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May 10, 2022 | 01:34 PM

dans 51 f2

Thread Starter

Cross-Country

Joined: Mar 2010

Posts: 85

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At Wits End

Front turn signal problem. Both front turn signal flash together whether turn on left or right. Rear signals work just fine. Ordered replacement Grote t/s housing(has replaceable switch minus wire harness) on column and same results. Ran a new wire from switch on column to lt t/s with same results. Any ideas?

May 10, 2022 | 01:45 PM

casetruck1

Mountain Pass

Joined: Jul 2020

Posts: 178

Likes: 44

It sounds like it is loosing ground somewhere if both are flashing. Could start checking that by touching wire to light housing and ground to see if it changes anything.

May 10, 2022 | 02:34 PM

truckeemtnfords

Logistics Pro

Joined: Nov 2006

Posts: 3,672

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From: Fallon,NV & Bainbridge OH

I second the bad ground statement. Verify there all wires are properly routed and not chafed or pinched with good ground connections.

May 11, 2022 | 08:55 AM

ron2565

Mountain Pass

Joined: May 2020

Posts: 114

Likes: 29

From: Bristol County Ma

I had same issue once and I did all kinds of things then I finally got around to check the ground and found two bad grounds.

May 11, 2022 | 04:12 PM

dans 51 f2

Thread Starter

Cross-Country

Joined: Mar 2010

Posts: 85

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Don’t they ground thru the mounting screws? If not, where is the ground wire?

May 11, 2022 | 04:20 PM

56panelford

FTE Legend

Joined: Oct 2005

Posts: 283,683

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From: northwestern Ontario

They do but rust , paint can interfere . Take a wire from the negative terminal from the battery and contact it to the lamp housing to check..I had the same issue and poor ground was the problem..

May 11, 2022 | 04:50 PM

CharlieLed

Lead Driver

Joined: Aug 2006

Posts: 8,093

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From: Brentwood, TN

Quite likely that the lights are miswired...parking lights are designed to illuminate on both sides simultaneously. If the wire for the parking lights is connected to the turn signals then there will be a problem.