Wiring problems on 4L65E(LS swap)
Thread Starter
Advanced
Joined: Jun 2007
Posts: 54
Likes: 0
Wiring problems on 4L65E(LS swap)
Hi there. I bought a 4L65E tranny from GMPP with the controller kit needed to make it function properly. I bought the transmission because they claimed it would fit on a LS series engine. And so it does, for starters.
The problem is with the wiring that comes along with the controller kit for the tranny.
There are 12 connecters: some are optional. But connecter 4 is weird..
In the manual that came with the transmission it says;
The TCU(trans control unit) also needs a connection to the factory distributor, performed through connector 4. This lets the computer know the engine RPM. The computer uses this information to control wide open throttle shift points.
As shown in the wiring schematics the TCU needs the tachometer signal(RPM reference) and a ground through connector 4.
My question is how am i suppose to do that when the ls series engines dont have a distributor?
Am I missing out on something here?
Can i splice the wiring for that connector with the rpm signal from the bulkhead from the ECU that came with the controller kit for the engine then?
Doesn't make much sense to me. Would be glad if someone in here knew
The problem is with the wiring that comes along with the controller kit for the tranny.
There are 12 connecters: some are optional. But connecter 4 is weird..
In the manual that came with the transmission it says;
The TCU(trans control unit) also needs a connection to the factory distributor, performed through connector 4. This lets the computer know the engine RPM. The computer uses this information to control wide open throttle shift points.
As shown in the wiring schematics the TCU needs the tachometer signal(RPM reference) and a ground through connector 4.
My question is how am i suppose to do that when the ls series engines dont have a distributor?
Am I missing out on something here?
Can i splice the wiring for that connector with the rpm signal from the bulkhead from the ECU that came with the controller kit for the engine then?
Doesn't make much sense to me. Would be glad if someone in here knew
Team Owner
Joined: Aug 2006
Posts: 24,125
Likes: 15
From: Columbia Missouri
Have you tried contacting GMPP's tech support and asking this question? The wiring kit was probably originally set up for cars later than yous that use a computer controlled distributor like the TBI and TPI systems.
It's very possible that in your situation you won't even need that connector...but that's why it would be best to find out who MAKES it and ask them.
It's very possible that in your situation you won't even need that connector...but that's why it would be best to find out who MAKES it and ask them.
Safety Car
Joined: Aug 2001
Posts: 4,883
Likes: 11
From: North Easton Mass
Print out this article:
http://www.blown.net/ls1swap/rodders...1t56wiring.doc
It has all of the harness connectors listed. I'm in the middle of wiring my car now and I've found this article very useful.
Rick B.
http://www.blown.net/ls1swap/rodders...1t56wiring.doc
It has all of the harness connectors listed. I'm in the middle of wiring my car now and I've found this article very useful.
Rick B.
