Im an idiot when it comes to a lot of things, but especially automotive electronics. I cant figure out if my oil pressure gauge is bad or what. Lets just assume I actually have good oil pressure.
Here is what I know:
1. When I start the truck, the oil pressure goes up to about 25%, then slowly goes back down over the next 20-30 seconds to rest at the base line. Revving the engine or idle speed doesnt make a difference. It doesnt move after it gets back to zero.
2. To test the gauge, I grounded out the sending unit wire to the battery, and the needle does not move at all when I turn the key on (not running).
3. My test light will light up when grounding the sending unit wire to battery ground with the key off, but when the key is on, it doesnt light up. (I have no idea what this means.)
Any help? This is probably not enough info to make any conclusions.
Is there an Auto Electronics for Dummies book? I know somebody is going to tell me to "check continuity" with an "ohm meter" or something and I have one of those, but I have no idea how to use it. Im hoping there is some random thing that people with small minds can do like turning my hazards on while in 4th gear with key on/engine off and it will tell me if its the gauge or sender.
Here is what I know:
1. When I start the truck, the oil pressure goes up to about 25%, then slowly goes back down over the next 20-30 seconds to rest at the base line. Revving the engine or idle speed doesnt make a difference. It doesnt move after it gets back to zero.
2. To test the gauge, I grounded out the sending unit wire to the battery, and the needle does not move at all when I turn the key on (not running).
3. My test light will light up when grounding the sending unit wire to battery ground with the key off, but when the key is on, it doesnt light up. (I have no idea what this means.)
Any help? This is probably not enough info to make any conclusions.
Is there an Auto Electronics for Dummies book? I know somebody is going to tell me to "check continuity" with an "ohm meter" or something and I have one of those, but I have no idea how to use it. Im hoping there is some random thing that people with small minds can do like turning my hazards on while in 4th gear with key on/engine off and it will tell me if its the gauge or sender.
