Oil pressure gauge
On my 79 Olds 403 powered Trans am the preivous owner put in after market oil and temp gauges and hacked up the wiring harness. My question is on the oil pressure switch there is a small tube which runs thru the fire wall and connects to the gauge. Does the original switch only use a electric wire tied into the harness plug that plugs into the gauge cluster, or does this tube coming out of the switch get connected somewhere?
Thanks for any help my manual doesn't address this.
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1971 TR6.
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