LS1 Into a LT1 Car, complete Harness
Thread Starter
Joined: Mar 2006
Posts: 21,019
Likes: 893
From: The Beach...
LS1 Into a LT1 Car, complete Harness A couple of months ago I made a thread that I have built a Harness to drop a LS1 into my LT1 Camaro. Another guy here took my Harness Idea, dropped a LS1 into a 1994 Camaro, and now he has a running car.
This is what I did to the Harness. Removing some of the wires might not be required, but it cleans it up. Where there are moved and spliced wires, that is needed. I did a couple of extra things as well, that is optional for it, but it makes it easier.
MODIFICATIONS TO LS1 HARNESS
Re-located Starter wire to under dash
Re-located Fuel Pump Relay, Tach signal to under dash
Spliced into PCM Red 15 for Alternator gauge signal, moved it to under dash
Spliced into PCM Blue 74 for Coolant Temp gauge signal, moved it to under dash
Removed AIR, EGR, AC, EVAP, Cruise Control, Rear Oxygen Sensors, Fuel Level Input, Fuel Pressure, Fuel Sensor Return/Sender Ground, Low Coolant wires
Modified C-100, Pin C into Ground wire on Car, located on Wheel Well
Moved C-105, Pin B to C-100, Pin K on Harness and on Car, took out C-105 Connector
Extra:
Re-wired Cooling Fans to constant run, spliced Brown power out on Fuse into Cooling Fan Relay wires(Blue & Green), C-100 Pins H, J now hot with Fuse #6
This is the Pin Diagram for the Harness that I built. There is only one Plug on the Wheel Well, I combined those 2 Connectors. Like listed above, a couple of things have to be done to the Car. C100, Pin C has to be a ground somewhere on the Car. I made one on the Wheel Well. Pin H on your guy's cars will have to be spliced into Pin F as well, I used the Relay Wires as extra hot wires. Everything else is Direct Plug in.
This is the guy that took the Harness and got it running.
Feel free to PM me if anyone has any questions.
I vote for Sticky..
This is what I did to the Harness. Removing some of the wires might not be required, but it cleans it up. Where there are moved and spliced wires, that is needed. I did a couple of extra things as well, that is optional for it, but it makes it easier.
MODIFICATIONS TO LS1 HARNESS
Re-located Starter wire to under dash
Re-located Fuel Pump Relay, Tach signal to under dash
Spliced into PCM Red 15 for Alternator gauge signal, moved it to under dash
Spliced into PCM Blue 74 for Coolant Temp gauge signal, moved it to under dash
Removed AIR, EGR, AC, EVAP, Cruise Control, Rear Oxygen Sensors, Fuel Level Input, Fuel Pressure, Fuel Sensor Return/Sender Ground, Low Coolant wires
Modified C-100, Pin C into Ground wire on Car, located on Wheel Well
Moved C-105, Pin B to C-100, Pin K on Harness and on Car, took out C-105 Connector
Extra:
Re-wired Cooling Fans to constant run, spliced Brown power out on Fuse into Cooling Fan Relay wires(Blue & Green), C-100 Pins H, J now hot with Fuse #6
This is the Pin Diagram for the Harness that I built. There is only one Plug on the Wheel Well, I combined those 2 Connectors. Like listed above, a couple of things have to be done to the Car. C100, Pin C has to be a ground somewhere on the Car. I made one on the Wheel Well. Pin H on your guy's cars will have to be spliced into Pin F as well, I used the Relay Wires as extra hot wires. Everything else is Direct Plug in.
This is the guy that took the Harness and got it running.
Originally Posted by daniel6718
Thanks for the help again with the harness, the merv here saved me alot of time and about 600 bux on the wire harness, ive now got the mervs custom harness working in my 94 with a 99 ls1 motor...ill get some pics soon, ive got the lid underneath a stock lt1 hood...4l60-e ms3 cam only and lots of dope!
i hate ls1, but they are faster! gota do whatcha gota do!
i hate ls1, but they are faster! gota do whatcha gota do!
I vote for Sticky..
Thread Starter
Joined: Mar 2006
Posts: 21,019
Likes: 893
From: The Beach...
Originally Posted by sworaz
+1
Wow that looks complicated
Wow that looks complicated
I'm suprised it runs after that..
I am still not done with mine. I have to put on LS2 Fuel Injector Connectors, and I am converting the MAF Sensor to the 85mm wiring, so I have to find the 5 wire plug for that and do that..
