12v symptoms I don't understand
Today while switching out 12v batteries my wrench momentarily shorted positive to trailer body (it sparked a little), I already had negative connected. Since then it appears that I only have 12v power...
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I'm making progress!
I load tested the battery and check for 12v on either side of the "short stop" and then pulled the fuse panel and confirmed 12v going in on the main, then 12v going out from each fuse terminal. I then moved to the thermostat and confirmed 12v going in. I move the thermostat to the "on" position and expected to see 12v going out but got nothing. An examination of the thin wires in the thermostat control revealed an open wire (see pic)
. So, as a test, I grabbed a spare piece of wire and bypassed the thermostat and the furnace came on. Cool
Now to the fridge: I go out to the access panel and see a box that looks like the control panel, it has wires to a 12v and grnd connection. I pull these, test and find no 12v. I test from positive to grnd wire and also from positive to frame, no 12v. I test continuity between grnd wire and frame and find continuity. So, I THINK this means the 12v has no power to it but the grnd is ok. My current challenge is to trace the 12v wire back to source and all I've been able to do so far is see that it goes behind fridge. I don't see it at the fuse panel. There are no fuses labeled "fridge" and I can't for the life of me figure out where that wire comes from. I'm beginning to think I'll need to pull the fridge to look behind it but that doesn't sound at all fun. Any hints? I'll buy a vowel!
Milt
I load tested the battery and check for 12v on either side of the "short stop" and then pulled the fuse panel and confirmed 12v going in on the main, then 12v going out from each fuse terminal. I then moved to the thermostat and confirmed 12v going in. I move the thermostat to the "on" position and expected to see 12v going out but got nothing. An examination of the thin wires in the thermostat control revealed an open wire (see pic)
. So, as a test, I grabbed a spare piece of wire and bypassed the thermostat and the furnace came on. CoolNow to the fridge: I go out to the access panel and see a box that looks like the control panel, it has wires to a 12v and grnd connection. I pull these, test and find no 12v. I test from positive to grnd wire and also from positive to frame, no 12v. I test continuity between grnd wire and frame and find continuity. So, I THINK this means the 12v has no power to it but the grnd is ok. My current challenge is to trace the 12v wire back to source and all I've been able to do so far is see that it goes behind fridge. I don't see it at the fuse panel. There are no fuses labeled "fridge" and I can't for the life of me figure out where that wire comes from. I'm beginning to think I'll need to pull the fridge to look behind it but that doesn't sound at all fun. Any hints? I'll buy a vowel!
Milt
