Turn signals and hazards don't blink

Check the 10A HAZ and 10A GAUGE fuses.

I understand the lights at each corner of the vehicle do not blink, but can be turned on solid. How about the instrument panel, does that show the flashing turn signals when activated?

 

Yes, the 10A GAUGE fuse is in the fuse box under the instrument panel, driver's side.

If that fuse is good, then you will need a digital multimeter and access to the electrical wiring diagram to figure out whether the flasher relay is working correctly.

What fuse did you previously replace, as described in your OP?

 

Since you have the diagram of the circuit, you can turn on the hazard switch, and see whether pulsing 12V is present at the flasher relay terminals 2 and 3; or not.

Use your ohmmeter to verify continuity of the old fuse.

 

Then see if you have 12V coming into pins 1 and 4 of the flasher relay. Also verify that pin 7 is connected to body ground.

If you have voltage at the input of the relay, and the relay is making switching noises, but you don't get pulsing voltage at pins 2 and 3, that would imply the relay is not working.

 

"Testing at the flasher relay connection had the following result: pin 1 connector showed around 14 volts, pin 4 connector showed no power at all."
Check the 10A HAZ fuse again. That provides power to pin 4.

If the HAZ fuse has blown, before you replace it, measure the resistance from pin 4 to ground. If the resistance is very low, then replace the flasher relay assembly, then replace the HAZ fuse and see if the lights work.

The GAUGE fuse supplies many circuits, which is why the red triangle master warning light came on, when the fuse was removed.

 

Replace the fuse according to the markings on the box. Just make sure that the 15A marking corresponds to HAZ and not some other fuse, such as DOME.

 

similar problem...

I have no 12V coming into pin 4 of the flasher relay, the fuse was replaced....no change......pin 1 shows 12v fine

can the hazard switch cause this?

 

The 10A HAZ fuse is the fuse in question. Pull the fuse and measure resistance across it to make sure the fuse is good. Do not rely upon visual inspection.

Also, use your voltmeter to measure voltage from body ground to the terminals of that fuse. You should be able to measure 12V from one terminal to body ground.

If you measure voltage at one terminal of the fuse socket, then insert a good fuse and you do not measure voltage at pin 4 of the flasher relay, then obviously something is wrong with the wiring harness between the fuse box and the flasher relay.

The hazard switch will ground pin 17 of the flasher relay when it operates. It has no effect on the voltage on pin 4.

 

thank you so much! looks like it may be the wiring harness after all, how odd for the signal lights/hazards to just stop working 1 minute when it was fine before.............I wonder how the original poster solved his problem?!!

 

I just noticed you have a G3 model. Pin 8 of the flasher relay is grounded by the hazard switch.

You could temporarily provide another source of 12V power to pin 4 of the flasher relay, to confirm that the system will work once power is available to that pin. Then, you could run a permanent wire to the relay once you've decided that you can't find a fault in the fuse or the wiring harness upstream from the flasher relay.

 

I have very similar problem that occurred after unsuccessful installation if led flasher relay. Two pins of relay got pushed against each other, inside of relay and that caused some reaction. As a result I have no indication or hazard lights.
Both fuses are not blown, installing original Toyota relay (tried two of them) - didn't bring any results.
Patrick, Thank you for good ideas, where to look at.
Now need to find out which pin of relay corresponds to which number ..
Will share the results as well ..

 

Cheeked all circuits agan and again, but it was just fuse under the bonnet. That fuse appeared to be good (closed circuit) when checked with multimeter, WHILE IN PLACE. Visually looked good, but I never checked it with multimeter when pulled out of a circuit. That was the cause.