daddydonuts

I'll check tonight after work, I got 2 of them

Dash harness Gauge

After looking at the FSM wiring and reading the above post about the 4 wire tach harness in the dash, mine only has three wires, GW, and 2 black. The wiring diagram in the FSM has all 4 colors:GW, BW, Green and black, and I have all 4 colors at my harness at my coil. I have power to the GW and middle black wire on my dash harness. Any way to test the tach to see if it works. I also have a 280z tach that I can switch out with the 240z tach, neither get a signal from my dash harness.

I'm really apreciating all the advice and I am trying each of your suggestions. I think I am gonna have to trace the wires from the tach forward

I tested the six wires from my harness, un-connected, I can make the car run with the single BW wire and the green wire only. Nothing to my tach though.

Ok, looked in my clymer manual and the BY wire is for the solenoid that used to be on the intake (removed now). According to my manual the green wire is for the horn or fuel pump, that is incorrect. I only have one BW wire in my harness, and it goes to my ballast along with my red pertronix wire. Now I'm left with a green and BW wire that are hot at on and start, and a black wire that I will be investigating. Are the hot wires supposed to have any spliced wires?

So 40 years of being wired incorrectly...I removed some wires from the stock harness that runs in from the front of the car (it was spliced up), I have the following color wires that should be original: Black wire, Black w/yellow stripe, Green w/white stripe, Black w/white stripe, Green, and Yellow w/white stripe. I know the YW wire is for the temp gauge sensor, the BW wire goes to the ballast resistor (along with Red pertronix wire): no clue what the green wire is for and the BY wire either. The engine will run with the BW wire (pertronix red) connected to the ballast and the green wire hooked to the + side of the coil. GW wire hooked up to the other post on the ballast still does not send a signal to my tachometer. The BW and green wire both have voltage in the key on position and when starting. BW-11.3 & 10.03, green-11.15 & 9.7 when key on and start respectively. Any suggestions?

I will try that tonight, Thanks!

I have done searches and read threads from HZ with no luck. I even bought a 280z tach and no luck This may be in-experience talking, but using the pertronix with the stock 40amp alternator and voltage regulator and having my pertronix upgrade wired correctly according to a post on HZ may cause the problem with my tach not getting a signal from the coil?

I may have an 82, I just bought a complete engine. Take a pic of yours and post it, I will look at the difference

Let me see a picture of your caliper brackets if tou could, I got some but not sure they are the ones I need.

Actually send me an email address, I have two.

I have two complete intakes from a P79 head F54 block engine 81 & 82.

I have two complete intakes from a P79 head F54 block engines 81 & 82.

I have two complete intakes from a P79 head F54 block engines 81 & 82.

I will check mine and pm you.

I got 13, 12 complete

If you want them, I got them. I did not use them cause I bought a rebuilt head.

If you want them, I got them. I did not use them cause I bought a rebuilt head.

You should research more on the metal that is used in Nissan rockers, not too much out there that is better

$460.00, I tried selling for 300.00, but no takers.

I have a set of Nissan rockers, brand new!

Maybe we need more 4 day weekends and you would have time to complete your car. I'm at Benning also.