charging system

[rebelrat]

in my 89 xj project the dash guage for batt reads almost in the red. the gut at the parts store said that the batt and alternator are good ?????
if i put on lights and heater it goes into the red. parts guy still said it is fine????????????????



any advice????

 

[langer1]

So the guage is bad.

 

[kennzz05]

check it with a meter