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> left turn signal problems, feel like i have tried everything
jeff dodge
post Oct 10 2025, 04:37 PM
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I am having trouble with my left turn signal. Let me detail; ground tested and is good, replaced , replaced column switch, new relays, new bulbs, swapped housings from left to right, new fuses. noticed that when I clicked the emergency flashers it blew that fuse. Right works fine, the left turn filament is very dim and the read does not do anything. I have spent two weeks trying to track this down. I have built entire harnesses for vintage race cars and this has me baffled. Please help! Thanks, Jeff
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Ishley
post Oct 25 2025, 09:01 PM
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You might want to check all the bulbs and fixture. Front and rear. Pull the bulbs out and throughly clean the receptacle. Blow them out with compressed air. I had a little piece of rust get loose in there and fried a brake light switch. I figured it out after I installed a new one and could feel the switch getting hot. Sure enough that was the issue. You could have the same thing with a turn signal fixture. Simple to fix but drove me crazy for a while.
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jeff dodge
post Oct 30 2025, 10:22 AM
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QUOTE(Ishley @ Oct 25 2025, 10:01 PM) *

You might want to check all the bulbs and fixture. Front and rear. Pull the bulbs out and throughly clean the receptacle. Blow them out with compressed air. I had a little piece of rust get loose in there and fried a brake light switch. I figured it out after I installed a new one and could feel the switch getting hot. Sure enough that was the issue. You could have the same thing with a turn signal fixture. Simple to fix but drove me crazy for a while.

I will try and list the details of my findings;
1)all of the L/R light housings were tested with every bulb socket connected with jumper leads directly to the battery and every bulb socket functions properly.
2)when all 4 light housings connected the L/front turn comes on, but is very dim. The L /rear turn does not have power at the housing even though it checked out with a direct battery connection. Every other L/R light functions as it should.
3)all ground connections check out.
4)I have replaced every bulb, tried 2 new proper flasher relays, installed brand new column turn signal switch, installed brand new emergency flasher switch, I installed all new fuses.
5)I double and triple checked every wire connection and all are in the proper location.
6)keep in mind that the R/side turn signals work fine.
7)with all of these steps and new parts, it's the same results before I started to unravel this problem over 3 weeks ago!
Any thoughts with this information would be greatly appreciated. Jeff

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jeff dodge
post Oct 30 2025, 11:27 AM
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QUOTE(jeff dodge @ Oct 30 2025, 11:22 AM) *

QUOTE(Ishley @ Oct 25 2025, 10:01 PM) *

You might want to check all the bulbs and fixture. Front and rear. Pull the bulbs out and throughly clean the receptacle. Blow them out with compressed air. I had a little piece of rust get loose in there and fried a brake light switch. I figured it out after I installed a new one and could feel the switch getting hot. Sure enough that was the issue. You could have the same thing with a turn signal fixture. Simple to fix but drove me crazy for a while.

I will try and list the details of my findings;
1)all of the L/R light housings were tested with every bulb socket connected with jumper leads directly to the battery and every bulb socket functions properly.
2)when all 4 light housings connected the L/front turn comes on, but is very dim. The L /rear turn does not have power at the housing even though it checked out with a direct battery connection. Every other L/R light functions as it should.
3)all ground connections check out.
4)I have replaced every bulb, tried 2 new proper flasher relays, installed brand new column turn signal switch, installed brand new emergency flasher switch, I installed all new fuses.
5)I double and triple checked every wire connection and all are in the proper location.
6)keep in mind that the R/side turn signals work fine.
7)with all of these steps and new parts, it's the same results before I started to unravel this problem over 3 weeks ago!
Any thoughts with this information would be greatly appreciated. Jeff

I forgot to add that if you pull the emergency flasher switch the flasher relay pulsates and gets very warm almost immediately.
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Posts in this topic
jeff dodge   left turn signal problems   Oct 10 2025, 04:37 PM
jim_hoyland   There’s a possibility the TS switch has a short ...   Oct 10 2025, 06:33 PM
Dave_Darling   A dim light says to me that you've got either ...   Oct 11 2025, 01:49 AM
jeff dodge   A dim light says to me that you've got either...   Oct 12 2025, 10:28 AM
Spoke   I am having trouble with my left turn signal. Let...   Oct 12 2025, 06:21 PM
scallyk9   I am having trouble with my left turn signal. Le...   Oct 16 2025, 03:10 PM
jeff dodge   [quote name='Spoke' post='3227996' date='Oct 12 2...   Oct 17 2025, 11:46 AM
jeff dodge   [quote name='Spoke' post='3227996' date='Oct 12 ...   Oct 20 2025, 03:02 PM
jeff dodge   [quote name='jeff dodge' post='3228695' date='Oct...   Oct 21 2025, 04:13 PM
Spoke   All of the housings checked out. every light work...   Oct 22 2025, 06:01 AM
jeff dodge   All of the housings checked out. every light wor...   Oct 22 2025, 02:22 PM
jeff dodge   All of the housings checked out. every light wor...   Oct 23 2025, 04:39 PM
jeff dodge   [quote name='Spoke' post='3229355' date='Oct 22 2...   Oct 23 2025, 04:50 PM
NARP74   I had some stuff in my rear trunk hit the tail lig...   Oct 16 2025, 04:34 PM
Spoke   OK, let me make sure I understand what's hap...   Oct 23 2025, 07:53 PM
jeff dodge   OK, let me make sure I understand what's ha...   Oct 25 2025, 08:23 PM
jeff dodge   I appreciate all of the help that I am get from fo...   Oct 24 2025, 08:17 PM
Ishley   You might want to check all the bulbs and fixture....   Oct 25 2025, 09:01 PM
jeff dodge   You might want to check all the bulbs and fixture...   Oct 30 2025, 10:22 AM
jeff dodge   You might want to check all the bulbs and fixtur...   Oct 30 2025, 11:27 AM
Superhawk996   You’re going to have to work with a wiring diagr...   Oct 30 2025, 11:44 AM
black73   Are the rear license plate lights in that circuit?...   Oct 31 2025, 03:40 AM
jeff dodge   Are the rear license plate lights in that circuit...   Oct 31 2025, 09:42 AM
Spoke   It might be useful to check the resistance in the ...   Oct 31 2025, 10:02 AM
NARP74   @jeff dodge Did this ever get resolved? I am hav...   Jul 20 2026, 11:55 AM


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