I'll have to go with Ian here, I have standard bulbs in my front indicators and LED's in back. I still don't have the dash indicator lights. I'm moving this issue down a notch on the list, I know they work and that's all that's necessary.

Dave

 

Hmm interesting.
Incidentally, when the hazard lights are on, neither of the left or right internal indicator lights come on, you only get the red hazard warning indicator light in the central warning lamp cluster. This is because the green indixator lamps in the tacbo ajd speedo will have 12V both sides of the bulb during the on cycle of the hazard lights.

To answer a question earlier in the thread, yes it is standard to have 2 different bulb holder types for the 2 warning lamps.

it seems to me very unlikely that both those diodes in the harness would have failed. More likely to be a bad connection on one of the connectors from the flasher unit to the warning lights. I would get a multimeter next and check for on / off voltage at the flasher unit terminal to the warning lights and then at each of the bulb holders with the flashers on.

 

ok Andy T. the two different harnesses are Standard in the Series 3. Thanks for verifying.

But Ian says "No Dash Lights".
Are we talking Turn Signals Indicator lights or all the Gauge lights in Ian's car?

I have no LEDs anywhere in my car, so my symptom can't be related to LEDs.

I replaced the Diode at the Left Side ( tachometer ) harness, so it can't be the Diode.

I have replaced the Flasher relay twice, and checked the plug is well connected to the bottom of the flasher.

**I modified the outside turn signal side markers to flash, but the problem was there BEFORE I did the mod.

To repeat the symptom in my car:
when I am making a left turn, I set the Stalk switch down to indicate LEFT;
The green arrow indicator at the tachometer flashes two or three times and then stops illuminating the green arrow indicator.

This happens whether the car is moving or parked for troubleshooting.

After removing the bulb socket from the tachometer, I noticed it shows a loss of voltage, in other words, the bulb continues to flash but at a very low voltage, hardly enough to illuminate the green arrow indicator.

This Only happens at the Left side indicator.

 

Jose, When I said "dash lights" I am referring to the green indicator lights in the tach and speedo. Same green indicator issues as yours except on both l/h and r/h. Re the flashing side marker which I beleive I followed your link as to how to do the mod - thrilled. I think I had the same issue before the mod, but can't be 100% on that. I opened up the original Hella (TBB44) and it's electronic - ie. there is no bi-metal heating element. A bunch of resistors, three transistors and 2 capacitors. One 16V and the other 50V. The DAC 1731 (Moss motors) is also electronic - I opened it up also. I dont believe its the relays at all. Incandecents in the Green indicators show continuity. Meter shows no on/off voltages at those bulb sockets. Interestingly, with the l/h ind. bulb hanging from the tach, selecting a r/h turn now gives me a single blink on the r/h indicator!

 

If not done already.....

Whenever weird things like this happen my first instinct is the check grounds/earths just on general principles. In this case, ground G13 in the diagram a few postings back.

Not to mention the harness connectors behind the instruments. There are two or three of them.

No promises. Just tossing thoughts out.

Cheers
DD

 

Ian, in my car, the indicator issue was happening before I did the flashing side markers mod, so it couldn't be the culprit. And nothing has been affected after the mod, only improved in any case.

​​​​​​Doug, if it was a ground issue, I don't think the indicators would blink three times and then stop?
But I am suspecting the Flasher Relay as you suggested.

The weird thing is that if I turn ON the Hazard/Emergency switch, both indicators blink/flash normally, they don't stop. It only happens when the Stalk/Steering column switch is switched to Left Hand signal, that is why I also suspect the stalk switch.

 

TBH I agree.

But ensuring good grounds and connections is never a bad decision, IMO. Might fix the problem....and not hard to do....and free!





Maybe you can get some aerosol electric contact cleaner into the innards of the switch?

Cheers
DD

 

yes, I have spent time cleaning grounds all over, from the cylinder head to the body-engine strap, to even the hot terminals at the firewall including the interior side of those hot terminals hidden by the fan blower cases, only to find out the wiring rings were shiny clean, no oxidation.

Deoxit is a great product for cleaning electronic pots, but the Stalk Turn Signals and Wiper switches have grease inside, and any other solvent like WD40 might dissolve it and create a problem.

I have a new, factory sealed Bosch Flasher relay somewhere, will try it as soon as I find it !
​​​​​​

 

No don't do that. we have to find out what is causing this. There has to be an answer.

 

I came across this diagram on website durite.co.uk from a company making multiple different flasher units:


The text states that the caravam warning lamp on C2 will extinguish if a caravan lamp fails. So if a flasher unit of this type is being used in one of our cars without a caravan or trailer added, the warning lamps will not function. The flasher unit must somehow detect the total resistance of the set of lamps in use.

I am wondering if it is, after all, a flasher unit problem in these problem cases.

 

What is the "Caravan" ? I know what a Caravan is, but used in the flasher context I have no clue.

 

If you tow a trailer or caravan, you need to add more lamps. In that diagram from the website, below the dotted line they show left and right lamps for the caravan or trailer.

 

ok, thanks for.the info and the illustration. I'm going to source a new flasher relay to see if it is the problem.