Oil Pressure Gauge ELECTRICAL

[Coder24]

OK i have a glowshift oil pressure gauge on my pillar and when I hook it up to a power it tachs out.(car not on) When I pull the ground it kills then when i hook it back up it tachs out again. it lights up fine but the gauge is f-ed up! I have NEW wires that are not broken anywhere. Everything is hooked up...The Sending unit wire, the ground...and the power is hooked up to a hot under the dash just above the fuse box...Can anyone shed some light on this?

 

[Coder24]

So still not working?

is that a good spot for the aftermarket oil pressure gauge? I cant find a hot other than the cig lighter that will work...does anyone know which wires are the ignition wires?

 

[95TalonOwner]

I just ran my own hot from the battery into my cabin and have different switches spliced off that.

 

[Coder24]

ok this gauge is really making me want to kill myself! NO MATTER WHAT HOT I GO TO IT PEGGS OUT!

 

[VPrime]

are you sure you got the right connections on the back of the gauge?
(Sending unit going tot he senting unit wire, +12V going to 1V ground to ground)?

 

[95CarbonEclipse]

After turning the car off and the gauge 'pegs out', did you continue to watch it to see if it stays pegged out?

Some accessories' power is connected to the ECU which will go off about 10 seconds after the car is turned off. You'll know when the ECU power goes off because you'll hear it click off. Your gauge should completely 'un-peg' itself after the ECU goes off.

As far as an ignition power source goes, your cigarette lighter power should be fine. Another is right off the ECU itself... there's a diagram of exactly which wire it is on here. I'll see if i can find it.

 

[95CarbonEclipse]

This link is an install guide for a A/F gauge... but if you look at the ECU pinout, you'll see which wire is the correct wire for a 12v ignition source.

http://www.roadraceengineering.com/instructions/afmeterinstallinstructions.htm

 

[95CarbonEclipse]

I just ran my own hot from the battery into my cabin and have different switches spliced off that.

Wouldn't that be constant power?

 

[Coder24]

ok well...no matter what...car on or off it pegs. No matter what source I go to. Yes I have everything hooked up correctly to the gauge. I think I'm going to unrun the wires and pull the gauge out of the pod to see what i can do and wire it up without the wires ran then run them once i know it works.

 

[95CarbonEclipse]

ok well...no matter what...car on or off it pegs. No matter what source I go to.

What about when it's completely disconnected, is it still pegged then?

I think I'm going to unrun the wires and pull the gauge out of the pod to see what i can do and wire it up without the wires ran then run them once i know it works.

That'd probably be the best idea for the time being. Honestly, (and i know you said it's hooked up correctly) but it sounds like the sending unit wire is hooked up as your power. I'm not sure if I'd go expieramenting by swapping wires around. Something tells me that if the sending unit wire touches a hot wire, you're f**ked.

 

[Coder24]

What about when it's completely disconnected, is it still pegged then?


That'd probably be the best idea for the time being. Honestly, (and i know you said it's hooked up correctly) but it sounds like the sending unit wire is hooked up as your power. I'm not sure if I'd go expieramenting by swapping wires around. Something tells me that if the sending unit wire touches a hot wire, you're f**ked.

ok i figured it out. The sending unit wasn't grounding properly. The gauge is working right now. Thanks for all your help guys. I ran a wire from the sending unit itself to the frame...it was supposed to ground itself.