LED headlight wiring issue

[LLN260Z]

Hey guys. I bought led headlights and also doing two relay method since plug in wont work. I have a 77 260z 2+2 and my low beams work as normal operation, but when i turn my highbeams on, they turn on but do not turn off when i trigger off with the highbeam switch. 
My low beam relay is connected with passenger side loom and high beam is driver side. 
Added a photo of how I have wired it up. I suspect a ground issue and not sure exactly where.

looked at soo many wiring diagrams and read forum pages but I dont think they are aimed at LED. Just not sure why my high beam relay wont turn off when it can turn on from inside. 

[GongZ]

The first thing I would do is to disconnect the wires from the original/existing sockets – then check that both have good ground readings. I would then check for power from the low and high beam wires with the headlight switch on and selecting low, then high beam.

Your diagram shows the ground pin of the original socket being connected to the 86 (trigger) pin of the low beam relay. Since you say that low beam is working, I assume that the low beam pin is connected to the relay?

The diagram also shows that you have connected the ground pin of the existing socket to the high beam relay's coil ground pin, but the low beam's coil ground pin appears to use a separate ground point. You could try connecting the 85 pin of the high beam relay to a separate ground.

[LLN260Z]

Hi GongZ,

Thank you for that, I will rip out the wiring and just check the output of each socket with a multimeter.

This was the second wiring method I tried using only one headlight socket. Same symptoms occurred so time to each one at a time.

[LLN260Z]

The wiring that worked for me. A guide if someone else gets stuck. 

[GongZ]

Glad to hear you sorted it out. What was the problem?

You might want to check your new diagram by the way.

It shows the high beam output from the original socket connected (yellow wire) to the ground connection (85) of the high beam relay.

It also show the low beam output from the original socket connected (green wire) to the trigger connections (86) of both relays.

[LLN260Z]

There were multiple issues which is hard to explain. When using a standard h4 globe, it did work similar to initial wiring diagram, but somewhere down the line, there was current going through the high beam indicator light. Made us trace each wire from the stalk and see the neg and positive. With how mine was wired, it worked for the LED headlights. Initially I did have the low and the high wire on light swapped, but then it wouldn't make sense with the indicator light turning on for low  beams and vice versa. We think the relay for the "pass" high beam was holding the high beam relay stopping it from turning off. It was just 5 hours of checking each wire if its negative or positive and ended up with this result. Only a guide for people with a 1977 260z 2+2 as I couldn't find much help in my case.

[GregTas]

Good effort sorting it. A little bit of thought needed to get the original negative switching to do positive switching on the new relays.

These relays are also suitable for the conversion.

 

 

 

Edited July 9, 2018 by GregTas

[GongZ]

I did not not realise that negative switching is used.

I have now found this topic which discusses fitting relays to 260Z headlights;

 

[GregTas]

If using a twin light relay it needs to have 6 pins, not 5.

Edited July 9, 2018 by GregTas

[RAP260]

Yea, I have one of the units installed that @GregTas posted. Was fitted by a previous owner. 

 

[LLN260Z]

I was aware of negative switching and did try multiple wiring methods. The main issue was the lights turning on but high beams not turning once they turn on. Thats when I started pulling my hair out. Also the initial wiring diagram i posted was supplied by the guy I bought the headlights off, he said suzuki and toyota sometimes use left loom for low beam and right loom for high beam. So ignore that in full. Started the car today turned the lights on, did not notice a huge drop in voltage like before, so pleased with that and much more light now.

[GregTas]

Yep good fix. Bright lights and your switches will last a lot longer.

[LLN260Z]