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Old 03-19-2016, 07:31 PM
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chuck50
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Default reverse lights??

I have a c4 corvette 1984 71000 miles with manual tranny and no reverse lights . does ay one know if there is a switch on transmission or somewhere else?
Old 03-19-2016, 07:55 PM
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65GGvert
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Yes there is a switch on the transmission that should close when in reverse. There is also a fuse in the passenger side fuse panel. Sometimes a switch will short and blow the fuse, in which case you'd need both.
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Old 03-19-2016, 07:59 PM
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Default would you know where on the tranny?

Originally Posted by 65GGvert
Yes there is a switch on the transmission that should close when in reverse. There is also a fuse in the passenger side fuse panel. Sometimes a switch will short and blow the fuse, in which case you'd need both.
thank you for your response! would you know where it might be located on the transmission? tail bell housing?
Old 03-19-2016, 09:35 PM
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Did you check the fuse?
Don't know the exact location on 84, but the switch looks like this: Sorry wrong picture posted, this should be correct



Last edited by 65GGvert; 03-20-2016 at 08:05 AM.
Old 03-19-2016, 10:12 PM
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Originally Posted by 65GGvert
Did you check the fuse?
Don't know the exact location on 84, but the switch looks like this
^^^^

That's NOT a BU switch for a 4+ transmission.


This I believe is:

https://corvetteparts.com/item/switc...4-1988#details

Connector is pointed out in this snapshot of the FSM>

Name:  '84 BU (2).png
Views: 3545
Size:  717.7 KB

Last edited by WVZR-1; 03-19-2016 at 10:29 PM.
Old 03-19-2016, 11:25 PM
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The picture said specifically 84 4+3 Corvette. I looked up again and found several places that says this one is the correct one. I edited my earlier post.The picture above shows you where it is located so you can check your plug and connections. If you put the transmission in reverse with the plug disconnected you should read almost zero ohms between the two contacts on the transmission side where switch screws in. Again, check the fuse first.

Driver's side about center:







Last edited by 65GGvert; 03-20-2016 at 09:46 AM.
Old 03-20-2016, 07:19 AM
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Default OMG thhank you !!

Originally Posted by 65GGvert
The picture said specifically 84 4+3 Corvette. I looked up again and found several places that says this is the correct one. I edited my earlier post.The picture above shows you where it is located so you can check your plug and connections. If you put the transmission in reverse with the plug disconnected you should read almost zero ohms between the two contacts on the transmission side where switch screws in. Again, check the fuse first.

Driver's side about center:


Your the best!!!! I will check the fuse and again thank you for all your very helpful info!!!
Old 03-20-2016, 08:09 AM
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Originally Posted by 65GGvert
The picture said specifically 84 4+3 Corvette. I looked up again and found several places that says this is the correct one. I edited my earlier post.The picture above shows you where it is located so you can check your plug and connections. If you put the transmission in reverse with the plug disconnected you should read almost zero ohms between the two contacts on the transmission side where switch screws in. Again, check the fuse first.

Driver's side about center:

Well I can tell you that maybe you should give up "window shopping" or using "window shopping" images as references. Use any of your shopping sources and the correct GM # 14057528 and if they show your image I'd be interested to see it. It would be a vendor to very likely to avoid.

OP - the switch is very likely available at your "local" auto parts store using the information (GM part #) as a reference. Auto Zone or Oreilly potentially, NAPA very likely but theirs looks expensive maybe.

I can assure you the "link" I provided is correct for a visual image.

"65GGvert" - This is your first posted image, you only needed to mention a "ooops" (ZF Switch) and maybe post you new "best guess" along side what you insisted was correct. You've certainly done better the 2nd visit to a manufacturer using the part number I supplied or the SMP catalog.

Name:  ZF SWITCH.jpg
Views: 1530
Size:  30.4 KB

OP - most detent-ball operated switches usually become lazy/inoperable because of lack of use, I like to call it "exercise". Generally speaking if you have time just remove yours and soak it for some time in solvent and exercise the "ball" several times during the soak. You can confirm operation using a DMM after the soak/exercise operation. That was always our "first choice" for any detent-ball switch. I've never had a "soak/exercise" fail on a ZF switch.

Last edited by WVZR-1; 03-20-2016 at 09:38 AM.
Old 03-20-2016, 09:38 AM
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Originally Posted by WVZR-1
Well I can tell you that maybe you should give up "window shopping" or using "window shopping" images as references. Use any of your shopping sources and the correct GM # 14057528 and if they show your image I'd be interested to see it. It would be a vendor to very likely to avoid.

OP - the switch is very likely available at your "local" auto parts store using the information (GM part #) as a reference. Auto Zone or Oreilly potentially, NAPA very likely but theirs looks expensive maybe.

I can assure you the "link" I provided is correct for a visual image.

This is your first posted image, you only needed to mention a "ooops" (ZF Switch) and maybe post you new "best guess" along side what you insisted was correct. You've certainly done better the 2nd visit to a manufacturer using the part number I supplied or the SMP catalog.

Attachment 47964896

OP - most detent-ball operated switches usually become lazy/inoperable because of lack of use, I like to call it "exercise". Generally speaking if you have time just remove yours and soak it for some time in solvent and exercise the "ball" several times during the soak. You can confirm operation using a DMM after the soak/exercise operation. That was always our "first choice" for any detent-ball switch. I've never had a "soak/exercise" fail on a ZF switch.

I didn't use anything of yours, I merely posted the wrong picture first and corrected it. The difference in my post and yours is I was trying to help the guy find his reverse light switch, while you are trying successfully to be a jerk.

Last edited by 65GGvert; 03-20-2016 at 12:51 PM.
Old 03-20-2016, 09:58 AM
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Originally Posted by chuck50
Your the best!!!! I will check the fuse and again thank you for all your very helpful info!!!
I don't have an 84, but it appears from research that the turn signal and b/u lights are on the same fuse, so if turns work it won't be the problem. In case anybody asks, the following picture is not from my personal pictures, but is represented as an 84:


Old 03-20-2016, 08:46 PM
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It was only a couple more snapshots so I thought I'd just finish this:

"65GGvert" posted an incorrect image but here's the FUSE BOX, the wiring diagram and the diagnostics. His mention of "if you have directional that work it's NOT the fuse is correct".

Name:  '84 BU lights.png
Views: 2558
Size:  495.5 KB

Name:  '84 Troubleshooting BU.png
Views: 2007
Size:  669.7 KB

If anyone has an '84 and needs wiring diagrams here's a zip-file from the CAC that has them all, it's well done and I've checked most of it against an '84 FSM. No diagnostics just diagrams.

http://www.corvetteactioncenter.com/...atics-156.html
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Old 03-30-2016, 07:18 AM
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Default OMG thhank you !!

Originally Posted by WVZR-1
It was only a couple more snapshots so I thought I'd just finish this:

"65GGvert" posted an incorrect image but here's the FUSE BOX, the wiring diagram and the diagnostics. His mention of "if you have directional that work it's NOT the fuse is correct".

Attachment 47965091

Attachment 47965092

If anyone has an '84 and needs wiring diagrams here's a zip-file from the CAC that has them all, it's well done and I've checked most of it against an '84 FSM. No diagnostics just diagrams.

http://www.corvetteactioncenter.com/...atics-156.html
I just want to thank you all for your help it worked perfectly !!! I now have reverse lights!!!!!

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