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Oil press gauge question, wiring

GFB

Member
107
1
18
Location
Northwest IN
Truck came with a malfunctioning gauge, or sending unit, still troubleshooting. When I removed the plugs from the original gauge, I did not annotate which wire was on left (zero) side if looking at face, and which was right. I don't want to hurt the gauge. by hooking up 24v to the wrong terminal, which I what I assume wire 27 is. . Which side is 27 and which is signal wire (36)?

Thanks!
 

GFB

Member
107
1
18
Location
Northwest IN
One plug and receptacle has matching rubber ribs.
I'm evidently not the first one to mess with it. The rubber receptacles on original gauge aren't there. Looks like the new replacement has ribbed receptacle on wire from sending unit (on right side if looking at the front). This appears to be the same case with other gauges based on the wiring labels. Signal wire from sending units go to the ribbed receptacle.
 

GFB

Member
107
1
18
Location
Northwest IN
Got it hooked up now, with a supposedly good replacement 60 psi sender. Gauge is pegged at 60 psi during idle. Also Tried a newer style Clark Bros gauge and it reads 0 all the time with it , but I accidentally dropped that gauge on the concrete floor in my shop, so I guess there's a chance I broke it. . I'll probably just look for place to plug in a mechanical gauge to double check.
 
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