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Old 05-23-2020, 08:54 AM
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Pulsating reverse light problem.

(Maybe this post belong under drivetrain and transmission, I don't know.)

Not really a major problem, but why is the reverse light sometimes pulsating?
No other electric problems, and the transmission also work well.
At first I thought it was because I hadn't got the trans 100% into reverse gear, but that's not the reason.

Sometimes the backup light pulsates, sometimes it don't.

6 speed T56 manual transmission in a 34 Roadster with Chevy small block.
The backup lamp is a LED lamp.

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Old 05-23-2020, 10:58 AM
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Sounds like a connection, switch contact, or switch to linkage issue to where solid contact is not made every the time.

Bogie
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Old 05-24-2020, 03:12 AM
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The switches are robust. But overtime the rubbing against them to activate them wears them down to where the contact is barly touching and you get that flicker of that switch just barely being pushed enough. Lucky for you yours is easy to get to.

Pull the electrical connection off carefully, remove the switch and plug the connector in. Turn the key to the acc position then press on the plunger on the switch. Your reverse lights will light up and should hold steady. If they do, slap the old switch in, go down and buy a new switch. If they flicker your switch is good and you have a ground or connection issue.
I would look at the grounds then the bulb connections after the switch.
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Old 05-24-2020, 05:26 AM
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Thanks for your answer.
Maybe a dumb question, but can I loosen the swithch without draining the transmission oil?
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