turn signal no light (1 Viewer)

[2manycruisers]

After ignoring the wobbly intermittent ground in the front signals (77 FJ-40) for the past 6 years, I finally added ground wires to both front lights and voila! reliable turn signals. 4 days later my left signal quits altogether--no light, rather than blink or steady-on. Aside from the ground wire, I didn't change anything, but one of the 2 front blinker bulbs is bad (and has been for years). Right signal and hazards still work fine. I'm not sure what it could be besides the flasher--all the bulbs work (except the aforementioned bad bulb) with the hazards on. The right signal works, tho, so I'm not sure if it could/would be the flasher, either. Or maybe the switch itself?

I searched the turn signal threads and all the "my signal doesn't work" threads were about a light that came on but didn't blink, not one that didn't come on at all. 'Preciate any help.

 

[bsmith123]

link

Electrical


Try this it might help

 

[Coolerman]

It's not the flasher. If it blinks one side it's good. Replace that one bulb and try again. The old style flasher has to have at least a .7 amp draw in order for it to work properly.

You neglected to mention if you also cleaned up the rear lights? They also could use the separate ground wire to the housing. One of the few wiring mistakes Toyota made...

 

[2manycruisers]

I have not done anything to the rear lights. They do all flash on hazard, not sure of the voltage needs difference in hazard v turn signal though.

Driving it today, the left signal worked once, then not again. Seems like when the ground is the issue, they light up, but don't flash. I don't get any light at all. I put my hand on the flasher and could feel it click with right signal but nothing with left signal.

 

[Vicm]

I have not done anything to the rear lights. They do all flash on hazard, not sure of the voltage needs difference in hazard v turn signal though.

Driving it today, the left signal worked once, then not again. Seems like when the ground is the issue, they light up, but don't flash. I don't get any light at all. I put my hand on the flasher and could feel it click with right signal but nothing with left signal.

What do you mean " bad bulb" and do you mean all lights are working when you pull the Haz??
If so, you can count on it being a bad signal switch or bad connection in the LHS ( leads) not a grounding issue.
You can test the switch ,just to see if it is your problem.
If it is not ,take the haz switch out and get the cntacts inside cleaned.
The flasher won't do anything unless current passes through it, which means a break in the lead connection somewhere between the flasher and the failing lights.

 

[Pin_Head]

If both left bulbs don't light when the turn signal switch is on and they light up with the hazard, this indicates that the bulbs and their circuits after the switch are good. Since the right turn signals work, this means that the circuit upstream of the switch is good. All this points to the left switch contacts as the culprit.

 

[2manycruisers]

that's what I'm thinking. one of the left front bulbs (side) never lights--the filament is busted. But the front left and rear left bulbs light and flash with the hazards. none of them light with the signal. I'll have to check it this weekend.

If both left bulbs don't light when the turn signal switch is on and they light up with the hazard, this indicates that the bulbs and their circuits after the switch are good. Since the right turn signals work, this means that the circuit upstream of the switch is good. All this points to the left switch contacts as the culprit.