I don't know where to go on this problem, I was driving along when
suddenly my radio went dark, its been about a month and the the
clock/radio is dark and the interior lights are all dark. the fuse for
COURTSY is a 20 and will spark and burn out as soon as I try to replace
it. Can anyone give me any suggestions for a solution?
Sounds like a wire got rubbed raw and is grounding out (shorting)
somewhere. The only real way to resolve this is to start disconnecting
any and everything that's powered off that fuse until you find the
guilty component. When you do isolate the circuit that's causing the
problem you can trace it down and repair the damaged section.
Start by disconnecting anything with a plug. Like the radio, and then
remove any light bulbs that would come on when you hit the switch. Try
it...if the fuse doesn't blow, starting reconnecting components until
it pops, then you've found the bad circuit.
This reminds me of something that happened to the parking lights on my
'86 K5 Blazer. Everytime I turned on the parking lights the fuse would
blow. After screwing around for a couple of hours I got brave and
crawled underneath the truck. Once under there, I cut the main hot
wire that was common to everything on the parking light circuit. I
replaced the fuse and turned 'em on--the fronts came on and the fuse
didn't blow. So at that point I knew it was isolated it to the back of
the truck. I disconnected the taillight harnesses behind the rear
bumper, reconnected the cut wire, and hit the switch--fuse blew. So at
that point I knew it was that wire, on the back end of the truck,
causing the problem--NOT any of the stuff plugged into it. The bad
part was that the short was somewhere on top of the gas tank and made
access impossible. I ended up cutting the other end of it as well and
feeding a new wire through the wiring loom, then connecting both ends.
Sometimes electrical troubles can be a real pain, and as you can see,
not always easy to diagnose. Cutting the wire was, for me, the only
way as that circuit ran from front to back and split off to every
parking light in the truck.
massive bookbag wrote:
Here is what I do. Take a blown fuse and solder a light bulb to the
terminals. Just use a diagonal cutting pliers to break some of the plastic
off the top of the blown fuse to expose the terminals. Solder some speaker
wire tot he terminals and solder a tail light lamp to the other end. Put the
fuse in and the lamp should light. (It the circuit is shorted, it will
light.) Then start moving wires, unplugging stuff and so on. When you find
whatever makes the lamp go off, you're there. If the problem is in the dome
circuit, removing the short make put the dome lamp in the circuit, and the
test lamp may just get dim unless the dome lamp/lamps are removed or the
doors are closed.
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