Author |
Message |
DuneSluggy Samba Member
Joined: May 19, 2014 Posts: 36 Location: Lehi, UT
|
Posted: Sun Jul 27, 2014 11:16 am Post subject: Oil Pressure Test Light |
|
|
This seems like the dumbest question but I have fried 2 LED test lights and after nearly an hour of searching can't find a definitive answer, so I'm querying the hive mind:
I am test running my engine on the pan and want to wire in a light for oil pressure. It was mentioned by Dale in one of his awesome test wiring posts but it doesn't have the full info. Obviously the ground will be supplied through the engine case, but where would I connect the positive to? I was thinking that the 15 terminal on the coil would be the obvious choice, but two ruined lights later, I'm not so sure.
Any help is appreciated.
Thanks! _________________ "Hard work always beats talent if talent doesn't work hard."
The Hellcat:
Coyote-clone buggy with 1835cc, stock carb....for now. |
|
Back to top |
|
|
Northof49 Samba Member
Joined: July 22, 2013 Posts: 1759 Location: Winnipeg, Manitoba, Canada
|
Posted: Sun Jul 27, 2014 1:27 pm Post subject: |
|
|
Since you want to run an idiot light, the power must pass through that bulb, where it is situate. You need to run power from key on power at the dash, through the idiot light, to the rear sensor, and the grounded through the sensor. _________________ 1958 Karmann Ghia owner |
|
Back to top |
|
|
DuneSluggy Samba Member
Joined: May 19, 2014 Posts: 36 Location: Lehi, UT
|
Posted: Sun Jul 27, 2014 2:07 pm Post subject: |
|
|
Ok, would there be another way I could rig up real quick? I currently have no dash or wiring in place as I am testing the engine on a rolling chassis. I only have the rudimentary wiring necessary to turn over the starter at this point. _________________ "Hard work always beats talent if talent doesn't work hard."
The Hellcat:
Coyote-clone buggy with 1835cc, stock carb....for now. |
|
Back to top |
|
|
VOLKSWAGNUT Fastest VW Belt Changer
Joined: October 14, 2007 Posts: 11056 Location: Flippin' a Belt........ .... Off-n-On ... NC USA
|
Posted: Sun Jul 27, 2014 2:15 pm Post subject: |
|
|
Hook the positive (clip) to the positive on your coil or MAIN battery starter wire.
Test probe to the oil switch.
Or vica-versa
Test lights are dumb.. they just need a power and a ground... from the same power and ground source...
In other words...
Just be sure the power source you are using is also the same source for the ground and those have to be shared with your engine and chassis..
. _________________ aka Ken {o\!/o}
Its your vehicle- stop askin' for approval-do what YOU like for cryin' out loud
Better to roll em' how you want and wear em' out-than lettin' em' rot out
Its about the going not the showing
Rebuilt to drive not decorate
WANTED: Local Eatin' Joints, Triple D for TheSamba contributions here http://www.thesamba.com/vw/forum/viewtopic.php?t=570510
Search "VOLKSWAGNUT" on YouTube since you cant watch a "certain" BELT change video round here
Usually and often edited |
|
Back to top |
|
|
KTPhil Samba Member
Joined: April 06, 2006 Posts: 34022 Location: Conejo Valley, CA
|
Posted: Sun Jul 27, 2014 2:34 pm Post subject: |
|
|
LEDs usually burn out if they are hooked up backwards. |
|
Back to top |
|
|
VOLKSWAGNUT Fastest VW Belt Changer
Joined: October 14, 2007 Posts: 11056 Location: Flippin' a Belt........ .... Off-n-On ... NC USA
|
Posted: Sun Jul 27, 2014 2:42 pm Post subject: |
|
|
KTPhil wrote: |
LEDs usually burn out if they are hooked up backwards. |
Good point... .. I hate them (LED test lights)
Use the vice-versa method I mentioned above.....
Clip (ground) to oil pressure tab and probe (power) to coil power..
. _________________ aka Ken {o\!/o}
Its your vehicle- stop askin' for approval-do what YOU like for cryin' out loud
Better to roll em' how you want and wear em' out-than lettin' em' rot out
Its about the going not the showing
Rebuilt to drive not decorate
WANTED: Local Eatin' Joints, Triple D for TheSamba contributions here http://www.thesamba.com/vw/forum/viewtopic.php?t=570510
Search "VOLKSWAGNUT" on YouTube since you cant watch a "certain" BELT change video round here
Usually and often edited |
|
Back to top |
|
|
Northof49 Samba Member
Joined: July 22, 2013 Posts: 1759 Location: Winnipeg, Manitoba, Canada
|
Posted: Sun Jul 27, 2014 2:45 pm Post subject: |
|
|
LEDs require a resistor to limit current. What sort of led are you using? _________________ 1958 Karmann Ghia owner |
|
Back to top |
|
|
DuneSluggy Samba Member
Joined: May 19, 2014 Posts: 36 Location: Lehi, UT
|
Posted: Sun Jul 27, 2014 7:35 pm Post subject: |
|
|
Thanks for the info all!
I was just using a cheapo LED indicator light from an auto parts store. I will rig something up with an incandescent bulb. Just wanted to make sure my fundamental understanding of DC electricity wasn't at hazard here! _________________ "Hard work always beats talent if talent doesn't work hard."
The Hellcat:
Coyote-clone buggy with 1835cc, stock carb....for now. |
|
Back to top |
|
|
|