98goldws6

iTrader: (33)

I've been looking and reading alot about converting my harness over but having trouble in seeing where to come in with ls harness. I have the f3 (chassis connector) on my 1995 240sx harness figured out I believe, but after much reading, I am confused on where to begin on ls1 harness. Most of it seems to be plug and play minus some wires that I need to run from ls1 harness to f3 240 connector.
I have read through most if not all of this thread
https://ls1tech.com/forums/conversio...swap-faqs.html

This is my first wiring job. I've done some wiring, just not car harnesses.

any help is appreciated.

98goldws6

iTrader: (33)

My ls1 harness/computer is out of a 2000 camaro

psiconversion

iTrader: (5)

Are you having issues with wiring power and grounds or the gate wiring?

Jon
PSI

98goldws6

iTrader: (33)

This is info I have found and going off of right now for the 240sx harness. Will I just need to match up to corresponding wires on ls1 harness? If so, I am having trouble finding that data for the ls1 harness...



F3 Plug connections for LSx Swap

Connect to Wipers - needed if you want to keep your wipers
leave these UNCUT
4 (Pink)- F9 - Windshield Wiper Amp
5 (Light Green)- F7 - Windshield Wiper Motor
6 (Light Green/Black)- F7 - Windshield Wiper Motor
7 (Light Greed/Red)- F7 - Windshield Wiper Motor
8 (Brown)- F9 - Windshield Wiper Amp
19 (Blue/Yellow)- F9 - Windshield Wiper Amp
42 (Purple)- F9 - [SE Models Only] Windshield Wiper Amp

Connect to Engine - Needed for water temp Gauge
leave these UNCUT
2 (Black)- F14/F15 - Engine Ground
20 (Yellow)- F27 - Engine Temp from (gauge Cluster) Engine Temp Sensor

Connect to LS Harness
17 (Orange/Blue)- F1 - Cooling Fan Relay 1 Trigger (Ground)
18 (Yellow/Red)- F1/F5 - Tach Signal (connect to ABS too if keeping ABS)
22 (Orange)- F1 - Check Engine Light (MIL/CEL) from ECU (Ground switch)
27 (Black/Pink)- F1 - Fuel Pump Relay Trigger (ground)
34 (Orange)- F1 - Ignition Start Switch from dash to ECU
41 (Blue/Green)- F1 - Cooling Fan Relay 2 Trigger (Ground)

Optional Harness Power Connections
1 (Black/Red)- can be used for PCM Ignition switched Power
9 (Red)- F1/F2 - can be used for PCM un-switched Battery power
10 (Brown)- F11/F17/F23 - can be used for Fused Power For O2 Sensors
26 (Black/Yellow)- F23 - can be used for TAC Ignition switched power/ or power for trans and MAF
39 (Green/Orange)- F25 - can be used for Ignition switched power for trans and MAF

Needed for Cruise Control - only if using cable throttle
leave these UNCUT
23 (Blue/White)- F8 - Cruise Control Actuator
24 (Blue)- F8 - Cruise Control Actuator
47 (Green/Yellow)- F8 - Cruise Control Actuator
48 (Blue/Black)- F8 - Cruise Control Actuator

Needed for AC
32 (Yellow/Black)- PCM AC "ON" signal from HVAC
43 (Black/Pink)- PCM AC Relay Trigger from ECU (Ground) (this is routed through the triple pressure switch see note below)

Not Needed
3 (Blue/Red)- Rear Defroster Sensor Signal from defroster to ECU
11 [not used]
12 (Red)- Consult Connector Signal
13 (Yellow)- Consult Connector Ground
14 (Green)- ABS/ECU Consult Connector
15 (Green/White)- ABS/ECU Consult Connector
16 (Yellow/Green)- VSP (Speedo Signal from Cluster to ECU) (this is a speedo output from the cluster, you need to hook up the speedo on the lower harness)
21 (Blue/White)- AC Ambient Switch Signal (Ground)
25 -[not used]
28 -[not used]
29 -[not used]
30 -[not used]
31 (Purple/White)- Power Steering Oil Pressure Switch
33 (Yellow/Blue)- [MT Models Only] 5th Position Switch Signal (Ground)
35 [not used]
36 [not used]
37 (Orange/Blue)- (AC) PAIR
38 (Green/Black)- ABS/ECU Consult Connector
40 (Green/Orange)- [MT Models Only] Neutral Position Switch Signal
44 (Blue/Red)- IACV Solenoid Signal
45 (Orange/Black)- AC Triple Pressure Switch Signal (Ground)
46 (Orange/Blue)- AC/Thermo Control Amp

Other things that need to be done:
-Pin 1 of the Fuel pump relay is currently connects one side of the coil to a fused ignition switched power source, this connection must be cut and instead tied to ground. Needed for the fuel pump to work

-the AC triple pressure switch connector must be cut off and the wires spliced together such that the switch is always "ON", needed for AC to work.

Lower KA Harness Connections
E209 - Connect to LS Alternator (if alternator has wire going to the starter then you can piggy back off of the starter connection)
E211 - Connect to LS Starter Trigger
E216 - Connect to the Speed Sensor output on the LS PCM (need a converter box to quadruple the speed signal)
__________________

aknovaman

iTrader: (7)

If you splice all of the ac connector together you will ground the +5v reference and have major problems. Plz clarify your guidance.

98goldws6

iTrader: (33)

Sorry, here is a link that I have been reading in hopes of grasping on. Sorry, I'm definitely a newb on most of this. I figured if I can build my motor, I should be able to wire her up.

http://forums.240sxone.com/showthread.php?t=7091

98goldws6

iTrader: (33)

I will not be running ac or any of the heater controls. This is strictly a track car. I need it to run, be able to tune off of obd2 port, and have brake lights/headlights/wipers. I believe that is it.