95 b2300

Runs rough & misses when headlights on

First thing I'd do would be to measure the voltage across the battery terminals at about 1000 rpms running with lights off, and then also running with lights on.

Sounds like ur alternater is bad

"Sounds like ur alternater is bad"

That's why I strongly suggested he test. So he (and we) don;t have to guess. Personally, I'd get pissed if I bought parts to replace good ones !!! His post was a week ago, hope he's fixed the problem and not just jackin' around !

Alt is good now I'm going wire to wire checking. Gonna take for ever

Check battery terminals frame to ground connections and clean up ur plug to your alternator

Check for a dry cell in the battery. Lack of water will make the current pulsate.

I did some more research on your vehicle and if you haven't figured it out yet maybe you have a flaky daylight running module. https://www.google.com/?gws_rd=ssl#q=do+1995+b2300+mazdas+have+daylight+running+lights

Here's another thread that deals with your issue. http://www.ranger-forums.com/general-technical-electrical-18/daytime-running-lights-canada-causing-dim-lights-140467/