SteveJ

The adapter bypasses the stock external voltage REGULATOR as the "high output" alternators are internally regulated. If you have both an external and internal voltage regulator in the circuit, the internal VR won't see the battery voltage, so it jacks up the output voltage.

The Georgia Z Club did a swine & wine drive (BBQ for lunch followed by a winery trip). The wife and I went from the start to the BBQ portion. The club prezident always picks some great backroads for us to drive across North Georgia.

Did you jumper out the voltage regulator?

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No. https://www.datsunzparts.com/services/

I don't like doing tests with loose wires. It's too easy to short something out. I prefer taking measurements. For instance, with the 6 pin connector plugged in, you should have 12 VDC to ground at the green/blue wire.

There is supposed to be continuity between those wires when the parking light switch is in the ON position.

Yes, you can test. Remove the steering wheel cover. Unplug the 6 pin connector. Turn the switch from OFF to position 1 (no headlights). Check for continuity between the green/white and green/blue wires on the switch. (See photo.) Also, in the fuse box, measure voltage TO GROUND on either side of the 3rd fuse down on the right. Both sides of the fuse should have around 12VDC to ground. The 240Z fuse box is notorious for damage to this area of the fuse box. So, what can cause the parking lights not to come on? Here are some causes: The fuse is bad or improperly seated. The 6 pin connector on the switch was not plugged into the dash harness or was not plugged in correctly. One of the solder joints on the switch has gone bad. The mechanism in the switch is worn out so it is not pushing the rocker to make contact in the switch. If you cannot diagnose this yourself, you may need to send the switch to someone like myself who has the experience to diagnose and repair headlight switches.

With it snapped off, it is undriveable. You have gasoline vapors coming into the passenger compartment. You need to plug the hole in the vapor tank and plug the vapor line. This may mean a more difficult time in filling the tank. Ideally, you would remove the vapor tank and the broken fitting. Plug the vapor lines in the short term and find someone to weld the fitting back in place.

I know to add a fuel filter to the driving spares for the car.

Send me a PM if you want to bring your car to me to fix. I'm available tomorrow. I'm about half an hour away from you.

Get the to the connector for the high/low beam switch in the steering column. Unplug it. On the dash harness side of the connector, measure resistance from the red/black to the red/ white wires. Report the reading.

I forgot to ask. Does your car have old style sealed beam headlights, H4 bulbs headlights, or LED headlights?

Yesterday I tightened some loose bolts on the intake, so I decided to fill the tank and see if I got rid of the "tick". The tick was still there. When I parked the car in the garage after filling the tank, I thought I smelled fuel. I popped the hood to sniff and look. No leaks there. I walked around and found gas leaking from the left vent hose, and an pretty good stream, too. I pushed the car so the leak was hitting the driveway, and I started siphoning the gas out of the tank to drop it below the vent hose. After a while, I went to remove the bad end. The rubber had completely broken down, and turned gummy. Imagine that happening with only 11 years sitting soaking in gasoline turning into varnish. I capped the vent hose and ordered parts to run the replacement hose any way I need to get it to match up to the intact upper part of that vent hose. The other problem that is lurking is that there is loose rust in the tank. I pulled some out when I was siphoning the tank.

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I didn't say it would be easy. 😉 The thing is that you don't want them to come loose easily. I had that problem when I bought my 260Z...and came back again after I got it fixed once. It's been over 5 years since I messed with those bolts. A stubby wrench may work in there better. Of course, you lose some leverage.

The first two links are just for 1 set of contacts each. It would probably be best if I shoot a video on what you would need to do. This may be a better place to shop if you need several. Here is a single contact: https://www.wiringdepot.com/store/p/449-JT-T-2557F-1-Wire-Universal-Single-Contact-Light-Socket-Pigtail-Base-w/-Fiber-Washers-Tension-Spring-2-Pcs.aspx Here is the two contact: https://www.wiringdepot.com/store/p/449-JT-T-2557F-1-Wire-Universal-Single-Contact-Light-Socket-Pigtail-Base-w/-Fiber-Washers-Tension-Spring-2-Pcs.aspx You will need to splice in the new contact. You may want to get a good crimping tool with a ratcheting action if you plan to use butt splices.

If you need just a couple, this may work out cheaper searching vendors here: https://www.google.com/search?q=pico+phenolic+contact&sxsrf=AOaemvIFZRsPlAWEcaxJyauvypZlYuMWXA:1630631418539&source=lnms&tbm=shop&sa=X&ved=2ahUKEwihitizz-HyAhVEhOAKHaHUDDMQ_AUoAXoECAEQAw&biw=1920&bih=969

For the dual contact sockets, you can get these: https://www.amazon.com/gp/product/B001RPV6GE Here's the single contact: https://www.amazon.com/Pico-Universal-Replacement-Phenolic-Weatherproof/dp/B001RPTMYC They also are available in bulk. I just added them to my Amazon wish list.

Thanks @Zed Head. I moved the switch to the port closest to the clutch fork. The switch makes contact in reverse. As I looked more carefully at the transmission, I realized I have the truck 5 speed.

Your suspicions are likely correct. It is probably the switch at the turn signal. It swaps which wire comes into contact with ground. In this case, the switch is not bringing the red/black wire into contact with the ground wire.

I forgot to mention that the transmission is an early 5 speed from a 280Z.

The reverse lights never came on when the car was in reverse in my 240Z. Twenty-four years ago, I replaced the switch, but the lights still didn't come on. I decided to try again. I installed a new OEM switch and checked the leads for continuity. No go. I moved the gear shift and found that the transmission pressed on the reverse switch in 4th gear. I assume there's no way to fix this without opening the transmission.

https://www.zdriver.com/forums/280zx-s130-forums-77/79-83-280zx-distributor-repair-kit-43187/ @kickstand80It's okay to name other Z car sites here and post links to them.

Remove the bolts at the back of the driveshaft.