Back up fuse keeps blowing

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07 Impreza back up fuse (17) keeps blowing. Does anybody know what all this fuse powers?
Thanks!
 
Backup, like spare, or back light fuse? It is probably a bare wire where the rear opens/closes grounding out. What did your research uncover...or are we your researchers? :)
 
Hi, thank you for your response Mr. Bmart!!
Sorry for the late response. still working this between fixing issues on other vehicles I own.

What I found so far is the following:
1) when I hooked a multimeter between all the rear light pins (tail light, signal light, Back up light) and a ground (chassis), they all show a short to ground. Not sure if this is normal? Doesn’t seem normal to me.
2) the VSS power is also shorted to ground
3) Speedometer is flat lined and odometer is not registering mileage
4) Check Engine light is illuminated
5) Cruise Control light is illuminated, even though the function is off

All of these seem to have occurred simultaneously. Other than the above the ABS light has been illuminated for months.

Still chasing a possible bare wire.

Just wondering if any other folks have had a similar issues and possible thoughts on how to remedy these issues.

I need to get this fixed asap to obtain registration tags for 2025.

Thanks!
 
Hi, thank you for your response Mr. Bmart!!
Sorry for the late response. still working this between fixing issues on other vehicles I own.

What I found so far is the following:
1) when I hooked a multimeter between all the rear light pins (tail light, signal light, Back up light) and a ground (chassis), they all show a short to ground. Not sure if this is normal? Doesn’t seem normal to me.
2) the VSS power is also shorted to ground
3) Speedometer is flat lined and odometer is not registering mileage
4) Check Engine light is illuminated
5) Cruise Control light is illuminated, even though the function is off

All of these seem to have occurred simultaneously. Other than the above the ABS light has been illuminated for months.

Still chasing a possible bare wire.

Just wondering if any other folks have had a similar issues and possible thoughts on how to remedy these issues.

I need to get this fixed asap to obtain registration tags for 2025.

Thanks!
Oh, this would be fuse #17 underneath to the left of the steering wheel behind the ashtray.
 
The chart says 15A Back
image.jpg
Also would anybody know what all is powered by this fuse? That would help me trace the wiring to find the short.
Thanks!!
 

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