Well, the fuel gauge in my blazer isn’t working despite it bring a new Auto Meter gage along with a new sending unit from LMC and mostly new wire going to the back. I only have short piece of factory wire that goes to from the bulkhead to the instrument panel.
I need to know how much fuel my blazer has not because I drive it regularly, (I don’t) but because I don’t want to run out of fuel while I’m racing on nitrous.
I don’t have my multi-meter at home, but I have a few gauges, senders, and jumper wires lying around. I have my battery in the back of the blazer so I used that as my work bench.
I hooked everything up with jumper wires and was able to get the makeshift set up to work. I couldn’t get an old sender to work which I think had a bad ground wire. Luckily I had a new unit laying around and that worked great. It was neat to be able to move the float and watch the gauge move between full and empty.
I then took the jumper wire and hooked it up to the sender on the blazer. The gauge then read 3/4 of a tank.
...! Okay, we are now getting somewhere. Now before I continue with my story, before I installed the sender in my blazer, I did some “modifications” to the sending unit. I installed an 8AN vent with a tip-over valve and I kind of messed up the sending stud on top of the unit. I converted the plain stud to a threaded stud so I could hook up sending wire to the sender with a chimp on eyelet. So when I hooked up my jumper wire, I just clipped on over my existing connection with an alligator clip. Even though it was working with the makeshift set up. Something wasn’t working with the gage in the instrument panel.
I then disconnected the bulkhead connector at the fire wall and hooked up my jumper wire there. The makeshift gage went over full just like my instrument panel gage. So the problem lays between the bulkhead and the sender. But before investigate that wire, I wanted to make sure my instrument panel gage works. I hooked up a jumper wire from the bulkhead to ground and the gage went to Empty. Okay that works.
I then unhooked the sending wire from the sending unit, and hooked up the jumper wire. The makeshift gage went to beyond full.
...!? WTF!? Maybe the sending unit stud is dirty and I got lucky hooking the jumper wire the first time, but it is not working now. I reconnect the bulkhead and ground the wire that used to be hooked up to the sending unit. The instrument gage now goes to Empty.
By this time it is getting dark. I picked everything up went inside the house. Tomorrow I clean the eyelet and the stud and hook every back up and see if that works.
I need to know how much fuel my blazer has not because I drive it regularly, (I don’t) but because I don’t want to run out of fuel while I’m racing on nitrous.
I don’t have my multi-meter at home, but I have a few gauges, senders, and jumper wires lying around. I have my battery in the back of the blazer so I used that as my work bench.
I hooked everything up with jumper wires and was able to get the makeshift set up to work. I couldn’t get an old sender to work which I think had a bad ground wire. Luckily I had a new unit laying around and that worked great. It was neat to be able to move the float and watch the gauge move between full and empty.
I then took the jumper wire and hooked it up to the sender on the blazer. The gauge then read 3/4 of a tank.
...! Okay, we are now getting somewhere. Now before I continue with my story, before I installed the sender in my blazer, I did some “modifications” to the sending unit. I installed an 8AN vent with a tip-over valve and I kind of messed up the sending stud on top of the unit. I converted the plain stud to a threaded stud so I could hook up sending wire to the sender with a chimp on eyelet. So when I hooked up my jumper wire, I just clipped on over my existing connection with an alligator clip. Even though it was working with the makeshift set up. Something wasn’t working with the gage in the instrument panel.
I then disconnected the bulkhead connector at the fire wall and hooked up my jumper wire there. The makeshift gage went over full just like my instrument panel gage. So the problem lays between the bulkhead and the sender. But before investigate that wire, I wanted to make sure my instrument panel gage works. I hooked up a jumper wire from the bulkhead to ground and the gage went to Empty. Okay that works.
I then unhooked the sending wire from the sending unit, and hooked up the jumper wire. The makeshift gage went to beyond full.
...!? WTF!? Maybe the sending unit stud is dirty and I got lucky hooking the jumper wire the first time, but it is not working now. I reconnect the bulkhead and ground the wire that used to be hooked up to the sending unit. The instrument gage now goes to Empty.
By this time it is getting dark. I picked everything up went inside the house. Tomorrow I clean the eyelet and the stud and hook every back up and see if that works.
