2010 Prius - "STOP" FUSE keeps blowing !

Tom Mayor · Dec 23, 2024 at 9:00 PM

rjparker said: ↑

If you unplug the taillight and the problem clears and it returns when it's plugged in, replace the assembly. Most likely you can get a used one locally at a LKQ salvage yard preferably. You buy on ebay means another salvage yard has to ship it.

A local yard will give you some return capability. I would take yours out to have in hand to compare.
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Thank you. I ordered a assembly on ebay for $65 shipped. It says returns are possible for 60 days... I'll see! Finger

Tom Mayor · Dec 23, 2024 at 9:00 PM

ChapmanF said: ↑

Good advice would be to look in the wiring diagram (Toyota Service Information and Where To Find It | PriusChat) and see if the left and right side use the same connector and with the same pin assignments (but for the turn signal being the left or right one, of course). If you didn't want to look in the diagram, you could probably answer the question by taking both units out and closely inspecting how they are wired.

It could be even easier to test on a bench. Take the driver's side unit out and take it to a bench and test the stop light function (using a fused or current-limited power supply). The wiring diagram excerpts already posted above show you which connector pins are involved.

As I said a couple times, if it were mine I would be tempted to look closely for any simply-repairable problem (accessible without taking the glued assembly apart) ... some visible damage to the external wiring or what not. Looking it over carefully on a well-lighted workbench could be a lot more conducive to that than trying to see while it's on the car.
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Yes the harness plugs are the same but I thought it could interfer something in the wiring. I didn't want to take the risk to mess something else. Thank you for your precious help.

Mendel Leisk · Dec 24, 2024 at 11:48 AM

FWIW I can just read the text in @ChapmanF ’s wiring diagram posting. A lifetime looking duplicated/faxed/tattered vendors’ drawings helps.

Tom Mayor · Dec 27, 2024 at 5:25 PM

Tom Mayor said: ↑

Thanks, again!

I went my car and unplugged all of the rear lights bulbs from socket but it didn't solve the issue. Another blown fuse. I only have 3 left lol.

For some reason, I thought that the relay would be a part in the main fuse box under the hood.

Do you think there is any other fuse / relay or something electrical related that it could make this fuse blown?

For the rear lights. Is there a way to actually disconnect the fuse(s) to disable them to potentially try to determinate if it could be a bad connection among the rear lights connection? I hope it make sense

Thanks!
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It was simply the complete assembly that blown the fuse. so odd. Part has been replaced, everything works as it used to. Thank you for your precious help.

rjparker · Dec 27, 2024 at 7:08 PM

It's because the led brake light is built into the assembly and is not replaceable by itself.

2010 Prius - "STOP" FUSE keeps blowing !

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2010 Prius - "STOP" FUSE keeps blowing !

Tom Mayor Junior Member

Tom Mayor Junior Member

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Tom Mayor Junior Member

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