Need help turn signal issues
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Joined: Sep 2021
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Need help turn signal issues
When I would use the left turn signal it would make a buzzing sound. I replaced the flasher relay and then the relay would cycle constantly with nothing going. I then replaced the multi function switch and now it cycles properly but the left front signal is not working and the left rear will start working and then get weaker and then dies out. Wondering if anyone has has this problem or has a an idea what’s going on.
Last edited by teae7982; Sep 18, 2021 at 07:03 PM.
Veteran/Sheepdog
Joined: Feb 2012
Posts: 6,047
Likes: 110
From: Western AR
I'm thinking a bad connection somewhere in a plug or harness. First place I would check is up on the multi-function switch plugs. I had the wires pull out the back of my plugs after the plastic in the plugs got brittle and the pin retainer tabs broke off. This caused the wires to pull out the back of the plugs and short together/not make solid contact with pins in the switch.
More Turbo
Joined: May 2015
Posts: 633
Likes: 142
From: Staten Island, NY
I would start with checking all the bulbs in the signaling circuit to ensure they are working properly. Make sure that you don’t have any LED bulbs mixed in, they will cause the system to malfunction.LED bulbs require a separate flasher on our trucks to work properly. Good luck on your investigation 
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medicanic7
1987 - 1996 F150 & Larger F-Series Trucks
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Jul 14, 2021 05:35 AM
