E4OD Overdrive Lockout Switch
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E4OD Overdrive Lockout Switch
 
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As some of you know, I'm going use an E4OD in Dad's truck. But what some of you might not know is that Steve/Foxford33 is going to use an E4OD in his Feep. ("Ford-powered Jeep", as coined by Bill/85lebaront2.) And both of us plan to use the ~1990 dash-mounted OD lockout switch.
Recently Steve asked me if I knew what bulb is used in the dash-illumination part of the lockout switch as he wants to go with an LED in it. I didn't, and still don't, but pulled out my switch to see if I could tell. Nope, it doesn't appear to have any numbers on it. In fact, it doesn't appear that the bulb itself is to be replaced as it is in a carrier, as shown below on the right.
But the legs of the "pea" bulb just wrap around in the carrier, so we could install a 12V LED with ease. Towards that end I've ordered in 10 of these 12V white LEDs from Digikey.
Also, I asked Bill/85lebaront2 for the schematic for how the switch is wired and he came up with the schematic shown farther down. I tested my switch with my DVM & bench power supply and updated the schematic with pinouts for the switch as well as the value of the resistor. And there are a couple of pics way down showing how the LED for the lockout and the current incandescent bulb for general illumination look.
I'll update this post when I get the LEDs in and do more testing. The datasheet on them shows that they'll dim as the voltage goes down but it'll be interesting to see how they compare to the other dash lights. We may need to add a resistor in series to drop the output.
 
 
Gary, AKA "Gary fellow": Profile
Dad's: '81 F150 Ranger XLT 4x4: Down for restomod: Full-roller "stroked 351M" w/Trick Flow heads & intake, EEC-V SEFI/E4OD/3.50 gears w/Kevlar clutches
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Re: E4OD Overdrive Lockout Switch
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Success! The 12V white LEDs from Digikey came in and I installed one of them. But it wasn't quite that easy.
The LED measures .219" OD on the rim and .197" OD on the body, but the opening in my bulb carrier for the switch is oval and will take a .187" drill bit with some effort. So I chucked an LED in the drill and used a file to turn it down to .175". It then went in nicely. Here's a shot showing the LED driven by 14v, so full brilliance. That may be too much and we might want to drop the voltage via a resistor in series when the time comes, but that can wait. And below that are two pics - the pea bulb, unmodified LED, and modified LED on the left, and pea bulb and LED in the carrier on the right.   
Gary, AKA "Gary fellow": Profile
Dad's: '81 F150 Ranger XLT 4x4: Down for restomod: Full-roller "stroked 351M" w/Trick Flow heads & intake, EEC-V SEFI/E4OD/3.50 gears w/Kevlar clutches
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Re: E4OD Overdrive Lockout Switch
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Re: E4OD Overdrive Lockout Switch
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Re: E4OD Overdrive Lockout Switch
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Re: E4OD Overdrive Lockout Switch
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Re: E4OD Overdrive Lockout Switch
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It was fun to figure it out and make it work. But you'll either have to come to church on Sunday or come to the shop to get your LEDs.
And it sounds like you are placing your switch in about the same spot I'm placing mine. Should make it easier to get an acceptable light level. 
Gary, AKA "Gary fellow": Profile
Dad's: '81 F150 Ranger XLT 4x4: Down for restomod: Full-roller "stroked 351M" w/Trick Flow heads & intake, EEC-V SEFI/E4OD/3.50 gears w/Kevlar clutches
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Re: E4OD Overdrive Lockout Switch
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In reply to this post by FoxFord33
Steve, I dug my old iPhone 5S out to set up for a borescope I have and want to get some pictures inside the water jacket on a 2.5L Chrysler short block. I found these pictures on it. You have the updated harness, but here is what you will be getting. I have to go over to Newport News sometime this week to deliver an arcade game for Donnie Medlin's 10 year old granddaughter. If you have gotten set up on shipping this is what you will be getting:
  
Bill AKA "LOBO" Profile
"Getting old is inevitable, growing up is optional" Darth Vader 1986 F350 460 converted to MAF/SEFI, E4OD 12X3 1/2 rear brakes, traction loc 3:55 gear, 160 amp 3G alternator Wife's 2011 Flex Limited Daily Driver 2009 Flex Limited with factory tow package Project car 1986 Chrysler LeBaron convertible 2.2L Turbo II, modified A413 |