Copilot and fuel sender issues
July 4, 2012 - 12:53pm
Hello everyone,
I have all my electronics hooked up (pretty much) and I was testing out my fuel tank. The copilot isn't reading anything from the sender. This tank isn't a GC one, but it was my understanding that other senders should still work with adjustment in the config menu. The copilot reads a steady 0 no matter the position of the sender. Also I did try flipping the wires, but I know they are correct since I tested them with my meter (positive to the center pin, and ground to the ground).
Anyone have any advice? The software on the copilot is 1.7 or 1.8 I believe. It says 2007. Could this be part of the issue? The picture below is the OHM reading with the car off (no power) at the "empty" position. With the car (current flowing) I get no ohm reading. If that means anything.
Thanks!
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The best way to check the resistance of the sender unit :
Remove the wirings from the sender unit then measure the resistance of the unit.
Check OHM readings while moving the float from empty to full position. The reading should
increase or decrease continuously. It depends on different senders for different cars.
The senders for industrial standard, AFAIK, Empty/Full would be 240/33.5 OHM or some reading
similiar to that. I think the highest reading should be less than 300 OHM.
I think you have a BAD sender.
Try replace the sender with a resistance close to 240 and 33.5 OHM to see if the co-pilot reads EMPTY (low number)
and FULL (high number)
__________________
'05 Cummins CTD 24V HPCR RAM 2500 QC SLT SB Black 4X4 48RE 325 hp 610 ft.lbs
GC Kit + 3rd Tank WVO(80%)/RUG(20%) + Co-Pilot
3-Tank Operation managed by Co-Pilot: Blending(warm up) / Veggie(hot run) / Diesel(purge for next start)
Smarty Jr 40/70/100 hp (Timing Map Modification)