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Jeeps4Brains Member
Joined: Apr 15, 2005 Posts: 133 Location: Up State SC
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Posted: Sun Jun 11, 2006 6:15 pm Post subject: Brake Light Switch Test |
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Is there a way to test the brake light switch while not mounted on the master reservoir?
I hooked a meter up to the leads and took a small drill bit and gently pressed into the fluid hole but nothing happened. Didn’t press really hard as I was not sure if this would screw up a diaphragm or not. |
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Cacti_Ken Member
Joined: Apr 20, 2005 Posts: 1021 Location: Silsbee, Texas
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Posted: Sun Jun 11, 2006 8:09 pm Post subject: |
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You might damage the the switch if you force a probe into it. However If I recall it is a small hole. You could connect to your air compressor.
I haven't tested one to see how much pressure it takes to actuate one though. _________________ Tropical Veteran
35th Inf. Reg. "CACTI" 4th I.D. VN
Amateur Radio K5XOM |
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Jeeps4Brains Member
Joined: Apr 15, 2005 Posts: 133 Location: Up State SC
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Posted: Mon Jun 12, 2006 7:34 pm Post subject: |
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You are right I hardly put any pressure on the drill bit as I was worried I would puncture the diaphragm.
I talked to someone today that said the same thing you did and suggested I try stepping up air pressure to about 100psi.
Then there is the issue of it being the old switch and who knows what gunk is up inside there. |
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Jeeps4Brains Member
Joined: Apr 15, 2005 Posts: 133 Location: Up State SC
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Posted: Fri Jun 16, 2006 8:21 pm Post subject: |
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Here is what I did.
It turns out the cheepo air blow off nozzle I have, if you unscrew the tip, the size and threads are the same as on the brake light pressure switch. So I screwed the switch into the handle of the blow off nozzle. Then I opened the air valve to the line and pressed the valve on the nozzle. I had the ohm meter plugged into the switch. The switch didn’t close until I got to 120 psi. Dose that seem like the correct pressure for the break switch to operate at? |
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wesk Site Administrator
Joined: Apr 04, 2005 Posts: 16260 Location: Wisconsin
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