Problems with headlights and signal lights

[inaminit]

57 at the light switch goes to 86 at the relay in the second position, or all the time?

[SpyderMike]

In the second position. It is energizing the changeover relay constantly when the lights are on...that is why hi/lo isn't working. It isn't being triggered based on turn signal switch hi/lo selection.

We proved this by modding a relay as described above.

To me the relay should be triggered from the light switch hi/lo switch (yellow wire at 56 on turn signal switch).

Anyway, not sure how the changeover relay issue relates to the turn signal relay as per schematic only the grounds are common. That is why he was cleaning up dirty grounds. He cleaned up grounds and put in a new turn signal relay but didn't indicate if this solved the issue for the relay he removed (old turn signal relay).

Mike

[inaminit]

Mike-In the parking light position, relay should be closed. in the 2nd (all the way out) the relay s/b open? y/n ? I am starting to think its either the hi/lo switch or the light switch, but testing should indicate if so.

[inaminit]

Mike-if you look at post 40, low position, Steve found voltage at both 87 and 87a. That should not be so-56b only should be hot. Does this indicate a fault it the hi/lo switch? I am heading out for a while but will check back later.

[SpyderMike]

inaminit,

You must be referring to another post. Post 40 he is sending an email address.

Anyway, previous we had the Hi/Lo working and we understood why. We proved that it wasn't the switch that was at fault (for Hi/Lo switching). Then Steve tried the turn signals and they didn't work. He bought two new relays and replaced them both. The only wiring connecting the two is a daisy chained ground which later he measured to be 5 ohms to ground. I suggested he clean this as the relays need a good ground. He had dirty grounds and cleaned them. I am now suggesting that he replace the new changeover with the modded old relay and report findings. That could be a significant clue.

By cleaning the grounds and replacing the two relays, he is changing three variables; I am suggesting that changing only one variable at a time would help this diagnosis.

Have you reviewed the 1972 schematic for hi/lo and turn signal wiring? If not, then I can forward it to you.

[inaminit]

Hello Mike
I have the 72 diagram in color, so I am all set there. I have no time this am, but I will go back and read through all the posts tonight. As I said earlier, I suspect the hi/lo switch, and the turn signal wires do pass through that switch, so there may be some kind of fault there. If Steve is interested, I can bring home a couple of used hi/lo dimmer switches tonight and can send him one to try, then return.

[SpyderMike]

Now that sounds like a nice offering!

Please review that schematic. How you read the hi/lo switching circuit portion. In your estimation, what triggers the hi/lo changeover relay?

Mike

[sballard]

I really appreciate the effort and the help. Sorry for jumping ahead. Hope the breakdown in post #139 was helpful.

inamininit: Thanks for offering a hi/lo dimmer switch. If you are talking about the dimmer switches on the steering column, I have a new one that I bought from Pelican a few weeks back that I can use if necessary. Hopefully the wiring is compatible with my '72.

[SpyderMike]

Steve,

Post 139 shows things work as expected. Without too much hassle, can you try what I suggested in 140 and report?

Mike

[sballard]

Sorry SpyderMike. I got confused.


I think this is what you wanted:

With the headlight flasher changeover relay removed....

1) "old" direction warning blinker indicator relay installed - No bright lights, No turn signals

2) "new" direction warning blinker indicator relay installed - Turn signals and emergency
flasher work but no bright lights

[SpyderMike]

Now place the old modded headlight flasher changeover relay in and please report the same.

[sballard]

THEY WORK!!!!!!!!! You ARE the man, SpyderMike!!!!!!

With the "new" direction warning blinker indicator and the "modded" headlight flasher changeover relay I've got high and low beams AND turn signals!

With the "old" direction warning blinker indicator relay and the "modded" headlight flasher changeover relay, I have high and low beams but no turn signals.

I can't thank you guys enough for your advice, especially SpyderMike who nailed it.

[SpyderMike]

Congrats!

So Steve, in retrospect, here is my theory:

We solved the Hi/Lo switching with the modded relay. The failed turn signal flasher could have been related to the dirty grounds killing the other turn signal relay. Your new relay fixed that issue.

Coincidence? Time will tell.

Keep us posted if either has issues down the road please.

[inaminit]

Whew! What a journey! Enjoy...