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Old 07-05-2022, 11:53 PM   #1
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Question Turn signals not working

2001 Bluebird International. Wondering if anyone can help me with a wiring problem? The front turn signals go on briefly but not the back ones. After a minute or so the fuse/breaker pops and fronts go off. Reset and they do the same thing. Previously disconnected the rear window alarm and not sure if that has anything to do with it or if we put a screw through a wire somewhere. Or something else. They worked ok before we started working on it but not sure exactly when they stopped. The pictures are of the disconnected wires from the emergency window alarm.Any help would be appreciated.

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Old 07-06-2022, 03:57 PM   #2
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Ya sounds like you put a screw through some wires, start looking.
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Old 07-07-2022, 10:26 AM   #3
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You didn't post pictures, but it doesn't matter... nothing you did with the rear window alarm would cause the turn signal behavior you describe unless it involved also damaging the turn signal wiring. In most cases a short (like putting a screw through a hot wire) would pretty much blow the fuse instantly, but maybe it being on the flasher circuit is keeping it alive longer than it otherwise would (taking a while to blow as heat builds up each flash).

I'd make sure your lights / sockets / flasher module are all good to go just to make sure you're troubleshooting without any unknown loose ends complicating your findings, but in the end you're probably going to need to follow the wiring & find where the fault lies, run new wires, or repurpose existing wiring following the same path.
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Old 07-07-2022, 12:47 PM   #4
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a short circuit

some how, some way, the power going through the turn signal switch is going to ground instead of going only through the light bulbs. damage to the wires after the circuit breaker, turn signal switch, light bulb housing, is what you are going to have to isolate and repair.

you can make some assumptions and just run new wire. assumptions might be wrong.

there are ways to test. and that is how you are going to find what the problem is.

sometimes just by passing all of the old stuff is faster. I personally really despise doing it that way.

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Old 07-07-2022, 03:38 PM   #5
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Quote:
Originally Posted by magnakansas View Post
some how, some way, the power going through the turn signal switch is going to ground instead of going only through the light bulbs. damage to the wires after the circuit breaker, turn signal switch, light bulb housing, is what you are going to have to isolate and repair.

you can make some assumptions and just run new wire. assumptions might be wrong.

there are ways to test. and that is how you are going to find what the problem is.

sometimes just by passing all of the old stuff is faster. I personally really despise doing it that way.

you tube university is your friend.

william 785 207 7600

YEP TEST
Multimeter.



Test from the ground terminal (outer barrel if an incandescent type holder) in a rear turn signal to chassis ground - you should find continuity.


Test from the hot terminal (the center contact(s) of an incandescent type holder) in the same lamp fixture. - You should NOT find continuity. If you do, you have a direct short to ground and need to fix the situation.


One way to fix it is to find where the short is.
Another is to determine what area the short is in and isolate that area (cut the wire on both sides of the short) then install a new piece of wire, properly labeled for later trouble shooting if needed.

Either way you go, you need a good understanding of exactly what you're doing.
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