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Ezwiring Guide ............ Still not complete


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Ok here it is my ezwiring 1975 280z wiring guide. It is currently incomplete and I still have a few parts to workout. They are

1) How to wire up reverse lights

2) Where to source the power for my tail lights (use third break light power?)

3) What powers all my gauge's? this issue stems from the fact that according to my diagram i have to wires running into the light bulbs within the gauge's, a green white and a red blue. However the ez only shows 1 wire for this light . Thinking the the red blue runs threw my dash dimmer and alters the current flow to dim my lights? and how to hook up my dash dimmer?

4)What circuit I want to use to power my ignition box (msd unit).

anyway this is what I have worked out thus far. It shows what color the wires are and what they do

and how to connect them to your Ez harness . I hope it serves as a good starting point for others. I know that others have broken down other sections of their Z harness and how it mates to the EZ please post and help out!

 

**note connections are as follows describes the original wire color first then the EZ harness color after

 

Rear Section

Left Side Right Side Lamp

Wire Color Action

Black Yellow Stop

Red Black Reverse

Green White Tail

Green Red Turn

Black Ground

Connections are as follows

Green White Brown

Green Red Yellow

Red Black

Black Yellow Stop switch

 

 

 

Right Side Right Side Lamp

Wire Color Action

Black Yellow Stop

Red Black Reverse

Green White Tail

Green Black Turn

Black Ground

Connections are as follows

Green White Brown

Green Black Green

Red Black

Black Yellow Stop switch

***Note Stop Switch connects to fuse panel

 

 

License Plate

Wire Color Action

Green White power

Connections are as follows

Green White Brown

 

 

To Lower Chassis

Wire Color Action

Yellow To Fuel Gauge

Yellow Blue To fuel warning lamp

Green Blue Fuel Pump Power

Connections are as follows

Yellow Pink

Green blue

 

 

Dome Light

Wire Color Action

Red White Into Drivers Seat Switch To Assorted Seat Switch To fuse Box to ignition interlock

Black Red Door Switch Right Hand to C-1

Black Ground

Connections are as follows

Red White White

Brown to door jam switches

Black Ground

 

Dash

Dash General

Wire Color Action

Red blue To control Panel illumination Lamp Runs to Radio and hazard Switch

Green White To Light wiper washer combo switch Runs also to glove box lamp

Front Section of Z to T/S park lamps

Black Ground

Connections are as follows

Red blue

Green White Brown

 

Amp Meter

See Notes in book for more Install information

Wire Color Action

Green To Speedo

White To Shunt Split into two sections

Fusible Link to starter Terminal with B wire From Battery Pos

Voltage Regulator

Connections are as follows

White- Route the 10 gauge solenoid pwr = red wire from the fuse panel to the amp meter and then from the other post of the amp

meter out to your pos bat source.

 

 

Oil Pressure

Wire Color Action

Yellow Black Oil Pressure Switch

Connections are as follows

Yellow Black Lt Blue/Black

 

Fuel Gauge

Wire Color Action

Yellow Fuel Gague level Reading Unit

Connections are as follows

Yellow Pink

 

Tacho

Wire Color Action

Green To Voltage Regulator F to water temp rely to fuse box

Blue To 15k resistor to tach terminal neg on hei

Black White Bat Terminal on HEI

Note When Adjusting tach turn 45 degrees clockwise

Green Red To combination switch then to LH T/S light

Green Black To combination Switch then to RH T/S light

Connections are as follows

Green Red- White

Blue To 15k resistor to tach terminal neg on hei

Black White Bat Terminal on HEI

Note When Adjusting tach turn 45 degrees clockwise

Green Red LT Blue

Green Black Blue

Power from Purple white

 

Speedo

Wire Color Action

Red to fuse box then to Head lamp RH the fuse box R cont to run to light wiper washer switch

Note the RY line from the LH head Lamp also runs into the fusebox

Green Yellow Brake System Switch to parking break switch.

Yellow To interlock Realy to Neutral Safety Switch.

Connections are as follows

Red Lt Green

Green Yellow Brake System Switch to parking break switch

Water Temp

Wire Color Action

Yellow White Temp Indicator

Connections are as follows

Yellow White Green

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I don't have the 280z diagram, but this is for a 240z...

 

1. Backup + backup power to reverse switch on trans

2. heavy red "lights power" to combo switch blue/green were

3. there is a wire called "guage" that is the power for the guages, not the guage lights. use park or tail wire for guage lights. one wire is ground and one power. you can make your own ground. the power wire goes to a reostat, then from the reostat to the gauge lights.

4. I dont have mine wired to msd, but you will need to have a switched ign on wire attached + coil and distributor wire (I think)

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280Z-75 thanks i have been workin off that diagram tho. On a side note this morning when i got home from work i figured id strip some more of the wire out of the Z, I didn't pay attention and sliced my pinky and ring finger open! so after a number of stitch's 6 in the pinky 4 in the ring finger to be exact i figure i better get a move on this harness 'cuse the car is starting to bite back!

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Since my notes are a bit cryptic I wanted to draw out an actuall diagram so that everyone can understand it, making it as EZ as possible...har har. demand is high though so here they are!

 

"Starting with the left switch (turn signal & brights)

 

Switch Harness

 

Green ---> Purple 25 turn flasher

 

Green/blk ----> Green 26 Horn switch

 

White/Red ----> connect to 3 wires:

Blue: 21 R rear turn

16 R signal ind.

17 R front turn

 

White/Blk -----> Connect to 3 wires:

Blue 14 Left signal indicator

light blue 15 Left front signal

yellow 20 Left rear signal

 

Red/white -----> connect to 2 wires:

Green 28 Left high beam

Green 73 high beam indicator

 

Red/Yellow -----> Light brown 24 Left low beam

 

****The

previous ground goes to the White/Red of the head light control.

 

Head light control switch:

 

Green/white ---------> connect to 2 wires

brown 48 Left front park

? ? Left rear park

 

Green/Blue --------> Red 33 Switch power

*** note the red 33 splits into red and black,

Connect black side to Green/Blue

 

Red ---------> Red 01 headlight power

 

Ignition Switch

 

Blue/Red ---------> Peach 31 Ignition switch acc

Brown 29 Ignition Switch

 

Black/blue ---------> Purple 32 Ignition switch start

 

Black/White ---------> Pink 30 Ignition switch coil

 

White/Red --------> 33 red ** this connects to

the red side of the above note.

 

 

 

So thats its, It should be a good start, just be sure to keep your multimeter out and check continuity in the switch as you wire things in. It can be a bit intimidating, but its really EZ...and if you do wire something wrong, the fuses will most likely blow when you connect the battery! "

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so got some more stuff done I hope that this is help to sombody at some point

 

Front End of Chassis

 

Headlight Right Head

Wire Color Action

Red Power from fuse box/ breaks off and runs into speedo

Red White to speedo red white then to combo switch high beams 15

Red Black To combo switch low beam 16

Connections are as follows

Red white light green then to Speedo

Red red 01 headlight power red black

Red black tan

 

Headlight left Head

Wire Color Action

Red yellow power from fuse box

Red White to Speedo red white then to combo switch high beams 15

Red Black To combo switch low beam 16

Connections are as follows

Red white light green then to Speedo

Red red 01 headlight power red black

Red black tan

 

*****note headlights wire run together

 

Wiper Motor

Wire Color Action

Yellow P on amp assy Int Wiper

Blue Red to blue white to yellow green to combo Switch Wiper 2

Black Ground

Yellow Green to combo switch wiper 2

Yellow Black to combo switch wiper L

Blue yellow to wiper H on combo switch

Connections are as follows

Blue red wiper motor power

Now time for a nice little write-up on the wiper

From http://www.atlanticz.ca/zclub/techtips/wipermotor/index.htm

The Z harness, as I wired it, which I don't fully understand:

6 prong harness:

-1- -2- -3-

-4- -5- -6-

 

1: 12v, blue/red.

2: Ground, black.

3: No idea, maybe allows for proper stop/set of wipers

4: No idea, maybe allows for stop/set, seemed to read fluctuating voltage when engaged.

5: High speed, either blue or blue/yellow. Don’t remember, will update

6: Low, intermittent, and washer. Probably relay driven. Blue or blue/yellow.

 

amp assy Int Wiper

Blue to wiper combo switch I

Blue Red From Fuse to wiper B amp assy int wiper to combo switch wiper

Yellow To wiper motor

Yellow green to combo switch wiper 2 Blue red from wiper motor intersects

Blue White to combo switch W for washer motor

Blue Yellow to combo switch 3

Black Ground

Connections are as follows

Blue red wiper power

 

 

 

Break system switch

Wire Color Action

Green yellow to Speedo then splits off to parking break switch

Connections are as follows

 

 

Turn Signal and park lamp right hand side

Wire Color Action

Black Ground

Green White Power

Green Black to combo switch 11 to green black on tach

Connections are as follows

Black ground

Green black lt green

Green white brown

 

Turn Signal and park lamp left hand side

Wire Color Action

Black Ground

Green White Power

Green Red to combo switch 10 to green red in on tach

Connections are as follows

Black ground

Green red lt blue

Green white brown

 

 

 

Horn

Wire Color Action

Green white power to horn from really

Green red from fuse panel to power horn

Green black to combo switch 18 horn ground

Horn

Connections are as follows

Green white green

Green red from fuse box

Green black to combo switch 18 horn ground.

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