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1956 Packard 400 oil pressure gauge switch
#1
Not too shy to talk
Not too shy to talk

Ernie Baily
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Hello, I'm into my 4th oil presure gauge switch. I ground the wire and the dash gauge reads. How ever I have problems having one work for any period of time. The first one didnt work at all, the second one worked briefly(i found a broken wire tremial. I put on a new wire end with a nut( I suspect I turned the nut too hard and it started to spin) this time I bought a new one on and I changed to a push on treminal and all I got was a pulse and then nothing. I'm at my wits end. Plerase advise!

Posted on: 2022/8/20 11:02
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Re: 1956 Packard 400 oil pressure gauge switch
#2
Forum Ambassador
Forum Ambassador

HH56
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What sender are you buying? There are the gauge type which has a changing resistance for the gauges in senior models and the on/off switch type used on Clippers with idiot lights.

I know others have had good results and are using the Napa OP6091 with the senior models. If that is what keeps failing I would wonder if you have something external to the sender going on or if the sender is somehow not making a good ground.

If you are using teflon tape or some kind of sealant on the threads some of those products are known to not provide a solid ground.

Posted on: 2022/8/20 11:22
Howard
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Re: 1956 Packard 400 oil pressure gauge switch
#3
Home away from home
Home away from home

R H
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With the Melling oil pump. The napa gauge in my 400 is starting to read erratic.

Think its been in 2 years or so.

Posted on: 2022/8/20 13:33
Riki
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Re: 1956 Packard 400 oil pressure gauge switch
#4
Not too shy to talk
Not too shy to talk

Ernie Baily
See User information
I took the teflon tape off, so it should be grounded good. The sender is the one for a gauge not a idiot light. I'm going to check the wiring from the Ignion resitor to the gauge(although the water temp gauge is working and the fuel gauge is working. I guess I'll keep digging!

Posted on: 2022/8/21 8:40
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