Turn signal comes on, does not blink.

Hello,

The truck is a M1120A4 LHS. The turn signal/hazards light have and come on, they do not blink. I have replaced the turn signal switch, the hazard light switch, the ground wire, and the high beam switch. There no other fuses tripped that I can tell and there is correct voltage going through the harness. What would keep it from blinking?

jgreen52888 said:

Hello,

The truck is a M1120A4 LHS. The turn signal/hazards light have and come on, they do not blink. I have replaced the turn signal switch, the hazard light switch, the ground wire, and the high beam switch. There no other fuses tripped that I can tell and there is correct voltage going through the harness. What would keep it from blinking?

Click to expand...

.
There should be a flasher - just like a normal truck.

TM 9-2320-279-24P
Page 88-1
PDF Page 282 and 283

GROUP 0608 MISCELLANEOUS ITEMS

Hopefully?

FIG.88 TURN SIGNAL SWITCH AND
FLASHER

II have the same issue, but we replaced the turn signal flasher relay and nothing happens. Is there another circuit breaker along the wiring harness that Iam missing?

I posted an early post. The headlights, 4ways, marker lights all work except the turn signals. What could it be?

Replaced with LED lights? Take the indicator bulb out of the turn signal switch and try it again.

On my M998 when I replaced my directional bulbs with Leds my blinkers no longer worked. The flasher needs more resistance than the Leds were giving. I put the incandescent bulbs in just the front and the blinkers worked fine. This may be your issue if you replaced the bulbs and then had a problem.

Mark

They can get finicky if the fluid gets low. Might want to check the level...

MarkM said:

On my M998 when I replaced my directional bulbs with Leds my blinkers no longer worked. The flasher needs more resistance than the Leds were giving. I put the incandescent bulbs in just the front and the blinkers worked fine. This may be your issue if you replaced the bulbs and then had a problem.

Mark

Click to expand...

It's how the TS switch is connected internally. Power comes in and then goes out to the .mil flasher. It then comes back to the TS switch. The indicator bulb is wired between the power going out and coming back giving you the effect of a 80s Chevy fender marker light blinking out of sequence. Incandescent bulbs
don't care, LEDs see voltage all the time and thus try to stay on.