Engine/Transmission (1994 - 1998) Exhaust brake wiring to TC Lockup

[DBCooper]

Ok, so I don't know what the title should be, but I did get you to look! My question is that now that I have my BD exhaust brake in I would like to wire it so that it only comes on when the torque converter is locked. I really don't see a need any other time except for warmups in the winter. I have the DTT trans and Smart controler but electrical stuff isn't my strong point. If anyone knows how to do this please be specific. I know which wire is the lockup signal, but what do I do with it? Thanks for any help.

Dan

 

[JBlock]

Call DDT for wiring instruction on that request. If due able, you can bet they've tried it.

 

[DBCooper]

DTT didn't answer my origonal question when I posted it on their board last year. Slybones has done it, but I can't contact him because he's not a TDR member any more (I think) and I can't get onto the Northwest Bombers web site due to a server change that has my account all honked up. Slybones did it with a relay and diod, but like I said, I'm no electronics guy and need some specifics, like a drawing and relay types... I feel so stupid when it comes to this stuff. Thanks

 

[Howard Durand]

There is a relay board kit put out by Carls Electronics (http://www.ElectronicsKits.com) that would work very well for what you want to do. It costs $12. 95 plus shipping.



It is a kit and requires soldering experience plus some knowledge of electronics, but is easy to assemble.

If you are not experienced in this stuff, I could help you.



It is an ideal circuit for what you want to do. It can be tapped directly to the TC control wire without affecting normal operation of the TC.

The board has two built in relays. You would use the proper one of them in series with the switch for your exhaust brake.



When the TC is unlocked, there is 12 volts on the wire that runs between the TC solenoid and the PCM. When the PCM calls for TC lockup, that voltage drops to near zero. If that wire is tapped and properly connected to the relay board, the relay will operate when TC lockup is called for.

When TC drops out and the voltage rises to 12, the relay will open.



The board requires 12 volts dc for operation and could be mounted in a small box about anywhere you would want to put it.

The kit number is CK1619 and is listed under relays as "Dual Hi/Lo Switched Relay Board"



If you want, I can send you a drawing of the relay showing how to connect it for what you want to do. Or, I would assemble one and send it to you for whatever the parts and postage costs.

 

[DBCooper]

Howard, that is a very generous offer. I have PM'd you. Thanks.