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Old 06-03-2023, 08:53 PM   #1
68gmcdude
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1968 GMC Reverse Lights not Working

Hi All...
I have a ’68 GMC stepside with a 3-speed on the column. Both reverse lights have stopped working. What is the best sequence of steps to diagnose the issue? Thanks!
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Old 06-04-2023, 12:18 AM   #2
Smitty
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Re: 1968 GMC Reverse Lights not Working

Check the switch on the lower end of the steering column inside the cab. If the house and bulbs are good. You can Google it also to find articles on it. Or go to the FAQ section.
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Old 06-04-2023, 03:56 AM   #3
68gmcdude
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Re: 1968 GMC Reverse Lights not Working

Quote:
Originally Posted by Smitty View Post
Check the switch on the lower end of the steering column inside the cab. If the house and bulbs are good. You can Google it also to find articles on it. Or go to the FAQ section.
Thank you Smitty...
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Old 06-04-2023, 09:28 AM   #4
dmjlambert
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Re: 1968 GMC Reverse Lights not Working

Also check the fuse, it is labeled B/U LPS.
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Old 06-04-2023, 09:53 AM   #5
68gmcdude
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Re: 1968 GMC Reverse Lights not Working

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Originally Posted by dmjlambert View Post
Also check the fuse, it is labeled B/U LPS.
Will do! Thanks!
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Old 06-04-2023, 02:37 PM   #6
72SB
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Re: 1968 GMC Reverse Lights not Working

if the BU light switch is at base of steering column for 3 OTT, what is the switch on the upper, DS, of trans, Saginaw, for? Mine is a 72. I assumed it is the BU light switch
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Old 06-04-2023, 08:01 PM   #7
'68OrangeSunshine
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Re: 1968 GMC Reverse Lights not Working

On my 4-speed SM465, the B/U Switch is on the transmission. 3-speeds may be different.
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Old 06-13-2023, 08:10 PM   #8
68gmcdude
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Re: 1968 GMC Reverse Lights not Working

Simple fix. Fuse was blown. Contacts were rusty so I cleaned them up with Dremel wire wheel.
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