hey guys, I run a H22a in a civic EK. I installed a new alternator a couple weeks ago, since then no problem. but yesterday my speedometer stop working, and I know alternator and speed sensor is on the same 7.5 fuse. it was blown.. I replace it and instantly it blow again.

replace it again and unplug the connector at the alternator and start the engine. the fuse did not blown. but as soon as I replug the alternator connector, it blown right away.

did some one ever had the same issue ?

 

There may be a short inside the alternator.

If you disconnect the large alternator wire but leave the 4P connector plugged in, does the fuse still blow?

 

Check the Fuse 15 TSB link in RonJ's sig-it may be applicable to you.