924Board.org

[MikeJinCO]

A long war of mine. With the ignition ON the turn signal light has a dull glow and the relay makes a not very loud buzz. The turn signals and hazards function as they should. So I unplugged the connector at the steering column for the turn signal switch and I still have the light and noise. I have tried two relays one Wherle the other generic and they both act the same

Would this be a grounding problem or should I go looking for some kind of short in whatever plug goes in the relay/fuse board? Any other suggestions?
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Mike


'67 MG Midget Dp
'71 Ocelot Dsr Kawasaki 1000(under rebuild)

[jason c]

You have a short somewhere. Does the light go out when the fuse and/or the relay is pulled?

[MikeJinCO]

Yes, the buzzer and light go out if fuse pulled. I also don't have my oil pressure light which is tied into that circutry on a '77. I've drawn up the complete circuit, so I've gt some places to start checking.
_________________
Mike


'67 MG Midget Dp
'71 Ocelot Dsr Kawasaki 1000(under rebuild)

[MikeJinCO]

Sorry relay pulled.
_________________
Mike


'67 MG Midget Dp
'71 Ocelot Dsr Kawasaki 1000(under rebuild)

[jason c]

If it does it when the relay is pulled, pull the relay and check for shorts. Do you have a factory wiring diagram?

[MikeJinCO]

Yes Ihave the Haynes and will work on it ASAP. Thanks
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Mike


'67 MG Midget Dp
'71 Ocelot Dsr Kawasaki 1000(under rebuild)

[larchie]

I'm looking at a 1978 current flow diagram in the factory manual which seems to match-up O.K. with the the 1977 1/2 -- 1978 current flow diagrams in Hanes, but not so much the 1976 -- 1977 1/2.

[MikeJinCO]

Yes I'm using the 76-77-1/2 in Haynes and I have a lack of electrial function in much of the dash. I just drew out the turn signal switch and all its related stuff and got to the oil pressure light and said "oops, guess what I found" basically columns 57,61 and 70 of the diagram. It may go other places I just haven't looked that far yet.
_________________
Mike


'67 MG Midget Dp
'71 Ocelot Dsr Kawasaki 1000(under rebuild)

[larchie]

Just to find out what you've checked and to eliminate some parts of the circuit in order to find the (possible) short jason c suspects and ignoring the (possible) short for the moment, I have three questions ...

(1) Assuming both relays are good, the buzzing might indicate too little voltage getting to terminal 49 because of a poor connection, Are you getting around 11.5V or so to the flasher relay (terminal 49)?

(2) And next to check to see if the relay(s) might have been damaged while testing (damage which also could also theoretically be a cause of buzzing) ...


(a) Resistance between terminals 49a and 49, and resistance between 49a and 31 should be infinite.
(b) Resistance between terminals 49 and 31 (ground) should be several K-ohms


Are your resistances on your flasher relay similar? If so, they should be good.

(3) Finally, there's a quick test for the relevant part of the flasher switch itself. With the ignition off and with the turn-signal connector to the turn-signal switch at the steering column unplugged, infinite resistance should be seen between terminal 49a on the fuse board and terminal 31 on the flasher switch. Hopefully you can get to the latter without too much trouble. If there's not infinite resistance then this would be a likely explanation for the dull glow of the turn signal light because of a leakage of current through the flasher switch, if I understand your original post correctly.

If all these checks find no fault, then further troubleshooting will depend upon whether the car's wiring fits the pre- or post 77 1/2 model current-flow diagrams in Hanes. I have only double-checked this post, so hopefully it makes enough sense so that you can easily verify the circuit diagrams to make sure I didn't make any typos.

[larchie]

Edit 05.27.2014: The following post mistakes E-6 and E-6 so should be safely ignored. The current diagram might still be useful for future reference in this thread so long as the highlighting and "analysis" are also ignored.
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[jason c]

The resistor limits voltage to the instrument lights so too much voltage doesn't destroy the lights.
Mike, do you have any aftermarket alarm or cobbled wiring? Are all the turn lights glowing or just one? You refer to it as "the turn signal light".

[MikeJinCO]

Thanks for pointing out that resistor. While you all were writing I was checking it out as I had no power to the oil pressure indicator light(the bl/gr wire on line 31) and looking back upstream the hazard flasher switch came next. The resistor is soldered to the hazard switch and is open. That should be the problem.

I haven't found much cobbled together wiring or alarm stuff. I' guess its time to look for the hazard flasher switch. We also have a guy who repairs TV's and such in town-a real person still does that- as a fall back. The resistor has standard color code markings so it should be replaceable.

You guys are really good with this electrical stuff. Thanks. I'll go back to playing with my cylinder heads .
_________________
Mike


'67 MG Midget Dp
'71 Ocelot Dsr Kawasaki 1000(under rebuild)

[larchie]

[jason c]

I was getting confused again Larchie. (inside joke). I'm afraid to hear what ideas you'll think of at the proctologist's office.

I was asking about the alarm because years ago I put an alarm in one of my early 44's. The alarm which was hooked into the turn lights and horn caused a back feed. Every time I turned my turn signal on the "fasten seatbelt" light came on. Lol.
It was appropriate though because I'm a track junkie and drive that way.

Mike, an electronic store (radio shack) should have the resistor. The size, stripes and colors are the identifiers.

[MikeJinCO]

I pulled the switch out after making a diagram. I was trying to test it with the wiring hooked up. The resistor tests out ok at 320 ohms(should be 330+-10%). However I do not get continuity from any of the terminals to the output line. I found a new switch on ebay.
_________________
Mike


'67 MG Midget Dp
'71 Ocelot Dsr Kawasaki 1000(under rebuild)