So, went for a drive today, and noticed that my blinkers were not working, so I turned on the flashers, no joy.

Got home and tested a few things, here is the results:

No horn, parking lights, brake lights, flashers or blinkers ( is there another Fuse Link somewhere?)

Headlights, gauges, dome lights, radio, wipers all work,..... forgot to test the fan ;-(

Quickly swapped fuses on the tail light circuit with no luck.

Before I dive in, looking for suggestions on where to dive into......

I was thinking flasher unit or emergency light switch, but I think that should not impact the horn or brake lights.....

All was good before, so any suggestions or advice is appreciated.......

What model and year?

The car is Jan '71 240z

I did check the heater fan, that works.

I changed all the fuses, checked for power, all good at the fuse box. Did notice the "Stop" fuse get hot when the flasher was on....

Need to check the fuses on the Parking light upgrade harness, since the parking lights don't work.....

Seem to remember awhile back an issue with one of the side marker lamps many years ago..... Might pull all of them.

Any other suggestions is appreciated.....

The fuse box on the early model are very suspect. Turn it over if you haven’t already and check the connection’s. A fuse connection sounds suspect to me for the multiple issues you are having.

I did check the fuse box, no melting, so happy about that......

Went through a bunch of stuff, noticed that the wires around the blinker flasher looked melted, so I replaced the flasher unit with old spare, and that issue is solved.

Got the tail lights working, with the fuse replacement on the harness for the "parking light upgrade harness".

Brake lights are now working too............so need to work on the horn, which clicks when I hit the button, I also want to figure out the hazard lights flasher unit. Not sure where that is, but I hear something on the passenger side....... Is that unit the same as the blinker flasher unit? Do not like the heat on the fuse box, but it's not like I use the emergency flashers..........

Progress,,,,,,,,,,,,,,,,,,,,

The flasher for the hazard lights is the same type used for the turn signals. The hazard lights flasher is located at the passenger side relay panel.

Since you hear a click with the horns, it may be that the horns are corroded. On my 73, I used a wire wheel on a dremel to polish the positive contact and grounding points. You should use silicone grease on those areas before re-installing to delay future corrosion.

One way to reduce heat on the brake light circuit after you get the hazards working would be to swap out incandescent bulbs with LED bulbs. LEDs draw less current.

@SteveJ You are our “go to guy” in electric issues Steve. We appreciate someone who knows more than “It bites you, but you can’t see it”…….. like me. Live forever!!!!🥳

Edited 8 hours ago8 hr by Diseazd

Stevej's recommendation for LED bulbs is spot on. I would go so far as to recommend all external bulbs be LED. If you do that be sure to use colored bulbs that match the lense color they go behind. And you will also need to replace the blinker and hazard flasher with electronic units which are available on Amazon. I used these.

https://www.amazon.com/Hbxdeco-LED-Flasher-Relay-Replacement/dp/B0DBQDY9PX/ref=mp_s_a_1_4?c=ts&dib=eyJ2IjoiMSJ9.r0vtsr6gvhaP0JqIkrNNWe1VSyoKzqOmRDZMqIRm6Sx2S7hdmByoSlq5B7nnOyC4MjUdGvYR06DT5etEUXNzrXbi7AcSH8Rng3yRz4GSf1YwuYjEHcbLtbKRPcP3uDHyo1Fn9msBVau9Fk45nP6kIF-9rnZd6556d6neZaina6L_ZLR8n8uvVl9wvzzTfmPOdAe6JyV2wZsad-_tpTWpyg.1qmzhFAIKk5rXUhbY14Gkd6aGisVISftIH7AlWO7sMs&dib_tag=se&keywords=Automotive+Electronic+Flashers&qid=1756048201&s=automotive&sr=1-4&ts_id=15716621

Thanks for the notes,

I will check the passenger side relay panel again. I didn't see anything that is like the flasher unit for the turn signals. But will take another look. There was a small rectangular unit that looked like it was "ticking" when I put the hazards on, but maybe I missed something. Will try to get a picture

I will check out changing the tail lights out to LED, maybe that will drop the current. I might put an amp meter inline with the fuse to see if I can get a reading

Didn't know they made red LED tail light replacement for the z car type bulbs..... will check into that.

I am going to run a wire to the horn to make sure I am getting 12v there when I hit the horn.
Thanks for the help

1 hour ago, WJ4Fun said:

Thanks for the notes,

I will check the passenger side relay panel again. I didn't see anything that is like the flasher unit for the turn signals. But will take another look. There was a small rectangular unit that looked like it was "ticking" when I put the hazards on, but maybe I missed something. Will try to get a picture

I will check out changing the tail lights out to LED, maybe that will drop the current. I might put an amp meter inline with the fuse to see if I can get a reading

Didn't know they made red LED tail light replacement for the z car type bulbs..... will check into that.

I am going to run a wire to the horn to make sure I am getting 12v there when I hit the horn.
Thanks for the help

You can look for 1156 & 1157 bulbs on Amazon in all different colors. One bulb is a single filament one bulb is a dual filament

nice, thanks for the quick numbers to look up.

I think this relay is the issue with too much current being pulled when the flashers were on.......

Are the relay the same for series one cars and other 240z?