'40 brake lamp switch / master cylinder issue?

[kirkf]

Thanks!

Kirk

[mike42]

I’m encountering the same problem and was wondering who sells the better switch than NAPA ?

THX

[Kube]

Originally Posted by mike42

I’m encountering the same problem and was wondering who sells the better switch than NAPA ?

THX

Mike, see post #25. If you want me to search the exact switch product number, let me know.

[mike42]

Okay thx

[mike42]

Kube what store did you buy it from. I’ve heard not so good things on Napa and I think the new one I bought is no good too. Thx…..

[Ggmac]

Sponsored Links (Register now to hide all advertisements)

Just a test idea . If the swith is npt cant we just hook it to a grease gun and pump a very little . Or make a zerk fitting to the correct brake light switch thread . I know you’d have to rinse out the grease but it would identify a bad or good switch . If bad , no need to clean out the old grease .

[Kube]

Originally Posted by mike42

Kube what store did you buy it from. I’ve heard not so good things on Napa and I think the new one I bought is no good too. Thx…..

Like you, two from Napa that were poopy.

Amazon:
WQSING Hydraulic Rear Brake Light Switch DS-272191 Compatible with Harley Davidson Sportster Softail Touring Dyna Super Electra Glide Road King FXR Deluxe Fat Boy Low Rider Heritage 72023-51A

[Charlie Stephens]

Originally Posted by V8COOPMAN

Kube never even hinted at SILICONE brake fluid! Where the heck did that come from?

Coop


.

Silicone brake fluid goes through switches fast and going through 3 switches makes it a logical possibility. It is the first thing I thought of and I would have posted it but someone else already had.

Charlie Stephens

[Kube]

Originally Posted by Charlie Stephens

Silicone brake fluid goes through switches fast and going through 3 switches makes it a logical possibility. It is the first thing I thought of and I would have posted it but someone else already had.

Charlie Stephens

Charlie, going through three new brake switches in the course of three days? Not likely even if silicone fluid were involved.
Nope, just bad switches right out of the boxes.

[Mart]

I noticed that ford cortina about 1967 uses a 1/8 npt switch. Rockauto carry them. They have spade terminals rather than round but might represent something worth trying. One brand has a hex body which might represent a different manufacturer than the heavily pressed body of the replacement early ford type switches. I have had some failures too and have adapted mech switches.

[pistonbroke]

I with you Mart. I hate to crossbreed stuff as some of you know, but the mechanical switch that GM used on all the old five window (47 - 54) pickups works very well on my 41 pickup under the floor and out of sight for the most part. Having bright good working is a huge safety factor so this seemed acceptable to me as I drive mine every chance I get. The added bonus is you can flash your brake lights without actually applying the brakes. Tim

[aussie merc]

guys over here are changing to the switch from Harley Davidson they arnt cheap but they work