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1955 brake light issue


Guest 55Super

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G'day all

We're now having issues with our brake lights on our '55 Super.

First up we put new globes in (among other things) then find the fuse keeps blowing. Put the old globes back in and all ok. Anyone know the exact specs on the correct globes? The ones it's running has nothing ledigble written on them.

Second - and more imporantly - the brake lights only come on when the pedal is pushed very firmly (closer to the floor). Obviously not the best set up. Is there any adjustment in the hydraulic switch etc?

Thanks again :)

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Are you using Silicone Brake Fluid (DOT 5)??? If so, you will find that the brake hydraulic switch will need to be replaced pnce a year. Fortunately the switch is an inexpensive over the counter item.

For some reason the pressure needed to activate the switch goes up over time when silicone fluid is used. That's one reason I went back to DOT 3 fluid, and flush the system on each car every April.

--Tom

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Hi mate, nah we've not changed to silicon in this car (do use it with 2 others though). Thanks for pointing that out though, as we would've not thought about that side of it! We'll order one shortly (unfortunately no over the counters here for it).

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Are you using Silicone Brake Fluid (DOT 5)??? If so, you will find that the brake hydraulic switch will need to be replaced pnce a year. Fortunately the switch is an inexpensive over the counter item.

For some reason the pressure needed to activate the switch goes up over time when silicone fluid is used. That's one reason I went back to DOT 3 fluid, and flush the system on each car every April.

--Tom

Not trying to be contrary but all my cars use DOT 5 and all but the Vette have hydraulic pressure type switchs. No switch failures here at all and they all are the switchs that came on the cars originaly. The 39 pickup has had the DOT 5 for about 13 years. Maybe new replacement swithes are yet more repro-junk.........Bob

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  • 2 weeks later...
Guest 55Super

thanks for the Dot 5 update. It is prefferable once a car's been done up - the paint stripping effect of non-silicon brake fluids is not desirable!

New switch is in and working so far :)

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