, and melted metal when the wire burns from excessive current draw. Fusible link wire is not rated in Amperes since its characteristics are less-obvious, but it is typically 4 gauges (AWG) smaller (higher number) than the circuit it protects. Although many vehicles now use MEGA or MAXI fuses where older vehicles used fusible link wire, replacing older fusible links with fuses is not recommended unless the rest of the wiring is upgraded to match the newer arrangement. Never replace a fuse with fusible link wire. In an emergency, smaller-gauge wire may be temporarily substituted for fusible link wire until an appropriate repair can be made; Orange - 22ga. - 0.35mm; Gray - 20ga. - 0.5mm; Blue - - - 18ga. - 0.8mm; Black - 16ga. - 1.0mm; Gray - 14ga. - 2.0mm; Blue - 12ga. - 3.0mm; Orange - 10ga. - 5.0mm; Black - 8ga. - 8.0mm..."
If all checks out but, when you turn the key to "RUN/START" and there's no spring resistance feeling, usually the actuator is broken inside the column. The ignition switch is located on the lower part of the steering column & has slots so it can be adjusted by loosening the 2 -7/16 nuts and move it up or down, but a lot depends on what's wrong up top with some of the other parts, ie: key cylinder, lower igniton actuator and upper igniton actuator. These parts are timed so when you turn the key to RUN they all need to move forward/downward so the actuator triggers the igniton switch to start the Bronco..
Ignition Actuator & Lock Cylinder Replacement 85 to 91 by Chris B @ http://chrisb.users....ing_Column.html
Let us know if you need more info.
Next time, please fill out your Signature with year, engine size, transmission type, transfer case type (manual or electric shift), locking hub type (automatic or manual) info & major mods such as a Lift, etc. for better responses.
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Here are some wiring diagrams (partial, 86 through 96) and Technical Service Bulletins, (80 through 96) @ http://www.revbase.com/BBBMotor/Wd Just register for free.
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