High beam headlights only

[denniswagnerusa]

I have two issues that started recently with my 69 1600. All the electrical worked normally until recently when the headlights would only be in high beam mode. The dash light went on also. I also lost the rear lights only when the headlights were on however the turn signals worked normally. The front parking lights also do not work with the headlights on. Everything else seems to work.

This problem is the result of an evolution of other problems. It started with a stuck oil filter. While working with that I crossed some wires on my electric fan controller and shorted it out starting a small fire which I was able to blow out. After that the fan was on all the time. I drove it for awhile until the new controller came in. I replaced the fan controller but it kept blowing fuses. I found out that I had wired it incorrectly and it worked fine after switching a couple of wires. Somewhere in there I drove the car at night for the first time in a long time and noticed that the right turn signal did not work when the headlights were on. I inspected the wiring including pulling the light switch down to see if there was any obvious problems and there weren't. Anyway something I did caused the turn signals to start working again but now the high beams are on all the time and the rear lights don't work with the headlights on.

I've studied the discussions in this forum about this problem and have done what I could to check grounds and look for loose wires. Troubleshooting the headlight relay on this car is tough because the spade connectors are encased in plastic connectors.

Any ideas on how to continue?

[SLOroadster]

Pull the headlight relay and see if there is a broken wire going into it. Highbeam is the open setting when the wire breaks. I've had a similar issue with mine and every time its been the wire from the plug going into the relay.

Will

[Nissanman]

Here is a line schematic of that area of the wiring: -

1965 SP310 Head Light Schematic.jpg

It is for a 1965 SP310 but applicable to all I believe

[denniswagnerusa]

My problems have been partially solved. I found a fuse I didn't know existed next to the fuse box. My electrical system is a hybrid because of the need to merge the stock electrical system with the SR20 system. My mechanic put in several relays with the one in the glove box protected by a 25 amp fuse. The fuse was burned out causing most of my problems. By replacing the fuse my hi and low beams worked normally is did the tail lights and parking lights with the headlights on. However now I'm back to a problem I had earlier where the right turn signals front and back do not work only when the headlights are on. They work normally when the headlights are off. Any ideas where to start troubleshooting this problem?

[denniswagnerusa]

Also now the low beams don't work but the hi-lo beam switch works to toggle between hi beams that work and low beams that do not. Before the high beams stayed on in both positions.

[MrGuts]

Have the same hi/lo beam issue. Have a new headlight switch, expect the issue to be in the stalk switch.

[Linda]

Here is an old thread on a repair option:
http://www.311s.org/phpBB3/viewtopic.ph ... tch#p79438
Linda