honda b100 oil pressure light

[robert53a]

Hi I just bought an old (1985) honda b100. It old beat up ,but appears to run good and pump water good. The oil pressure light is not lite, so I have only run it at idle for a minute. i need to check the oil system for pressure but before i go look for a test gauge. i have pulled the light out(undid the connectors and removed from case). How do you test this light? Can I use a multi meter or hook it directly to a battery? Thanks for you help......Robert

 

[ricovw]

Re: honda b100 oil pressure light

Hook it up to a 9volt battery. You can also check the output from the motor to the light. I can't remember the voltage, but I think it was .5 volts.

 

[robert53a]

Re: honda b100 oil pressure light

Thanks for the help, After doing your check i have found the light is burnt out. A new one is on the way. Thanks

 

[robert53a]

Re: honda b100 oil pressure light

These lights are strange. I hooked the new light to the 9volt battery and got nothing. I also used a multi-meter to check continuity on the 2000 oms setting and it showed it was open. Here's the kicker, I installed it on the motor and it worked. I'll leave well enough alone. It's still puzzling for my old brain......Robert

 

[pvanv]

Re: honda b100 oil pressure light

That's because it's not an incandescent lamp. It's an LED. The D is for diode. Conducts one way (with about a 0.7v drop), and is "open" in the other direction.