[6pack] Two Issues

Tue Feb 1 09:11:04 MST 2022

Electrical issues can be frustratingly fun. That hazard switch is a bugger.  I may be restating the obvious, but just in case...(I believe I'm reading the schematic correctly, but someone will correct me if not.)  12V has to come in from the hazard flasher, already flashing, on the LG/K (light green / pink stripe) wire, and when the switch is pulled out, it sends 12V to the Green/Red to flash the left-side bulbs and also to the Green/White to flash the right-side bulbs. This action also removes the 12V from being sent from the Green wire thru to the LG/S (light green/slate) wire which connects to the steering column directional switch. Thus, when you have the hazard pulled out, the turn signal circuit has no power, causing no problem if you have the turn signal switch up or down.

The hazards are on the Purple (always on) circuit. The turn signals are on the Green (on with the key switch) circuit.

When the switch is pushed in, the 12V from Green is passed out the LG/S to the Turn Signal Flasher, then to the steering column turn signal switch and then down either the Green/Red side or Green/White side.

So, two totally different things going on in this one little bugger of a switch. For the hazards to work, you need voltage getting to the hazard flasher on the purple wire, and making it to the switch on the light-green/pink wire. This blinking juice must make it thru the switch to both the G/R side and G/W side. For the signals to work, voltage must enter thru the Green wire and exit the Light-green/Slate wire, making it thru the flasher to the column switch and down the respective G/R or G/W side.

Easy huh? On my brother's 73, I've had that little bugger completely disassembled, soldered wires, cleaned brass contacts, but eventually only a new switch fixed it. It would work for 3 weeks and then nothing again.  Turn signals always worked. It was the hazard that always went out.

A car with turn signals working only on one side sounds like the steering column switch to me. It could be the ground at the bulbs, but strange that front and rear on one side would have the problem, which points me to the turn signal switch.

Sloane
69-Six
72-Spit

________________________________
From: 6pack <6pack-bounces at autox.team.net> on behalf of DAVID MASSEY <dave1massey at cs.com>
Sent: Saturday, January 29, 2022 1:38 PM
To: bobfabie at gmail.com <bobfabie at gmail.com>
Cc: 6pack at autox.team.net <6pack at autox.team.net>
Subject: Re: [6pack] Two Issues

OK.  No turn signals at all may be the hazard switch.  The hazard switch disconnects the turn signal flasher.  If those contacts are dodgy the turn signals won't work.  If the contacts for the right side are dodgy they won't work in the hazard mode.  I'd start there.

Dave

-----Original Message-----
From: rmf3860 rmf3860 <bobfabie at gmail.com>
To: DAVID MASSEY <dave1massey at cs.com>
Cc: 6pack at autox.team.net <6pack at autox.team.net>
Sent: Fri, Jan 28, 2022 6:11 pm
Subject: Re: [6pack] Two Issues

Dave,

Thank you for taking the time to respond. As you suggested, I metered out the green wires and found the one that was producing 12 volts. When I connected it to the one of the wires in the harness connected to the trans back up lights, THEY WORKED!

The two remaining issuers are: no turn signals, period. Hazards only flash on he driver’s side. (Earlier I stated that I only had turn signals on the drivers side, but I was mistaken). A new turn signal module and hazard module should arrive this weekend. Please share any other thoughts as to the cause(s) of these issues.

Thanks again for your help.

Bob Fabie

On Fri, Jan 28, 2022 at 7:53 AM DAVID MASSEY <dave1massey at cs.com<mailto:dave1massey at cs.com>> wrote:
[X]
Here is a screen shot of the wiring to the transmission From Dan Master's handy wiring diagrams.  As you can see, there is a green wire (fused 12 volts) to the switch and a Green/Brown wire which feeds power from the switch to the lights.  The Green wire should be hot anytime the key is on.  The fuse that feeds it also feeds power to the heater fan, wipers, gauges, turn signals so if they work you are probably good.

Turn signals: are both lights not working or is it just one?  If one bulb is not lighting up the other bulb will not draw enough current to cause the flasher to flash.

On the other hand, it might just be the bulbs or bulb sockets.  The sockets are notoriously unreliable, especially when they get old.  The ground connection is the usual suspect.  Start there.  If you have a volt meter check for voltage on the wires where they plug onto the sockets.

Dave

-----Original Message-----
From: rmf3860 rmf3860 <bobfabie at gmail.com<mailto:bobfabie at gmail.com>>
To: 6pack at autox.team.net<mailto:6pack at autox.team.net> <6pack at autox.team.net<mailto:6pack at autox.team.net>>
Sent: Thu, Jan 27, 2022 9:09 pm
Subject: [6pack] Two Issues

Hello All,

As you may know from my earlier post, by TR6 is alive and running beautifully following an extensive engine rebuild that ended up taking a few years, rather than the few months I had envisioned. Life and other important things interfered. Imagine that…

I’m now finishing up the final details and have encountered two issues, probably unrelated, that I need your help in diagnosing.

First: Only my left turn signal works and the hazard light doesn’t work at all.

Second: The back-up lights don’t work. I’ve installed a new back up light harness. I’ve tried to study the wiring diagram but can’t quite figure out how the 3 wires connect to the main harness’ 3 bullet connectors in the passenger foot well area. I can see that two of the new harness wires are solid green and the other has a ?red? thread. The main harness wires are almost impossible to discern which are solid and which has a different color thread.

Can anyone help me sort out these issues?

Thanks.
Bob Fabie
Fredericksburg, VA

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