Quote:
Originally Posted by cornemuse
'83 300CD. What is the fuel capacity?? My owners book says 21 gal. cap. yet I rarely add more than 16 gallons as the low light flashes & the needle is bouncing on the peg. Yesterday I fueled up at 19 gal & the light was (& had been) lit constantly for some time, made a detour to fill her up. (diesel = $2.83 - prem gas = $4.19, lovin' it !!)
Is the low light sensor in the tank sending unit, or in the guage?? Or is it a seperate system?
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Those sender units are almost always the problem, they are pricey new, $250 or $280. they get mucked up like crazy so cleaning may be all you need. Be careful, there is a hair thin wire easy to break, finicky difficult to solder patch it back, though it can be done. I patched in thin copper which for the moment has done the trick.
its not too hard to refurbish, finicky to solder 46 AWG nichrome wire, you can buy enough for 125 sender repairs for $5 off ebay
the nut is 3mm X .5mm thread pitch
on mine the ground wire tab broke off. It attaches at the bottom of the plastic block unit at bottom, to one of the two exposed contacts at the bottom of the sender, that the float touches when fuel level is down that far, completes the ground to illuminate the dash reserve light that gets its "hot" at the instrument cluster. Use a 5 mm socket to remove the nut and plastic block at the bottom. To patch that tab back I used a piece of 14 or 16 ga solid copper, hammered it to a flat tab on an anvil, drilled a hole to it can be soldered to the copper around the threaded rod hole at the bottom WITHOUT TOUCHING THE ROD after its installed. soldered it on, then after its back on the threaded rod solder the ground wire back to the new tab.
I spent loads of time getting mine to work right, pleae feel free to get back with questions.