Hi Mike, you need an SL137. It is the same as the SL136 but with the larger thread. You can look them up on our website under parts and supplies>switches>1958 Plymouth. They are $35 here if you can’t get them from NAPA.

Jim Carpenter

Collectors Auto Supply

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From: Forward Look Mopar Discussion List [mailto:L-FORWARDLOOK@xxxxxxxxxxxxx] On Behalf Of William Huff
Sent: June 28, 2010 2:19 PM
To: L-FORWARDLOOK@xxxxxxxxxxxxx
Subject: Re: [FWDLK] 58 Plymouth Brake/stop light switch

Some folks have used a switch from Harley Davidson available at the dealer. They also claim they last longer than the NAPA switches.

Bill Huff

At 6/28/201005:07 PM, Mike & Chris Morelli wrote:

Took out my 58 for a show Saturday and found while on the way I had no brake lights. I found I had tail and signal lights, which leads me to think it is my stop light switch. (I had the same problem last year w/my 57). I went to NAPA where I got my 57's part # SL134. Returning home I found my 57's power brake switch is different than my 58's non power brake switch. I returned to NAPA with my switch and was told an SL136 would work. I found the prongs match but the thread is 1/4 inch where my old one is 1/2 inch. I purchased an adapter, and hooked it up. It failed to work.
I contacted Andy Berbaum in Mass, who said the 1/2 inch was the correct size but he is fresh out.
Does anyone know where I can purchase a brake light switch that will fit. (I have a 318 ci).

Thanks,
Mike
57 & 58 Plymouth Belvederes

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