Headlights gone weird

[BiGDawG_RTL]

The headlights in my 87 h/b are really dim. It's not the lights because i replaced them thinking it was and I only have one high beam, it is bright as normal. and my high beam light does not come on in my dash. any ideas? i need to fix this, i can't afford to drive my blazer 70 mi to work every day!

thanks

[TheSummoner101]

fuse? check ground and battery connections

[DeathRat]

Check the voltage output of the Alternator at the Battery......
Your Alternator may not be putting out enough to keep them at full power.

[NXRacer]

usually dim headlights are a sign of bad grounding for the lights. clean up the electrical connections and it should brighten them up. Also check your charging system and make sure its up to par.

[rideredorgohome]

I agree with Deathrat. Check power for alternator/battery-should read 13-14V when read with a multimeter. Otherwise ur battery or alternator is going bad. How old is battery? Has this been happening for a long time? Do your lights alternately get brighter and then dimmer? Usually if it is a bad ground it wouldn't have just happened-it is usually when u dick around with an electrical part it happens. Check any work that you have done previously electrically. Make sure there are no wires exposed and/or touching frame parts.