E4OD TC engagement

ISPKI

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Sounds as if you could find that connection from the control module to the brake light circuit, and reroute it to an SPDT relay, which would connect it to +12VDC when the LED brake lights are energized, and connect it to ground when they are not. Or, just put a bulb in parallel...
haha, yes, I could, I picked up some Grote filament housings at the local parts store for 3$. Going to wire them in tomorrow... if I dont free my hands off in the process.
 

ifrythings

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You could swap out your brake switch from a superduty 99-2010, they bolt right on and have an extra wire for ground. When the pedal is at rest it grounds out the brake light circuit and when you push the pedal it switches 12v to the brake lights. With this switch you could have no brake lights and the tcm will operate correctly.
 

BBB

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I tried to replace a tailight with a led in my 1992. Put led on left side. And when I turned my right turn signal on it would kick the TCC and the cruise off immediately!
 

ISPKI

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I tried to replace a tailight with a led in my 1992. Put led on left side. And when I turned my right turn signal on it would kick the TCC and the cruise off immediately!
Thats...weird. Mine doesnt do that but then mine doesnt have cruise control either.
 

JParson

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I second the LED brake lights. Take the LED's out and put incandescent bulbs in it. Also make sure the third brake light is working on top of the cab. TC lockup is controlled by the braking circuit as mentioned above. Quick way to burn up a good TC.
 

ISPKI

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I wired an incandescent bulb into the rear of the truck, one on each side of the truck.

Did a 200 mile drive across state, drove well but no change in behavior.

When I got back I check the function of the third brake light on the top of the cab. It illuminates when my doors open but not when I hit the brake pedal.

Inside my junction box at the rear of the truck where all my tail light connections are made is a rogue black wire that isnt hooked up to anything. I have never known what this is but maybe that is the wire for the third brake light? I had assumed the connection for that would have been way back at the fuse panel instead of going to the rear of the truck, but maybe I am wrong.
 
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