 Oil Pressure Gauge, was working fine - but now it is pegged to the right side |
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| rgolia |
 Apr 15 2019, 02:41 PM
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#1
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GeoJoe  Group: Members Posts: 719 Joined: 5-February 10 From: PA Member No.: 11,329 Region Association: North East States 
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Not sure what happened over the winter, but my oil pressure gauge is now pegged to the right. Worked fine all last driving season. Can a shot sender unit be the cause? Mine is really old. (IMG:style_emoticons/default/sad.gif)
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| Tom_T |
Apr 15 2019, 02:45 PM
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#2
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TMI.... Group: Members Posts: 8,321 Joined: 19-March 09 From: Orange, CA Member No.: 10,181 Region Association: Southern California
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Try changing to clean oil & cleaning the sender good first, & check the wiring & connectors up to the console gauge. May just be gunked-up.
(IMG:style_emoticons/default/beerchug.gif) Tom /////// |
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| SirAndy |
Apr 15 2019, 02:47 PM
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#3
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Resident German Group: Admin Posts: 42,205 Joined: 21-January 03 From: Oakland, Kalifornia Member No.: 179 Region Association: Northern California |
Did you fiddle with the wires? Sounds like you switched the sending unit wire and ground wire on the gauge.
G stands for "Geber" which means sending unit in German, it's *not* ground ... (IMG:style_emoticons/default/shades.gif) |
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| 914Toy |
Apr 15 2019, 02:47 PM
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#4
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Senior Member Group: Members Posts: 746 Joined: 12-November 17 From: Laguna beach Member No.: 21,596 Region Association: Southern California
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QUOTE(rgolia @ Apr 15 2019, 01:41 PM)  Not sure what happened over the winter, but my oil pressure gauge is now pegged to the right. Worked fine all last driving season. Can a shot sender unit be the cause? Mine is really old. (IMG:style_emoticons/default/sad.gif) My guess, wiring - check connections and then possible grounding. |
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| Dave_Darling |
Apr 15 2019, 03:55 PM
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#5
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914 Idiot Group: Members Posts: 15,161 Joined: 9-January 03 From: Silicon Valley / Kailua-Kona Member No.: 121 Region Association: Northern California
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Something electrical--
You unplugged the wire (though I think that would cause a zero reading rather than high) You smashed the wire somewhere, shorting it to ground The case of the sender is no longer grounded correctly You hooked it up wrong --DD |
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| 914Sixer |
Apr 15 2019, 04:32 PM
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#6
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914 Guru Group: Members Posts: 9,122 Joined: 17-January 05 From: San Angelo Texas Member No.: 3,457 Region Association: Southwest Region
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Wire touching ground. Sending wire gets brittle from heat, breaks insulation and touches the metal brackets that hold it. Now you have the sender grounded out.
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| bdstone914 |
Apr 15 2019, 05:36 PM
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#7
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bdstone914 Group: Members Posts: 4,905 Joined: 8-November 03 From: Riverside CA Member No.: 1,319 |
QUOTE(914Sixer @ Apr 15 2019, 03:32 PM) Wire touching ground. Sending wire gets brittle from heat, breaks insulation and touches the mental brackets that hold it. Now you have the sender grounded out. (IMG:style_emoticons/default/agree.gif) |
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| bdstone914 |
Apr 15 2019, 05:39 PM
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#8
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bdstone914 Group: Members Posts: 4,905 Joined: 8-November 03 From: Riverside CA Member No.: 1,319 |
QUOTE(bdstone914 @ Apr 15 2019, 04:36 PM) QUOTE(914Sixer @ Apr 15 2019, 03:32 PM) Wire touching ground. Sending wire gets brittle from heat, breaks insulation and touches the mental brackets that hold it. Now you have the sender grounded out. (IMG:style_emoticons/default/agree.gif) Either that or in the sender. Remove the se der wire from the sender. Connect an Ohm meter to the sender terminal G and to ground. If it shows continuity to ground the sender is bad. It should show a low resistance level and change with oil pressure change. |
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| rgolia |
Apr 16 2019, 10:00 AM
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#9
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GeoJoe Group: Members Posts: 719 Joined: 5-February 10 From: PA Member No.: 11,329 Region Association: North East States
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Thanks for all the advice. I am going to snoop around and see if anything got messed up. I think I will start by taking the gauge out and wiring it direct to the sender. If it works, that should take a sender issue off the table.
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| Chi-town |
Apr 16 2019, 10:11 AM
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#10
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Senior Member Group: Members Posts: 851 Joined: 31-August 18 From: Disneyland Member No.: 22,446 Region Association: Southern California |
Remove the wire from the sender if the gauge drops it's the sender, if it doesn't the wire is shorted to ground somewhere.
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