Can I bypass the computer completely in locking up the torque converter? ie: 12V to whatever pin and ground to whatever pin on the tranny through a toggle? I'm tired of trying to figure out if it's the break switch or what. I'm only gonna use it at the track anyway so I want manual control. I've tried grounding through the ALDL with a toggle switch, but had no luck. Any suggestions?TIA
Can I bypass ECM for TCC lockup?
- Thread starter noslo6
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bry593
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Ya know, it's funny....
Most people don't realize that the stock trans harness is already setup for a non computer lockup. Many go out and purchase the Painless Wiring or other harness lockup.
Well the truth is, really all you have to do is hook a single switchable hot wire to the appropriate terminal and you're ready to roll.
However, if your picky like myself, you'll add on a vaccuum switch and brake pedal switch to break contact. On the other hand, I know a few guys that run just a toggle switch. To each his own.
I tried to attach a sketch of my CZ trans harness. Normally this works, not this time.... Anyway about the only deviation from stock is the removal of the temperature switch. Other than that, pretty much as GM intended. I did route the hotwire through a brake switch and an 1980 Chevy Pickup vaccuum switch. The power is linked to an "ignition on" lead. This lead can come from a variety of sources. Just poke around with a multi-meter until you find one that is hot and branch off.
Bry
Most people don't realize that the stock trans harness is already setup for a non computer lockup. Many go out and purchase the Painless Wiring or other harness lockup.
Well the truth is, really all you have to do is hook a single switchable hot wire to the appropriate terminal and you're ready to roll.
However, if your picky like myself, you'll add on a vaccuum switch and brake pedal switch to break contact. On the other hand, I know a few guys that run just a toggle switch. To each his own.
I tried to attach a sketch of my CZ trans harness. Normally this works, not this time.... Anyway about the only deviation from stock is the removal of the temperature switch. Other than that, pretty much as GM intended. I did route the hotwire through a brake switch and an 1980 Chevy Pickup vaccuum switch. The power is linked to an "ignition on" lead. This lead can come from a variety of sources. Just poke around with a multi-meter until you find one that is hot and branch off.
Bry
Thanks for the reply Bry. If you don't mind, email that diagram of your harness to me at atmathews@hotmail.com. And what is the appropriate terminal to hook to? Do I also need to ground one of the terminals? Thanks again.
If you read my article at http://www.gnttype.org/techarea/electrical/switches.html you should be able to ascertain that all you need to do is run twelve volts to the appropriate wire on the 4-wire connector at the trans (and through a switch). But waah, just fix the damn thing. Also on gnttype.org techarea is the TCC wiring schematic that, with a little bit of common sense, can help you pinpoint the problem.
Its a simple On/Off circuit for crying out loud.
Its a simple On/Off circuit for crying out loud.
