zerpie2

I assume you're talking about a drop in the voltage from the ignition switch to the starter solenoid? I have that problem on my 260Z. There was a 3 volt drop to the starter solenoid. My solution was to wire in a relay that was tripped by the 9 volts I have to the solenoid wire and then draw direct battery power back to the starter solenoid.

For a similar project I used common household bleach to remove the chrome and copper that's adhered to the Z cars tail light bezel. I'm thinking remove the hatch and use the dish of the rear window you hold as much bleach as it can. This process may take days to finish. The bleach reacts with the copper and causes it to lose its adhesion. The process emits some pretty nasty maybe even toxic fumes so be careful. Regardless I'll be following to see what your end results might be whatever you choose to do. My rear defroster has never worked either.

If it has two large wires, white and white/red, and two small wires connected to it then this is the shunt. This is what controls the amp meter on the dash.

I 3D printed my own using soft TPU filament. If you want the .stl file, let me know and I'll upload it to thingiverse.com and give you the link.

I upgraded almost every bulb to LED in my 260Z. It won't really matter what kind of bulb you use it will be brighter than the original. You will come across polarity issues. LEDs are polarity specific but the Datsun didn't always keep the polarity straight. You will need to do some rewiring in the dash if you replace those bulbs. if you replace the bulbs in the dash you will need to get a special pulsed variable resistor for LEDs to replace the old Datsun dimmer switch. For the turn signals you will need to get special flasher relays that work with LED bulbs. There's no need to put resistors in the line. For a headlights you will need to wire in a 5-pole relay in order to reverse the polarity. Do not put LEDs on the license plate lights. That will be way too bright. Good luck.

Yep, rotate the short arm 180 degrees (I think that should help). Also try running the wipers on a wet windshield. If that's enough to pass inspection then great. Just get past inspection then use rainex. The Honda motor swap really works well. Here's a video of the Honda motor at work on the intermittent setting on a dry windshield. Please ignore MC Hammer music in the background.? 20170204_181120.mp4

The Datsun Z wiper motor is too weak. I did a motor swap from a Honda Civic (I think). It's an easy swap that will require drilling new holes in the mounting bracket and some wiring changes. A standard relay will have to be wired in so that the wipers will park correctly when turned off. You'll have to do an internet search for this swap in a 240Z because the wiring changes between the 240, 260, and 280. I got the motor from eBay for $30 and the relay was maybe $5. Now my wipers are better than stock.

It's either a faulty solenoid or a voltage drop in the ignition circuit. I had the same problem and found I only had 9 volts to the solenoid. To solve the problem I wired in a relay. The relay actuates with the 9 volts then switches on 12 volts from the battery to the solenoid. If you have full voltage to the solenoid then the solenoid is probably the culprit.

It's most likely a bad contact in the turn signal switch. That's what happened to me. Open it up, clean the contacts with a pencil eraser, and possibly make a small bend to the armature so that good contact is made.