Intermittent Fast blinker

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Nov 21, 2018 | 04:06 PM

ChuckBTN

Thread Starter

Freshman User

Joined: Nov 2017

Posts: 42

Likes: 3

Intermittent Fast blinker

So I've got this intermittent fast blinker that's just started.. I've only noticed on the left turns. It appears that my signals are operating correctly during this.

But I will start with normal cadence then it will speed up for about 3 or 4 seconds then go back to the normal cadence.

No trailer hooked up.

Any ideas?

17 F350 6.7 SRW KR

Thanks,
Chuck

Nov 21, 2018 | 05:08 PM

RONMCHUGH

Romcjr

Joined: Jul 2008

Posts: 788

Likes: 40

From: Waller,TX.

Let us know if you come up with something . Curious …..

Nov 21, 2018 | 05:20 PM

ecoboost12

Elder User

Joined: Jun 2012

Posts: 528

Likes: 3

From: Rochester,NY

Hi, Possible bad ground or a Bulb, Check your running lights on left side.

Nov 21, 2018 | 05:40 PM

seville009

Logistics Pro

Joined: Nov 2004

Posts: 4,795

Likes: 47

When you say the signals are operating properly, do you mean that you checked each bulb with the blinkers on (not the 4way flashers)?

Nov 21, 2018 | 05:54 PM

mhoefer

Postmaster

Joined: Jan 2005

Posts: 4,424

Likes: 12

From: BC Canada

Have you done any wiring mods to those curcuits? Are you getting a dash warning for any bulbs out that are also intermittent? When I had a trailer tail light out, I even got a warning and the faster blinking on that side. Is there something conducting in your trailer plugs, in the box, on the bumper....

Nov 21, 2018 | 08:18 PM

srkr

Cargo Master

Joined: Jul 2008

Posts: 2,787

Likes: 658

Bulb is out on rear.

Nov 22, 2018 | 07:34 AM

rwilimo

Fleet Mechanic

Joined: Aug 2005

Posts: 1,339

Likes: 5

From: NJ

First start with verifying that both the front and rear bulbs are working properly when you are having the problem, if they are infact good and being that it is a 2017 I would check the problem connectors at the rear of the truck on both sides for water entry. Although most people only talk about the connectors on the left the right can also have the same problem. If you find water and presuming you are still under warranty have the dealer install the updated wire harness. If you just clean and dielectric it will come back down the road.