Turn signal- fast blink, normal hazard

Maybe a bad ground somewhere, have you checked voltage? The stud under the dash with multiple ground wires is quite notorious for being the culprit of bad grounding.

what bulbs do you use ?

I am using regular incandescent 1157 in front and single filament incandescent bulbs in back. In the speedo it is the stock 2w incandescent.

I will check the ground under the dash and at the fixtures too.  I've already used dielectric grease on the nylon connectors at the hazard switch and at each of the fixtures.

are you for sure you mount the bulbs in front on the right way ?

from what time you have a fast turn signal ?

Simon

It is normal speed when hazard switch is used and fast when the turn signal indicator is used.

That is the great puzzle!

from what I know the hazard has always a normal speed, even when one of the  bulbs is removed.

thinkin the front the parking light 5-10 w is blinking by using the turn signal.

and the 21w burns when the parking lights are on

Have you a single 21 w bulb in the taillights?

yes, single bulb in the rear behind the yellow indicator lens

18 or 21 W ?

Hi the bulbs in back are Philips 12498B2

that is a 21w bulb on the taillight indicators

@CPM posted:

that is a 21w bulb on the taillight indicators

That is OK , and  when into the front the wiring and bulbs are mounted as must be , try an other blinker relay .

But this  isseu happens me also once , and I notice that the wiring on the front parking /turnsignal are  switched .

to be sure check the front bulbs again , and check  the wiring if they are on the right way connected and if like Julian say there is bad ground .

Also try this, parking lights on, ignition switch on and push the brake pedal (brake light), turn indicator on .

and look if all lamps are flashing  

Simon

I had the same issue with my front driver's side turn signal.  I replaced the bulbs, it would be normal for a moment or two and then as soon as I got back into the car it would go to double speed.  The contact aparently was not very good, we cleaned and bent it forward a bit and seems to be working.  Now, I have no rear brake lights which we think we've isolated to a new brake switch which is going on this week.

When the brake lights are on and either blinker is on (still fast flash), there is a slight flickering of the brake light, which really seems like a ground problem.  I cleaned the grounds at both tail lights to no avail.   Might still be somewhere else.

Someone mentioned a nylon multiplex plug in somewhere near the coolant tanks might be worth checking.  I'm not seeing that plug.  Is it visible from under the car?

I'm running out of ground ideas.  Again, this is NOT happening with the hazard, which operates at normal click speed.

The plug is a big red square plug, on the passenger side, IIRC  It joins the smaller harness to the rear of the car to the main engine bay harness.

My pen is pointing at it in the two attached pictures.

IIRC - isn't there some terminal "eyes" on each of the taillight buckets?  I am sure you have checked those as well?

It still sounds crazy that the Turn Signal and Hazard Flasher behave differently...  maybe the circuits ground differently.

Hope this is helpful.

Rocky

Here's the circuit, if you don't have it. 

The only difference I see in Emergency vs. Turn Signal is the fact that the Emergency Flasher Light grounds to chassis at "31".

Does the light in the Tach blink?

@CPM posted:

When the brake lights are on and either blinker is on (still fast flash), there is a slight flickering of the brake light, which really seems like a ground problem.  I cleaned the grounds at both tail lights to no avail.   Might still be somewhere else.

very slightly flickering is OK into this situation.

Rocky - thank you much.  Yes, I did have the circuit from that other website (great website).  My car also has the Pantera Elec ATO fusepanel replacement which is really nice and was well installed (I think!) by others before me.  Thank you too for the illustration and location of the multiplug. - I'll look for it from the topside and hoping that squeezing connectors and dialectric grease may help, which it has already on some other plugs behind the dash.

Yes, I did ensure I have good grounds now for the rings on both tails - no impact yet.

Simon - thank you as well.

Again, the puzzler for me is how the Haz can work fine while the blinker is fast on both sides.  the flasher itself is the same for both (its the pink wire output).

I haven't yet gotten to the below dash ground.  That and the plug on the pass side in the engine compartment are my next.

@rocky posted:

It still sounds crazy that the Turn Signal and Hazard Flasher behave differently...  maybe the circuits ground differently.

from what I remember the hazard flasher Always works slow , even when one or all the bulbs are out of the lighthousings .

still thinking the problem is into the front parking/turn lights.

other wise try to replace the black flasherbox