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Overdrive light cycles with brake application

5277 Views 1 Reply 2 Participants Last post by  miesk5
Hope I'm in the right forum. Have several symptoms. Can't make sense out of them. 1. Overdrive light cycles on and off with application of the brakes. If lights off, touch brake pedal and light comes on, touch brake pedal again - light goes off. Turn on emergency flasher and OD light cycles with every blink. Have removed all turn signal/ brake light bulbs, disconnected OD switch harness from switch, changed BOO switch. No effects. Can't find any shorts, wiggle tests have no effects.Transmission does actually shift in and out of OD when this is occuring. 2. Truck can be running fine, stumbles - doesn't matter if your idling, driving, cold,warm, or hot - and now it is barely running, like missing on all eight. Have new plug wires,ASF42c plugs gapped @ 0.044", new cap, new rotor, hell I even replaced the distributor and TF module. Still does it with no warning. Can run fine for days or weeks, then suddenly it's completely stupid. I have discovered that if you turn it off, crank it right back up for that 3-5 seconds after start-up when the engine revs to about 1500 rpm it runs fine then slows down to stupid again.Pulling Spout doesn't help. Static timing is 10 degrees BTDC. Oh yeah, when all this mis-firing is occuring the tach is everywhere.
3. If those aren't strange enough try this one. Most of the time the truck is fine, E4OD behaving. Turn engine off, re-start and now it can't quite figure out when to lock the torque converter. It's like slipping, but not exactly like slipping. Then it may look-in go 2 miles or 200 and do it all over again. Turn vehicle off, let cool completely, re-start and drive all day no slip, no shift abnormalities. Turn off, turn on and here we go again. Engine codes are none to nearly all of them. Nothing consistent. Have checked MLA, all sensors, solenoid resistance readings, and applied different brands of scanners. I now have about 4 technicians eager to know what I finally figure out.
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yo!
Had almost same situation in my 96 a few yrs ago;

I need to look for my notes on what fuse blew due to a harness short under steering column that affected the OD Cancel Light (it blinked randomly, no Trouble Codes or tranny malfunctions though); Doesn't matter what fuse it was since it is diff in your year anyhow...

Here is a TSB that deals with it; for a 92 though.. and may apply... even tho year range is off... and your OD sw is in dash and 96's are on end of tranny stalk....but... itsa pure guess on my part..and it's an ez no $ check anyhowz
1992 Ford Truck F 150 4WD Pickup V8-351 5.8L
Vehicle Level Transmission and Drivetrain Technical Service Bulletins Customer Interest Electrical Systems - Multiple Malfunctions
Electrical Systems - Multiple Malfunctions
Article No. 92-22-5 10/21/92
LIGHT TRUCK: 1992 BRONCO, F SUPER DUTY, F-150-350 SERIES
ISSUE:
The transmission control switch wiring may be misrouted causing a short in the steering column and a blown # 17 fuse. The following symptoms may be associated with this concern.
Early shifts
Loss of power
Poor acceleration
3-4 shift cycling
Transmission control light cycling ON/OFF or inoperative

Transmission control switch inoperative
Rear Anti-Lock Brake System (RABS) electronics (dash lights on, etc.) inoperative
Loss of instrumentation (tach, fuel gauge, etc.)
Unable to read Self-Test codes (solid tone only)
ACTION:
Inspect the transmission control switch wiring for damage and repair or replace as necessary. Refer to the following procedure for service details.
1. Remove the steering column cover. Refer to the 1992 Bronco/F-Series Service Manual, Section 11-04B, for the removal procedure.
2. Examine the transmission control switch wiring for damage, Figure 1. (I don't have this Figure)
3. Repair or replace the wiring as necessary.
4. Install the steering column cover. Refer to the 1992 Bronco/F-Series Service Manual, Section 11-04B, for the installation procedure.
CAUTION:
DURING REASSEMBLY, ROUTE WIRING AWAY FROM ATTACHING SCREW SO AS NOT TO PINCH OR DAMAGE WIRE.
OTHER APPLICABLE ARTICLES: NONE
WARRANTY STATUS:
Eligible Under Bumper To Bumper Warranty Coverage
OPERATION DESCRIPTION TIME
922205A Repair Wiring 0.6 Hrs.
DEALER CODING
BASIC PART NO. CONDITION CODE
15A808 X1
OASIS CODES:
201200, 203200, 204000, 206000, 301000, 501000, 503300, 504000, 614000, 614600
--
Can you pls explain this? "...codes are none to nearly all of them. Nothing consistent..."

What Codes, if any came up in both KOEO & KOER (with eng at normal op temp)?
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