Question about 2007 Subaru B9 Tribeca

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Subaru 2007 B-9 keeps blowing 20 amp. back up fuse. What is the most likely culprit?

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Find out which circuits are using that fuse to narrow the problem down. sometimes the fuse box lid/cover gives the list.

Posted on Mar 02, 2015

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Before you change the fuse again, look for any other electrical failures. e.g. is the interior light working. Brake lights? Turn signals?

Does the fuse blow only when you select reverse? If so, then look for the switch on the transmission and disconnect it. Does the fuse still blow? If it does, then that fuse is controlling something else.

I suspect that a wire somewhere is shorted to ground. You may need to open the centre console and look at the wires around the shift lever when reverse is selected.

Your car is now 8 years old. There's a large harness that runs along the LHS sill, under the carpet. Water getting in here often corrodes the wires and ground connections.

Posted on Mar 04, 2015

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