1997 subaru outback "check engine light" on for 6 months

Question edited for clarity.
Question moved to model category.

That is pretty crazy. It would be cheaper to get an auto electrician for an hour than to keep buying alternators. If a fuse melts, you have to find the reason why before replacing it. Jimmy rigging electrics just passes the problem along to another component. A Professional Grade Scan tool computer can diagnose in 20 minutes. They cost $3.5k to $5k!

https://www.google.com/search?q=mobile+auto+electrician+near+me

..

Check code first,why you changed radiator?

Engine light comes on when service is needed usually, oabout service time ish. I would consult a dealers mechanic...just in case

the biggest draw back that you will have to check first is the ratio of the diffs you want to change. If they are not the same but will fit then you will destroy the 3rd diff in the transmission from excessive use.

not sure how that could be the cause, but check to see if vent valve is stuck closed. Otherwise, see my notes at link below.
Do It Yourself Diagnosis and Repair

the check engine light comes on if there is a problem with thecomputer system related to the emmision, when this is is repaired the light on can only be turned off with a monitor,code reader. some of these are quite inexpensive.over the web or at a part store.

If you are getting sparks at the positive cable when attaching I would suspect a hard short in the system. Check that the starter has not shorted.

You may have to take it to a shop and have them connect their OBD tool to the computer and clear the deep memory. If you have a code left in the deep memory it can reapear like that. Good luck. Please rate me so I know how I'm doing. Thanks.

I just bought a 1999 Outback with the same problem, the previous owner says replace the PCV valve

Hope it works