Gas gauge no work.... HELP
04-19-2012, 05:49 PM
#1
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Gas gauge no work.... HELP
Hey guys i need help im at my wits end on this one, i have a 87 toyota with a 84 22r motor meaning the body is a efi truck and the motor is a manual pump, my issue is that i cant get my gas gauge to work, does anyone have any information on the wiring of it, has anyone had this problem, is the gauge and pump separate wiring? any help would be great, relays fuses anything i feel like im beating a dead horse
04-20-2012, 09:03 AM
#3
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04-21-2012, 12:00 AM
#5
It is possible since you no longer use the electric fuel pump.
That the harness going to the fuel sender is unplugged.
Did you just get this or did you just swap the engine??
Has the fuel gauge ever worked??
The gauge is powered by the 15amp engine fuse
The gauge has a Y/R (yellow red tracer) wire coming from the sending unit
The low fuel light is a Y/L(yellow blue tracer) if you have a light
The ground is Brown
Could be a bad sending unit cut wires connection unplugged.
Good luck
That the harness going to the fuel sender is unplugged.
Did you just get this or did you just swap the engine??
Has the fuel gauge ever worked??
The gauge is powered by the 15amp engine fuse
The gauge has a Y/R (yellow red tracer) wire coming from the sending unit
The low fuel light is a Y/L(yellow blue tracer) if you have a light
The ground is Brown
Could be a bad sending unit cut wires connection unplugged.
Good luck
04-21-2012, 12:16 AM
#6
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Thread Starter
Finally this is the info i was needing, lol thank you, the truck is new i rescued it from meth heads and iv been trying to part it back together after this all i need are tires and its back on the road again, they put a 84 22r motor in it, and had two bolts in the tranny and tried to drive it... lol
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04-23-2012, 04:36 PM
#9
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checked all three fuses, well all the fuses on the fuse block and they are all good, there is no power going to the gas tank, well there is but its light, the cover on the kick panel fuse block doesnt say fuel or anything like that, so i dont know what imma do. trying to regather and get a new plan.
04-23-2012, 10:24 PM
#10
The fuse that powers the gauge is the 15 amp engine fuse.
When you checked for voltage did you have a good ground??
Bad connection where the harness plugs into the sending unit it does not take much sometimes they look good to the naked eye but still a poor connection.
When you checked for voltage did you have a good ground??
Bad connection where the harness plugs into the sending unit it does not take much sometimes they look good to the naked eye but still a poor connection.
04-23-2012, 11:40 PM
#11
Registered User
This is what I had to do to fix my completely non working sender:
after checking the resistances on each level unit, they are really close to the same when "empty" but when full my original one says pretty much 0 which is in spec 3 +2/- 3 and this one I picked up drops to zero about 3/4 and then goes to like 100 ish when full which almost means when my tank is full it will show empty till it drops to about 3/4 of a tank give or take. Have not confirmed by hooking it up to the gauge but in theory that's what will happen.
So, I have come up with some redneck engineering on this one. "Fix" the the connectors that were so corroded that they came off and were probably off which is why my gas gauge stop working in the first place.
Just soldered some wires on the original connectors, now I just got to put some disconnects on the factory wiring and on new sensor wires. I did check the resistances after putting the wires on to "ensure" a good solder and came up with the same values as I did when directly on the terminals. Sorry for the poor photo as my camera sucks.
So, I have come up with some redneck engineering on this one. "Fix" the the connectors that were so corroded that they came off and were probably off which is why my gas gauge stop working in the first place.
Just soldered some wires on the original connectors, now I just got to put some disconnects on the factory wiring and on new sensor wires. I did check the resistances after putting the wires on to "ensure" a good solder and came up with the same values as I did when directly on the terminals. Sorry for the poor photo as my camera sucks.
04-24-2012, 02:33 PM
#12
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Thread Starter
the wires that go to the sending unit are good they are not rusted or fried there seems to be good connection to that part, im going to change out gauges today maybe there is a difference, if that doesnt work im going to start tracking the wires back and looking for grounds and what not, the lower middle fuse on the engine is good..
05-08-2012, 10:50 AM
#14
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Thread Starter
took out a sending unit out of another toyota and discovered the gauge isnt working WHY WHY.... BECAUSE of a faulty instrument cluster the fuel sending unit plug
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