Just run 12V to a small light under the dash and ground it through the original pressure switch. It will light when there is low pressure and go out when the switch opens, which is around 5 psi. The other option would be to get an electronic oil pressure guage. Some come with a warning light switch built in. I have a JC Whitney gauge that reads 0-100 psi and has a switch that opens at around 10 psi. I ran 12v to the gauge and mounted a light next to it. The sender has one wire for the guage and one for the light. Works OK, although a VDO would be much more accurate. I still have the original light in the dash. Jay |
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