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What have you done to your FMTV or LMTV today

R

Ronmar

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Ok, the larger sender pointing up is the gauge sensor, the smaller sensor lower, aft inboard on the same oil manifold, looks like the 15 psi oil sw that controls the oil light, alt energize and starter lockout…

what year is your truck?
 
MatthewWBailey

MatthewWBailey

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Ronmar said:
Ok, the larger sender pointing up is the gauge sensor, the smaller sensor lower, aft inboard on the same oil manifold, looks like the 15 psi oil sw that controls the oil light, alt energize and starter lockout…

what year is your truck?
Click to expand...
Truck year is '04. Engine plate is '99

So that psi switch is set to 15? That's good then since it's not dropping out at idle.

I would assume pressure switches are more robust than pressure transducers.

I see now on the schematic line 37 that wire 34a feeds the idiot light.
 
Last edited:
R

Ronmar

Well-known member
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Port angeles wa
MatthewWBailey said:
Truck year is '04. Engine plate is '99

So that psi switch is set to 15? That's good then since it's not dropping out at idle.

I would assume pressure switches are more robust than pressure transducers.

I see now on the schematic line 37 that wire 34a feeds the idiot light.
Click to expand...
yea if your oil light isn't coming on and the alt isn't dropping of line that sw is not closing. How close it is to a 15PSI activation point and its amount of hysteresis is another story, you would have t take it off and connect it to a regulator and yet another gauge to map its response. could also check that mechanical gauge response...
 
MatthewWBailey

MatthewWBailey

2025 !!
Steel Soldiers Supporter
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1,568
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Location
Mesa Colorado
Ronmar said:
yea if your oil light isn't coming on and the alt isn't dropping of line that sw is not closing. How close it is to a 15PSI activation point and its amount of hysteresis is another story, you would have t take it off and connect it to a regulator and yet another gauge to map its response. could also check that mechanical gauge response...
Click to expand...
My alt is the delco pad mount so it doesn't have the "energize" wire. I think it's 1200rpm auto on
 
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