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Turn signal problems

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Old Apr 17, 2024 | 02:42 PM
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Default Turn signal problems

Hi all,

on my 99 the right rear turn signal is not working. The flashers and running lights work fine, and at first the signal was hyperflashing when it didn’t work so I installed a hyper flash bypass but it still doesn’t work although it flashes at normal speed now. So my question is now that I have the bypass installed why is the turn signal still not working? Is it the MFS or the hazard switch?
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Old Apr 17, 2024 | 03:10 PM
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Everything else works its not the bulbs buddy it’s something electrical

Last edited by Vetteman Jack; Apr 18, 2024 at 10:24 AM.
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Old Apr 17, 2024 | 03:22 PM
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How can it be the bulbs if the hazard work fine? Do they not use the exact same bulb?

Last edited by Vetteman Jack; Apr 18, 2024 at 10:22 AM.
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Old Apr 17, 2024 | 03:27 PM
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I have a bypass installed so the hazard switch is not the problem.

Last edited by Vetteman Jack; Apr 18, 2024 at 10:19 AM.
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Old Apr 17, 2024 | 03:32 PM
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car is literally bone stock other than the hyperflash bypass and an lmc5

Last edited by Vetteman Jack; Apr 18, 2024 at 10:20 AM.
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Old Apr 18, 2024 | 05:15 AM
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Originally Posted by corvette_nick84
Hi all,

on my 99 the right rear turn signal is not working. The flashers and running lights work fine, and at first the signal was hyperflashing when it didn’t work so I installed a hyper flash bypass but it still doesn’t work although it flashes at normal speed now. So my question is now that I have the bypass installed why is the turn signal still not working? Is it the MFS or the hazard switch?
Howdy! I test, repair, and sell MFS on eBay. If only one side is affected, it’s likely not the hazard switch. As stated, it could be a bulb or socket… sometimes the bulbs need to be seated just right in each socket. Beyond that, here is the rats nest schematic; PM me if I might be able to help!






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Old Apr 18, 2024 | 10:28 AM
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I have cleaned up this thread and removed posts or portions thereof that violate forum rules. Going forward, please cease with personal attacks and the bickering back and forth. If it continues, further actions may be required. Here is the rule that governs how forum members should interact with each other:

https://www.corvetteforum.com/forums...rd-others.html
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Old Apr 18, 2024 | 11:08 AM
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If the bulbs and sockets are ok, I’d guess the MFS… but that’s a rare failure mode for them and they can be pricey. I am happy to test it before you commit to buying anything
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Old Apr 18, 2024 | 06:41 PM
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Originally Posted by corvette_nick84
Everything else works its not the bulbs buddy it’s something electrical
If you want to rule out the bulb 100% just swap it with the left side, see if the problem moves with the bulb.
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Old Apr 19, 2024 | 05:52 PM
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Originally Posted by CorvetteHeadz
oem is discontinued. All that is left are cheap China MFS
Fortunately we have vendors who can test and repair used OEM’s.
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