EBPV mod

[dboyw]

Hello. I have spent the last few day doing this mod to the truck. Thought I was done today until I started the truck to test. With the switch in the off position, the LED lights are on. The OD light on the column on flashing. When I would flip the switch, LED go off but it does sound like there is a "load" on the engine. I assume this was the torque converter when I did the testing on the wire.

I followed the instruction from Swamp Donkey and those from Difuser website.

Any ideas before I tear the whole thing out?

Thanks

 

[dboyw]

OK, well after looking at the directions, again, I saw that I mixed up two wires. The one for the converter and the one for the valve. Switched them and it does work when I flip the switch to the constant on position.

What I am not sure of is when I flip the switch on the on by brake position, the converter locks and the OD light starts to flash. Granted I am still in the driveway. I'll explain more after my daughter's karate class.


If a moderator should read this, please move to another forum. I think anything else i have to say or replies are no longer of a dire situation. Thanks

 

[DaveBen]

Moved by request of poster.

 

[dboyw]

Well, after having some lunch and looking over the directions and what I did, I found my mistake. I switched the wires for the EBPV and the torque converter. Fix and it does work, just not perfect.

When the switch is flipped to the constant on, it works fine. But when flipped to on by brake, the torque converter comes on without touching the brakes.

I reviewed the wiring diagram again, and I think I figured it out. This mod was made for a manual truck, and it will work fine. But for the auto, the torque converter needed to be in-line too. But when you flip the switch either way, it supplies the ground to the torque converter. Also by how the diagram is, both LEDs light with both positions.

Here is my idea, that I have not tried yet, but will by the weekend. I'm going to put a relay in between the wire to the torque converter on the side of the brake on switch. When the master cylinder sends the + signal to the switch, I will splice off of it to the relay to close the ground for the torque converter. Also need to ad one diode to the constant on LED to keep it from lighting when the brake is pressed.

What do you think?

EBPV MOD

 

[jopes]

the 2 wires on the solenoid for the EPBV which is positive and which is negitive? I take it thise solenoid uses battery voltage? I am wanting to wire mine up for a brake this weekend.

 

[dboyw]

By my understanding of the diagram, the grey w/ red is the positive and the black w/ grey is negative.

Use this site for yours.

Follow the directions for the manual and you should be good.

 

[dboyw]

Seeking help from the electrical gifted

OK, I played today and did make some gains. But still have a block.

This is the new diagram that is how I have the system now. Moved the diode from above. To me it looks like it should work, but alas...

When the switch is in brake on mode, it works great. But both LEDs light. In constant on, the torque converter does not engage.

What am I missing?

 

[95_stroker]

I havent done this mod and wont do it as I fianally gutted mine but.... If JOAT doesnt chime in here, drop him a PM as he is our electrical genius.

 

[JOAT]

Do you know the original source of the Schematic? If it's the one Jonathon (swamp) had at TDS, it was flawed and never fixed. Unfortunately he no longer has the corrected one listed at his site. Been a long time since I did mine.

At first look, the diode at the switch makes no sense. Looks like it would stop the circuit from grounding the TCC when in that mode. I'd try removing it.

The way this is wired, both LEDs would light, as one indicates TCC, the other EBPV, not switch position. Both are gettin positive from the center post of the switch, but if you move the positive for the TCC LED to a hot in run wire, it will always light when the TCC locks.

As to the electrical genius part, flattering, but I'm really more of a hack at it. Wiring looks like plumbing to me, so I just map it out that way in my head

 

[95_stroker]

Ahhh, he surfaces!!! Thanks for weighing in on this thread Don.